Add reusing cache stub

src/compiler/builder.ts

@@ -65,6 +65,9 @@ import {
     ModeAwareCache,
     noop,
     notImplemented,
+    OldBuildInfoProgram,
+    OldBuildInfoProgramConstructor,
+    OldBuildInfoProgramHost,
     outFile,
     Path,
     Program,
@@ -1431,7 +1434,7 @@ export function getBuilderCreationParameters(newProgramOrRootNames: Program | re
             rootNames: newProgramOrRootNames,
             options: hostOrOptions as CompilerOptions,
             host: oldProgramOrHost as CompilerHost,
-            oldProgram: oldProgram && oldProgram.getProgramOrUndefined(),
+            oldProgram: oldProgram?.getProgramOrOldBuildInfoProgramUndefined(),
             configFileParsingDiagnostics,
             projectReferences
         });
@@ -1525,6 +1528,7 @@ export function createBuilderProgram(kind: BuilderProgramKind, { newProgram, hos
     builderProgram.getSemanticDiagnostics = getSemanticDiagnostics;
     builderProgram.emit = emit;
     builderProgram.releaseProgram = () => releaseCache(state);
+    builderProgram.getProgramOrOldBuildInfoProgramUndefined = createGetProgramOrOldBuildInfoProgramUndefined(state);
 
     if (kind === BuilderProgramKind.SemanticDiagnosticsBuilderProgram) {
         (builderProgram as SemanticDiagnosticsBuilderProgram).getSemanticDiagnosticsOfNextAffectedFile = getSemanticDiagnosticsOfNextAffectedFile;
@@ -1945,6 +1949,7 @@ export function createBuilderProgramUsingProgramBuildInfo(buildInfo: BuildInfo,
         restoreEmitState: noop,
         getProgram: notImplemented,
         getProgramOrUndefined: returnUndefined,
+        getProgramOrOldBuildInfoProgramUndefined: createGetProgramOrOldBuildInfoProgramUndefined(state),
         releaseProgram: noop,
         getCompilerOptions: () => state.compilerOptions,
         getSourceFile: notImplemented,
@@ -1990,6 +1995,33 @@ export function createBuilderProgramUsingProgramBuildInfo(buildInfo: BuildInfo,
     }
 }
 
+function createGetProgramOrOldBuildInfoProgramUndefined(state: ReusableBuilderProgramState): () => Program | OldBuildInfoProgramConstructor | undefined {
+    return () => state.program ??
+            (state.cacheResolutions || state.resuableCacheResolutions ?
+                (host => createOldBuildInfoProgram(
+                    host,
+                    state.compilerOptions,
+                    state.cacheResolutions,
+                    // Prefer cached resolutions over serialized format
+                    !state.cacheResolutions ? state.resuableCacheResolutions : undefined,
+                )) :
+                undefined
+            );
+}
+
+/** @internal */
+export function createOldBuildInfoProgram(
+    _host: OldBuildInfoProgramHost,
+    compilerOptions: CompilerOptions,
+    cacheResolutions: ReusableBuilderProgramState["cacheResolutions"],
+    resuableCacheResolutions: ReusableBuilderProgramState["resuableCacheResolutions"],
+): OldBuildInfoProgram | undefined {
+    if (!cacheResolutions && !resuableCacheResolutions) return undefined;
+    return {
+        getCompilerOptions: () => compilerOptions,
+    };
+}
+
 /** @internal */
 export function getBuildInfoFileVersionMap(
     program: ProgramBuildInfo,
@@ -2015,6 +2047,7 @@ export function createRedirectedBuilderProgram(getState: () => { program?: Progr
         restoreEmitState: noop,
         getProgram,
         getProgramOrUndefined: () => getState().program,
+        getProgramOrOldBuildInfoProgramUndefined: () => getState().program,
         releaseProgram: () => getState().program = undefined,
         getCompilerOptions: () => getState().compilerOptions,
         getSourceFile: fileName => getProgram().getSourceFile(fileName),

