Simplify handling of node:-prefixed modules in auto-imports (#59702)

src/compiler/program.ts

@@ -75,6 +75,7 @@ import {
     ensureTrailingDirectorySeparator,
     equateStringsCaseInsensitive,
     equateStringsCaseSensitive,
+    exclusivelyPrefixedNodeCoreModules,
     explainIfFileIsRedirectAndImpliedFormat,
     ExportAssignment,
     ExportDeclaration,
@@ -323,6 +324,7 @@ import {
     TypeChecker,
     typeDirectiveIsEqualTo,
     TypeReferenceDirectiveResolutionCache,
+    unprefixedNodeCoreModules,
     VariableDeclaration,
     VariableStatement,
     Version,
@@ -1758,7 +1760,7 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
     let sourceFileToPackageName = new Map<Path, string>();
     // Key is a file name. Value is the (non-empty, or undefined) list of files that redirect to it.
     let redirectTargetsMap = createMultiMap<Path, string>();
-    let usesUriStyleNodeCoreModules = false;
+    let usesUriStyleNodeCoreModules: boolean | undefined;
 
     /**
      * map with
@@ -3499,7 +3501,14 @@ export function createProgram(rootNamesOrOptions: readonly string[] | CreateProg
                     setParentRecursive(node, /*incremental*/ false); // we need parent data on imports before the program is fully bound, so we ensure it's set here
                     imports = append(imports, moduleNameExpr);
                     if (!usesUriStyleNodeCoreModules && currentNodeModulesDepth === 0 && !file.isDeclarationFile) {
-                        usesUriStyleNodeCoreModules = startsWith(moduleNameExpr.text, "node:");
+                        if (startsWith(moduleNameExpr.text, "node:") && !exclusivelyPrefixedNodeCoreModules.has(moduleNameExpr.text)) {
+                            // Presence of `node:` prefix takes precedence over unprefixed node core modules
+                            usesUriStyleNodeCoreModules = true;
+                        }
+                        else if (usesUriStyleNodeCoreModules === undefined && unprefixedNodeCoreModules.has(moduleNameExpr.text)) {
+                            // Avoid `unprefixedNodeCoreModules.has` for every import
+                            usesUriStyleNodeCoreModules = false;
+                        }
                     }
                 }
             }