refactor(@angular-devkit/build-angular): add initial support for parallel TS/NG compilation #25991
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…llel TS/NG compilation By default Angular compilations will now use a Node.js Worker thread to load and execute the TypeScript and Angular compilers when using esbuild-based builders (`application`/`browser-esbuild`). This allows for longer synchronous actions such as semantic and template diagnostics to be calculated in parallel to the other aspects of the application bundling process. The worker thread also has a separate memory pool which significantly reduces the need for adjusting the main Node.js CLI process memory settings with large application code sizes. This can be disabled via the `NG_BUILD_PARALLEL_TS` environment variable currently to support performance benchmarking. However, this is an unsupported environment variable option and may be removed in a future version.
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By default Angular compilations will now use a Node.js Worker thread to load and execute the
TypeScript and Angular compilers when using esbuild-based builders (
application/browser-esbuild).This allows for longer synchronous actions such as semantic and template diagnostics to be calculated
in parallel to the other aspects of the application bundling process. The worker thread also has
a separate memory pool which significantly reduces the need for adjusting the main Node.js CLI process
memory settings with large application code sizes. This can be disabled via the
NG_BUILD_PARALLEL_TSenvironment variable currently to support performance benchmarking. However, this is an unsupported
environment variable option and may be removed in a future version.