src/compiler/builderPublic.ts

@@ -10,6 +10,7 @@ import {
     DiagnosticWithLocation,
     EmitResult,
     getBuilderCreationParameters,
+    OldBuildInfoProgramConstructor,
     Program,
     ProjectReference,
     ReusableBuilderProgramState,
@@ -63,6 +64,12 @@ export interface BuilderProgram {
      * @internal
      */
     getProgramOrUndefined(): Program | undefined;
+    /**
+     * Returns current program that could be undefined if the program was released, or cached build info program (currently module and type ref cache)
+     *
+     * @internal
+     */
+    getProgramOrOldBuildInfoProgramUndefined(): Program | OldBuildInfoProgramConstructor | undefined;
     /**
      * Releases reference to the program, making all the other operations that need program to fail.
      *

src/compiler/program.ts

@@ -45,6 +45,7 @@ import {
     createModuleResolutionCache,
     createMultiMap,
     CreateProgramOptions,
+    CreateProgramOptionsWithOldBuildInfoProgramConstructor,
     createSourceFile,
     CreateSourceFileOptions,
     createSymlinkCache,
@@ -226,6 +227,8 @@ import {
     notImplementedResolver,
     noTransformers,
     ObjectLiteralExpression,
+    OldBuildInfoProgram,
+    OldBuildInfoProgramConstructor,
     OperationCanceledException,
     optionsHaveChanges,
     outFile,
@@ -1388,7 +1391,7 @@ function shouldProgramCreateNewSourceFiles(program: Program | undefined, newOpti
     return optionsHaveChanges(program.getCompilerOptions(), newOptions, sourceFileAffectingCompilerOptions);
 }
 
-function createCreateProgramOptions(rootNames: readonly string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program, configFileParsingDiagnostics?: readonly Diagnostic[]): CreateProgramOptions {
+function createCreateProgramOptions(rootNames: readonly string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program | OldBuildInfoProgramConstructor, configFileParsingDiagnostics?: readonly Diagnostic[]): CreateProgramOptionsWithOldBuildInfoProgramConstructor {
     return {
         rootNames,
         options,
@@ -1409,6 +1412,8 @@ function createCreateProgramOptions(rootNames: readonly string[], options: Compi
  * @returns A 'Program' object.
  */
 export function createProgram(createProgramOptions: CreateProgramOptions): Program;
+/** @internal */
+export function createProgram(createProgramOptions: CreateProgramOptionsWithOldBuildInfoProgramConstructor): Program; // eslint-disable-line @typescript-eslint/unified-signatures
 /**
  * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
  * that represent a compilation unit.
@@ -1424,10 +1429,10 @@ export function createProgram(createProgramOptions: CreateProgramOptions): Progr
  * @returns A 'Program' object.
  */
 export function createProgram(rootNames: readonly string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program, configFileParsingDiagnostics?: readonly Diagnostic[]): Program;
-export function createProgram(rootNamesOrOptions: readonly string[] | CreateProgramOptions, _options?: CompilerOptions, _host?: CompilerHost, _oldProgram?: Program, _configFileParsingDiagnostics?: readonly Diagnostic[]): Program {
+export function createProgram(rootNamesOrOptions: readonly string[] | CreateProgramOptionsWithOldBuildInfoProgramConstructor, _options?: CompilerOptions, _host?: CompilerHost, _oldProgram?: Program, _configFileParsingDiagnostics?: readonly Diagnostic[]): Program {
     const createProgramOptions = isArray(rootNamesOrOptions) ? createCreateProgramOptions(rootNamesOrOptions, _options!, _host, _oldProgram, _configFileParsingDiagnostics) : rootNamesOrOptions; // TODO: GH#18217
     const { rootNames, options, configFileParsingDiagnostics, projectReferences } = createProgramOptions;
-    let { oldProgram } = createProgramOptions;
+    let { oldProgram: oldProgramOrOldBuildInfoProgramConstructor } = createProgramOptions;
 
     let processingDefaultLibFiles: SourceFile[] | undefined;
     let processingOtherFiles: SourceFile[] | undefined;
@@ -1569,6 +1574,12 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
             );
     }
 
