diff --git a/packages/angular/build/src/builders/application/chunk-optimizer.ts b/packages/angular/build/src/builders/application/chunk-optimizer.ts
index ea4c2f8076f9..db3e1d2f180d 100644
--- a/packages/angular/build/src/builders/application/chunk-optimizer.ts
+++ b/packages/angular/build/src/builders/application/chunk-optimizer.ts
@@ -113,11 +113,15 @@ function bundleOutputToEsbuildMetafile(
           continue;
         }
 
+        // Read once per module: in Rolldown, `renderedLength` is an uncached getter that
+        // copies the entire module code across the NAPI bridge on each access.
+        const { renderedLength } = renderedModule;
+        
         for (const [originalInputPath, originalInputInfo] of Object.entries(
           originalOutputEntry.inputs,
         )) {
           const proportion = originalInputInfo.bytesInOutput / totalOriginalBytesInModule;
-          const newBytesInOutput = Math.floor(renderedModule.renderedLength * proportion);
+          const newBytesInOutput = Math.floor(renderedLength * proportion);
 
           const existing = newOutputInputs[originalInputPath];
           if (existing) {