From 15e442a0c8e059922824fe123d07ed236a171927 Mon Sep 17 00:00:00 2001
From: Charles Lyding <19598772+clydin@users.noreply.github.com>
Date: Tue, 23 Jun 2026 10:32:20 -0400
Subject: [PATCH] perf(@angular/build): dispose builder result context early in
 non-watch mode

Evaluates and extracts final output results into a list before calling result.dispose() in non-watch mode. This ensures all compiler worker processes (retaining the TypeScript program structures and cache) are terminated and reclaimed before yielding results to the caller for disk writing.
---
 .../build/src/builders/application/build-action.ts        | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/packages/angular/build/src/builders/application/build-action.ts b/packages/angular/build/src/builders/application/build-action.ts
index 77d1f16cbd2a..d7dbdc8cfe21 100644
--- a/packages/angular/build/src/builders/application/build-action.ts
+++ b/packages/angular/build/src/builders/application/build-action.ts
@@ -148,7 +148,13 @@ export async function* runEsBuildBuildAction(
     // Output the first build results after setting up the watcher to ensure that any code executed
     // higher in the iterator call stack will trigger the watcher. This is particularly relevant for
     // unit tests which execute the builder and modify the file system programmatically.
-    yield* emitOutputResults(result, outputOptions);
+    const outputResults = [...emitOutputResults(result, outputOptions)];
+    if (!watch) {
+      await result.dispose();
+      // Set to true to prevent double-disposal of the result context in the finally block on generator exit
+      watchLoopStarted = true;
+    }
+    yield* outputResults;
 
     // Finish if watch mode is not enabled
     if (!watcher) {