module resolution benchmarks

benchmarks.mjs

import { build } from 'esbuild'

import typescript from '@rollup/plugin-typescript'

export async function esbuildResolve(id, dir) {
  let result

  await build({
    stdin: {
      contents: `import ${JSON.stringify(id)}`,
      resolveDir: dir,
    },
    write: false,
    bundle: true,
    treeShaking: false,
    ignoreAnnotations: true,
    platform: 'node',
    plugins: [{
      name: 'resolve',
      setup({ onLoad }) {
        onLoad({ filter: /.*/ }, (args) => {
          result = args.path
          return { contents: '' }
        })
      },
    }],
  })
  return result
}

(async () => {
  let ops = 0
  let time = Date.now()
  while (true) {
    await esbuildResolve('./dummy', '.')
    ops++
    if (Date.now() - time > 1000) {
      break;
    }
  }
  console.log('esbuildResolve:', ops, '/sec')

  ops = 0
  time = Date.now()

  const ts = typescript();
  while (true) {
    ts.resolveId('./dummy', '/Users/chenyuwang/esno/esbuild-node-loader/dummy.ts')
    if (Date.now() - time > 1000) {
      break;
    }
    ops++
  }
  console.log('typescript resolveId (cached):', ops, '/sec')


  ops = 0
  time = Date.now()

  while (true) {
    const ts = typescript({});
    ts.resolveId('./dummy', '/Users/chenyuwang/esno/esbuild-node-loader/dummy.ts')
    if (Date.now() - time > 1000) {
      break;
    }
    ops++
  }
  console.log('typescript resolveId (not-cached):', ops, '/sec')
})()