+    let oldProgram = typeof oldProgramOrOldBuildInfoProgramConstructor === "object" ? oldProgramOrOldBuildInfoProgramConstructor : undefined;
+    let oldBuildInfoProgram: OldBuildInfoProgram | undefined;
+    if (!oldProgram && typeof oldProgramOrOldBuildInfoProgramConstructor === "function") {
+        oldBuildInfoProgram = oldProgramOrOldBuildInfoProgramConstructor(host);
+    }
+
     // Map from a stringified PackageId to the source file with that id.
     // Only one source file may have a given packageId. Others become redirects (see createRedirectSourceFile).
     // `packageIdToSourceFile` is only used while building the program, while `sourceFileToPackageName` and `isSourceFileTargetOfRedirect` are kept around.
@@ -1749,6 +1760,8 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
 
     // unconditionally set oldProgram to undefined to prevent it from being captured in closure
     oldProgram = undefined;
+    oldBuildInfoProgram = undefined;
+    oldProgramOrOldBuildInfoProgramConstructor = undefined;
 
     const program: Program = {
         getRootFileNames: () => rootNames,
@@ -2222,14 +2235,21 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
     }
 
     function tryReuseStructureFromOldProgram(): StructureIsReused {
-        if (!oldProgram) {
+        // check properties that can affect structure of the program or module resolution strategy
+        // if any of these properties has changed - structure cannot be reused
+        const oldOptions = oldProgram?.getCompilerOptions() || oldBuildInfoProgram?.getCompilerOptions();
+        if (!oldOptions || changesAffectModuleResolution(oldOptions, options)) {
             return StructureIsReused.Not;
         }
 
-        // check properties that can affect structure of the program or module resolution strategy
-        // if any of these properties has changed - structure cannot be reused
-        const oldOptions = oldProgram.getCompilerOptions();
-        if (changesAffectModuleResolution(oldOptions, options)) {
+        const result = tryReuseStructureFromOldProgramWorker();
+        return options.cacheResolutions && (oldProgram || oldBuildInfoProgram) && result === StructureIsReused.Not ?
+            StructureIsReused.SafeModuleCache :
+            result;
+    }
+
+    function tryReuseStructureFromOldProgramWorker(): StructureIsReused {
+        if (!oldProgram) {
             return StructureIsReused.Not;
         }
 
@@ -2414,7 +2434,7 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
             return structureIsReused;
         }
 
-        if (changesAffectingProgramStructure(oldOptions, options)) {
+        if (changesAffectingProgramStructure(oldProgram.getCompilerOptions(), options)) {
             return StructureIsReused.SafeModules;
         }
 

src/compiler/types.ts

@@ -4571,6 +4571,7 @@ export interface ResolvedProjectReference {
 /** @internal */
 export const enum StructureIsReused {
     Not,
+    SafeModuleCache,
     SafeModules,
     Completely,
 }
@@ -6968,6 +6969,22 @@ export interface CreateProgramOptions {
     configFileParsingDiagnostics?: readonly Diagnostic[];
 }
 
+/** @internal */
+export interface OldBuildInfoProgram {
+    getCompilerOptions(): CompilerOptions;
+}
+
+/** @internal */
+export interface OldBuildInfoProgramHost {
+    fileExists(fileName: string): boolean;
+}
+
+/** @internal */
+export type OldBuildInfoProgramConstructor = (host: OldBuildInfoProgramHost) => OldBuildInfoProgram | undefined;
+
+/** @internal */
+export type CreateProgramOptionsWithOldBuildInfoProgramConstructor = Omit<CreateProgramOptions, "oldProgram"> & { oldProgram?: Program | OldBuildInfoProgramConstructor; };
+
 /** @internal */
 export interface CommandLineOptionBase {
     name: string;

tests/baselines/reference/tsbuildWatch/cacheResolutions/bundle-emit-already-built.js

@@ -447,7 +447,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts
@@ -708,7 +708,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts
@@ -970,7 +970,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts
@@ -1212,7 +1212,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts
@@ -1927,7 +1927,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts

tests/baselines/reference/tsbuildWatch/cacheResolutions/bundle-emit.js

@@ -382,7 +382,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts
@@ -643,7 +643,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts
@@ -905,7 +905,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts
@@ -1147,7 +1147,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts
@@ -1862,7 +1862,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts

tests/baselines/reference/tsbuildWatch/cacheResolutions/multi-file-already-built.js

