fixup! perf(@angular/build): cache transformed configuration in TypeScript compilation

Author: alan-agius4

packages/angular/build/src/tools/angular/compilation/typescript-compilation.ts

@@ -135,28 +135,30 @@ export abstract class TypeScriptCompilation extends AngularCompilation {
       const posixFile = toPosixPath(file);
       this.sourceFiles.delete(posixFile);
 
-      if (this.#extendedConfigCache.size) {
-        let cacheKey: string | undefined;
-        if (this.#extendedConfigCache.has(posixFile)) {
-          cacheKey = posixFile;
-        } else {
-          // Check with lowercased key because TypeScript lowercases the keys
-          // of the extended config cache on case-insensitive operating systems.
-          const lowerCasedPosixFile = posixFile.toLowerCase();
-          if (this.#extendedConfigCache.has(lowerCasedPosixFile)) {
-            cacheKey = lowerCasedPosixFile;
-          }
-        }
+      if (!this.#extendedConfigCache.size) {
+        continue;
+      }
 
-        if (!cacheKey) {
-          continue;
+      let cacheKey: string | undefined;
+      if (this.#extendedConfigCache.has(posixFile)) {
+        cacheKey = posixFile;
+      } else {
+        // Check with lowercased key because TypeScript lowercases the keys
+        // of the extended config cache on case-insensitive operating systems.
+        const lowerCasedPosixFile = posixFile.toLowerCase();
+        if (this.#extendedConfigCache.has(lowerCasedPosixFile)) {
+          cacheKey = lowerCasedPosixFile;
         }
+      }
 
-        // If a tsconfig changes, we need to re-read the configuration.
-        this.#cachedConfiguration = undefined;
-        this.#cachedRootFiles = undefined;
-        this.#extendedConfigCache.delete(cacheKey);
+      if (!cacheKey) {
+        continue;
       }
+
+      // If a tsconfig changes, we need to re-read the configuration.
+      this.#cachedConfiguration = undefined;
+      this.#cachedRootFiles = undefined;
+      this.#extendedConfigCache.delete(cacheKey);
     }
   }