fix(perf): enable compile cache if present (#7901)

H4ad · web-flow · commit e19bff0ece79 · 2024-11-20T14:53:12.000-08:00
Adding support to [module.enableCompileCache](https://nodejs.org/docs/v22.11.0/api/module.html#moduleenablecompilecachecachedir), added by nodejs/node#54501, Typescript got [2.5x perf on tsc](https://devblogs.microsoft.com/typescript/announcing-typescript-5-7-beta/#support-for-v8-compile-caching-in-node.js). On my machine, for the command `--version`, I got the following results: ```bash Benchmark 1: node bin/npm-cli.js --version Time (mean ± σ): 58.0 ms ± 1.1 ms [User: 51.8 ms, System: 16.8 ms] Range (min … max): 56.5 ms … 62.6 ms 51 runs Benchmark 2: node bin/npm-cli-with-cache.js --version Time (mean ± σ): 52.9 ms ± 1.0 ms [User: 46.5 ms, System: 16.8 ms] Range (min … max): 51.4 ms … 55.5 ms 56 runs Summary 'node bin/npm-cli-with-cache.js --version' ran 1.10 ± 0.03 times faster than 'node bin/npm-cli.js --version' ``` I run the same test with `npm run empty` and I got the same 10% improvement.
diff --git a/lib/cli.js b/lib/cli.js
@@ -1,3 +1,11 @@
+try {
+  const { enableCompileCache } = require('node:module')
+  /* istanbul ignore next */
+  if (enableCompileCache) {
+    enableCompileCache()
+  }
+} catch (e) { /* istanbul ignore next */ }
+
 const validateEngines = require('./cli/validate-engines.js')
 const cliEntry = require('node:path').resolve(__dirname, 'cli/entry.js')
 