@@ -1183,7 +1183,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts
@@ -2064,7 +2064,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts
@@ -2961,7 +2961,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts
@@ -3955,7 +3955,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts
@@ -5086,7 +5086,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts

tests/baselines/reference/tsbuildWatch/cacheResolutions/multi-file.js

@@ -1087,7 +1087,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts
@@ -1968,7 +1968,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts
@@ -2865,7 +2865,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts
@@ -3859,7 +3859,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts
@@ -4990,7 +4990,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithImports.ts","/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts

tests/baselines/reference/tscWatch/cacheResolutions/bundle-emit-already-built.js

@@ -3030,7 +3030,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg2/index.d.ts
@@ -3607,7 +3607,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts
@@ -4079,7 +4079,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/randomFileForImport.ts
@@ -4435,7 +4435,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/randomFileForImport.ts

tests/baselines/reference/tscWatch/cacheResolutions/bundle-emit.js

@@ -2966,7 +2966,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg2/index.d.ts
@@ -3543,7 +3543,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/pkg0.d.ts
@@ -4015,7 +4015,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/randomFileForImport.ts
@@ -4371,7 +4371,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"module":2,"composite":true,"cacheResolutions":true,"traceResolution":true,"out":"./out.js","watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/randomFileForImport.ts

tests/baselines/reference/tscWatch/cacheResolutions/multi-file-already-built.js

@@ -5320,7 +5320,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg2/import.d.ts
@@ -6107,7 +6107,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts
@@ -6741,7 +6741,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/randomFileForImport.ts
@@ -7217,7 +7217,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/randomFileForImport.ts

tests/baselines/reference/tscWatch/cacheResolutions/multi-file.js

@@ -4766,7 +4766,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/fileWithTypeRefs.ts","/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg2/import.d.ts
@@ -5553,7 +5553,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/node_modules/pkg0/import.d.ts
@@ -6187,7 +6187,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/randomFileForImport.ts
@@ -6663,7 +6663,7 @@ node_modules/@types/pkg4/index.d.ts
 
 Program root files: ["/src/project/randomFileForImport.ts","/src/project/randomFileForTypeRef.ts"]
 Program options: {"moduleResolution":3,"composite":true,"cacheResolutions":true,"traceResolution":true,"watch":true,"explainFiles":true,"extendedDiagnostics":true,"configFilePath":"/src/project/tsconfig.json"}
-Program structureReused: Not
+Program structureReused: SafeModuleCache
 Program files::
 /a/lib/lib.d.ts
 /src/project/randomFileForImport.ts

