perf: replace String and Array indexOf method calls with includes method call (#55482)

src/server/editorServices.ts

@@ -4093,7 +4093,7 @@ export class ProjectService {
                         for (const type of rule.types) {
                             // Best-effort de-duping here - doesn't need to be unduplicated but
                             // we don't want the list to become a 400-element array of just 'kendo'
-                            if (typeAcqInclude.indexOf(type) < 0) {
+                            if (!typeAcqInclude.includes(type)) {
                                 typeAcqInclude.push(type);
                             }
                         }
@@ -4118,7 +4118,7 @@ export class ProjectService {
                                 }).join("");
                             });
 
-                            if (excludeRules.indexOf(processedRule) === -1) {
+                            if (!excludeRules.includes(processedRule)) {
                                 excludeRules.push(processedRule);
                             }
                         }
@@ -4126,7 +4126,7 @@ export class ProjectService {
                     else {
                         // If not rules listed, add the default rule to exclude the matched file
                         const escaped = ProjectService.escapeFilenameForRegex(root);
-                        if (excludeRules.indexOf(escaped) < 0) {
+                        if (!excludeRules.includes(escaped)) {
                             excludeRules.push(escaped);
                         }
                     }
@@ -4155,7 +4155,7 @@ export class ProjectService {
                             exclude = true;
                             // ... but *include* it in the list of types to acquire
                             // Same best-effort dedupe as above
-                            if (typeAcqInclude.indexOf(typeName) < 0) {
+                            if (!typeAcqInclude.includes(typeName)) {
                                 typeAcqInclude.push(typeName);
                             }
                         }

src/server/project.ts

@@ -1503,7 +1503,7 @@ export abstract class Project implements LanguageServiceHost, ModuleResolutionHo
 
     protected removeExistingTypings(include: string[]): string[] {
         const existing = getAutomaticTypeDirectiveNames(this.getCompilerOptions(), this.directoryStructureHost);
-        return include.filter(i => existing.indexOf(i) < 0);
+        return include.filter(i => !existing.includes(i));
     }
 
     private updateGraphWorker() {

src/server/scriptInfo.ts

@@ -31,7 +31,6 @@ import {
     some,
     SourceFile,
     SourceFileLike,
-    stringContains,
     TextSpan,
     unorderedRemoveItem,
 } from "./_namespaces/ts";
@@ -339,9 +338,9 @@ export class TextStorage {
 
 export function isDynamicFileName(fileName: NormalizedPath) {
     return fileName[0] === "^" ||
-        ((stringContains(fileName, "walkThroughSnippet:/") || stringContains(fileName, "untitled:/")) &&
+        ((fileName.includes("walkThroughSnippet:/") || fileName.includes("untitled:/")) &&
             getBaseFileName(fileName)[0] === "^") ||
-        (stringContains(fileName, ":^") && !stringContains(fileName, directorySeparator));
+        (fileName.includes(":^") && !fileName.includes(directorySeparator));
 }
 
 /** @internal */

src/server/session.ts

@@ -124,7 +124,6 @@ import {
     some,
     SourceFile,
     startsWith,
-    stringContains,
     SymbolDisplayPart,
     SyntaxKind,
     TextChange,
@@ -2960,7 +2959,7 @@ export class Session<TMessage = string> implements EventSender {
         }
 
         // No need to analyze lib.d.ts
-        const fileNamesInProject = fileNames!.filter(value => !stringContains(value, "lib.d.ts")); // TODO: GH#18217
+        const fileNamesInProject = fileNames!.filter(value => !value.includes("lib.d.ts")); // TODO: GH#18217
         if (fileNamesInProject.length === 0) {
             return;
         }