tests/baselines/reference/tsserver/cacheResolutions/bundle-emit-not-built.js

@@ -883,7 +883,7 @@ Info 208  [00:04:58.000] Reusing resolution of type reference directive 'pkg3' f
 Info 209  [00:04:59.000] Reusing resolution of module 'pkg0' from '/src/project/randomFileForImport.ts' of old program, it was successfully resolved to '/src/project/pkg0.d.ts'.
 Info 210  [00:05:00.000] Reusing resolution of type reference directive 'pkg2' from '/src/project/randomFileForTypeRef.ts' of old program, it was successfully resolved to '/src/project/node_modules/pkg2/index.d.ts'.
 Info 211  [00:05:01.000] Reusing resolution of type reference directive 'pkg4' from '/src/project/__inferred type names__.ts' of old program, it was successfully resolved to '/src/project/node_modules/@types/pkg4/index.d.ts'.
-Info 212  [00:05:02.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 6 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 212  [00:05:02.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 6 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 213  [00:05:03.000] Project '/src/project/tsconfig.json' (Configured)
 Info 214  [00:05:04.000] 	Files (8)
 	/a/lib/lib.d.ts
@@ -1000,7 +1000,7 @@ Info 233  [00:05:40.000] Starting updateGraphWorker: Project: /src/project/tscon
 Info 234  [00:05:41.000] Reusing resolution of module 'pkg0' from '/src/project/randomFileForImport.ts' of old program, it was successfully resolved to '/src/project/pkg0.d.ts'.
 Info 235  [00:05:42.000] Reusing resolution of type reference directive 'pkg2' from '/src/project/randomFileForTypeRef.ts' of old program, it was successfully resolved to '/src/project/node_modules/pkg2/index.d.ts'.
 Info 236  [00:05:43.000] Reusing resolution of type reference directive 'pkg4' from '/src/project/__inferred type names__.ts' of old program, it was successfully resolved to '/src/project/node_modules/@types/pkg4/index.d.ts'.
-Info 237  [00:05:44.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 7 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 237  [00:05:44.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 7 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 238  [00:05:45.000] Project '/src/project/tsconfig.json' (Configured)
 Info 239  [00:05:46.000] 	Files (6)
 	/a/lib/lib.d.ts
@@ -1126,7 +1126,7 @@ Info 277  [00:06:41.000] File '/pkg0.jsx' does not exist.
 Info 278  [00:06:42.000] ======== Module name 'pkg0' was not resolved. ========
 Info 279  [00:06:43.000] Reusing resolution of type reference directive 'pkg2' from '/src/project/randomFileForTypeRef.ts' of old program, it was successfully resolved to '/src/project/node_modules/pkg2/index.d.ts'.
 Info 280  [00:06:44.000] Reusing resolution of type reference directive 'pkg4' from '/src/project/__inferred type names__.ts' of old program, it was successfully resolved to '/src/project/node_modules/@types/pkg4/index.d.ts'.
-Info 281  [00:06:45.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 8 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 281  [00:06:45.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 8 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 282  [00:06:46.000] Project '/src/project/tsconfig.json' (Configured)
 Info 283  [00:06:47.000] 	Files (5)
 	/a/lib/lib.d.ts
@@ -1232,7 +1232,7 @@ Info 306  [00:07:27.000] Directory '/src/node_modules' does not exist, skipping
 Info 307  [00:07:28.000] Directory '/node_modules' does not exist, skipping all lookups in it.
 Info 308  [00:07:29.000] ======== Type reference directive 'pkg2' was not resolved. ========
 Info 309  [00:07:30.000] Reusing resolution of type reference directive 'pkg4' from '/src/project/__inferred type names__.ts' of old program, it was successfully resolved to '/src/project/node_modules/@types/pkg4/index.d.ts'.
-Info 310  [00:07:31.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 9 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 310  [00:07:31.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 9 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 311  [00:07:32.000] Project '/src/project/tsconfig.json' (Configured)
 Info 312  [00:07:33.000] 	Files (4)
 	/a/lib/lib.d.ts

tests/baselines/reference/tsserver/cacheResolutions/bundle-emit.js

@@ -883,7 +883,7 @@ Info 208  [00:04:58.000] Reusing resolution of type reference directive 'pkg3' f
 Info 209  [00:04:59.000] Reusing resolution of module 'pkg0' from '/src/project/randomFileForImport.ts' of old program, it was successfully resolved to '/src/project/pkg0.d.ts'.
 Info 210  [00:05:00.000] Reusing resolution of type reference directive 'pkg2' from '/src/project/randomFileForTypeRef.ts' of old program, it was successfully resolved to '/src/project/node_modules/pkg2/index.d.ts'.
 Info 211  [00:05:01.000] Reusing resolution of type reference directive 'pkg4' from '/src/project/__inferred type names__.ts' of old program, it was successfully resolved to '/src/project/node_modules/@types/pkg4/index.d.ts'.
-Info 212  [00:05:02.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 6 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 212  [00:05:02.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 6 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 213  [00:05:03.000] Project '/src/project/tsconfig.json' (Configured)
 Info 214  [00:05:04.000] 	Files (8)
 	/a/lib/lib.d.ts
@@ -1000,7 +1000,7 @@ Info 233  [00:05:40.000] Starting updateGraphWorker: Project: /src/project/tscon
 Info 234  [00:05:41.000] Reusing resolution of module 'pkg0' from '/src/project/randomFileForImport.ts' of old program, it was successfully resolved to '/src/project/pkg0.d.ts'.
 Info 235  [00:05:42.000] Reusing resolution of type reference directive 'pkg2' from '/src/project/randomFileForTypeRef.ts' of old program, it was successfully resolved to '/src/project/node_modules/pkg2/index.d.ts'.
 Info 236  [00:05:43.000] Reusing resolution of type reference directive 'pkg4' from '/src/project/__inferred type names__.ts' of old program, it was successfully resolved to '/src/project/node_modules/@types/pkg4/index.d.ts'.
-Info 237  [00:05:44.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 7 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 237  [00:05:44.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 7 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 238  [00:05:45.000] Project '/src/project/tsconfig.json' (Configured)
 Info 239  [00:05:46.000] 	Files (6)
 	/a/lib/lib.d.ts
@@ -1126,7 +1126,7 @@ Info 277  [00:06:41.000] File '/pkg0.jsx' does not exist.
 Info 278  [00:06:42.000] ======== Module name 'pkg0' was not resolved. ========
 Info 279  [00:06:43.000] Reusing resolution of type reference directive 'pkg2' from '/src/project/randomFileForTypeRef.ts' of old program, it was successfully resolved to '/src/project/node_modules/pkg2/index.d.ts'.
 Info 280  [00:06:44.000] Reusing resolution of type reference directive 'pkg4' from '/src/project/__inferred type names__.ts' of old program, it was successfully resolved to '/src/project/node_modules/@types/pkg4/index.d.ts'.
-Info 281  [00:06:45.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 8 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 281  [00:06:45.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 8 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 282  [00:06:46.000] Project '/src/project/tsconfig.json' (Configured)
 Info 283  [00:06:47.000] 	Files (5)
 	/a/lib/lib.d.ts
@@ -1232,7 +1232,7 @@ Info 306  [00:07:27.000] Directory '/src/node_modules' does not exist, skipping
 Info 307  [00:07:28.000] Directory '/node_modules' does not exist, skipping all lookups in it.
 Info 308  [00:07:29.000] ======== Type reference directive 'pkg2' was not resolved. ========
 Info 309  [00:07:30.000] Reusing resolution of type reference directive 'pkg4' from '/src/project/__inferred type names__.ts' of old program, it was successfully resolved to '/src/project/node_modules/@types/pkg4/index.d.ts'.
-Info 310  [00:07:31.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 9 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 310  [00:07:31.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 9 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 311  [00:07:32.000] Project '/src/project/tsconfig.json' (Configured)
 Info 312  [00:07:33.000] 	Files (4)
 	/a/lib/lib.d.ts

tests/baselines/reference/tsserver/cacheResolutions/multi-file-not-built.js

@@ -1400,7 +1400,7 @@ Info 490  [00:10:01.000] File '/a/lib/package.json' does not exist according to
 Info 491  [00:10:02.000] File '/a/package.json' does not exist according to earlier cached lookups.
 Info 492  [00:10:03.000] File '/package.json' does not exist according to earlier cached lookups.
 Info 493  [00:10:04.000] FileWatcher:: Close:: WatchInfo: /src/project/node_modules/pkg1/package.json 2000 undefined Project: /src/project/tsconfig.json WatchType: File location affecting resolution
-Info 494  [00:10:05.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 6 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 494  [00:10:05.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 6 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 495  [00:10:06.000] Project '/src/project/tsconfig.json' (Configured)
 Info 496  [00:10:07.000] 	Files (8)
 	/a/lib/lib.d.ts
@@ -1558,7 +1558,7 @@ Info 533  [00:11:01.000] File '/a/lib/package.json' does not exist according to
 Info 534  [00:11:02.000] File '/a/package.json' does not exist according to earlier cached lookups.
 Info 535  [00:11:03.000] File '/package.json' does not exist according to earlier cached lookups.
 Info 536  [00:11:04.000] FileWatcher:: Close:: WatchInfo: /src/project/node_modules/pkg3/package.json 2000 undefined Project: /src/project/tsconfig.json WatchType: File location affecting resolution
-Info 537  [00:11:05.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 7 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 537  [00:11:05.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 7 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 538  [00:11:06.000] Project '/src/project/tsconfig.json' (Configured)
 Info 539  [00:11:07.000] 	Files (6)
 	/a/lib/lib.d.ts
@@ -1725,7 +1725,7 @@ Info 599  [00:12:24.000] File '/package.json' does not exist according to earlie
 Info 600  [00:12:25.000] File '/a/lib/package.json' does not exist according to earlier cached lookups.
 Info 601  [00:12:26.000] File '/a/package.json' does not exist according to earlier cached lookups.
 Info 602  [00:12:27.000] File '/package.json' does not exist according to earlier cached lookups.
-Info 603  [00:12:28.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 8 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 603  [00:12:28.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 8 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 604  [00:12:29.000] Project '/src/project/tsconfig.json' (Configured)
 Info 605  [00:12:30.000] 	Files (5)
 	/a/lib/lib.d.ts
@@ -1875,7 +1875,7 @@ Info 652  [00:13:34.000] File '/package.json' does not exist according to earlie
 Info 653  [00:13:35.000] File '/a/lib/package.json' does not exist according to earlier cached lookups.
 Info 654  [00:13:36.000] File '/a/package.json' does not exist according to earlier cached lookups.
 Info 655  [00:13:37.000] File '/package.json' does not exist according to earlier cached lookups.
-Info 656  [00:13:38.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 9 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 656  [00:13:38.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 9 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 657  [00:13:39.000] Project '/src/project/tsconfig.json' (Configured)
 Info 658  [00:13:40.000] 	Files (4)
 	/a/lib/lib.d.ts

tests/baselines/reference/tsserver/cacheResolutions/multi-file.js

@@ -1863,7 +1863,7 @@ Info 490  [00:10:06.000] File '/a/lib/package.json' does not exist according to
 Info 491  [00:10:07.000] File '/a/package.json' does not exist according to earlier cached lookups.
 Info 492  [00:10:08.000] File '/package.json' does not exist according to earlier cached lookups.
 Info 493  [00:10:09.000] FileWatcher:: Close:: WatchInfo: /src/project/node_modules/pkg1/package.json 2000 undefined Project: /src/project/tsconfig.json WatchType: File location affecting resolution
-Info 494  [00:10:10.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 6 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 494  [00:10:10.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 6 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 495  [00:10:11.000] Project '/src/project/tsconfig.json' (Configured)
 Info 496  [00:10:12.000] 	Files (8)
 	/a/lib/lib.d.ts
@@ -2021,7 +2021,7 @@ Info 533  [00:11:06.000] File '/a/lib/package.json' does not exist according to
 Info 534  [00:11:07.000] File '/a/package.json' does not exist according to earlier cached lookups.
 Info 535  [00:11:08.000] File '/package.json' does not exist according to earlier cached lookups.
 Info 536  [00:11:09.000] FileWatcher:: Close:: WatchInfo: /src/project/node_modules/pkg3/package.json 2000 undefined Project: /src/project/tsconfig.json WatchType: File location affecting resolution
-Info 537  [00:11:10.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 7 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 537  [00:11:10.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 7 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 538  [00:11:11.000] Project '/src/project/tsconfig.json' (Configured)
 Info 539  [00:11:12.000] 	Files (6)
 	/a/lib/lib.d.ts
@@ -2188,7 +2188,7 @@ Info 599  [00:12:29.000] File '/package.json' does not exist according to earlie
 Info 600  [00:12:30.000] File '/a/lib/package.json' does not exist according to earlier cached lookups.
 Info 601  [00:12:31.000] File '/a/package.json' does not exist according to earlier cached lookups.
 Info 602  [00:12:32.000] File '/package.json' does not exist according to earlier cached lookups.
-Info 603  [00:12:33.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 8 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 603  [00:12:33.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 8 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 604  [00:12:34.000] Project '/src/project/tsconfig.json' (Configured)
 Info 605  [00:12:35.000] 	Files (5)
 	/a/lib/lib.d.ts
@@ -2338,7 +2338,7 @@ Info 652  [00:13:39.000] File '/package.json' does not exist according to earlie
 Info 653  [00:13:40.000] File '/a/lib/package.json' does not exist according to earlier cached lookups.
 Info 654  [00:13:41.000] File '/a/package.json' does not exist according to earlier cached lookups.
 Info 655  [00:13:42.000] File '/package.json' does not exist according to earlier cached lookups.
-Info 656  [00:13:43.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 9 structureChanged: true structureIsReused:: Not Elapsed:: *ms
+Info 656  [00:13:43.000] Finishing updateGraphWorker: Project: /src/project/tsconfig.json Version: 9 structureChanged: true structureIsReused:: SafeModuleCache Elapsed:: *ms
 Info 657  [00:13:44.000] Project '/src/project/tsconfig.json' (Configured)
 Info 658  [00:13:45.000] 	Files (4)
 	/a/lib/lib.d.ts