feat(vitest-runner): add first implementation

[adriencaccia]

No description provided.

[codspeed-hq]

CodSpeed Performance Report

Merging #26 will create unknown performance changes

_{Comparing feat/vitest-runner (161e9e3) with main (7f00e39)}

Summary

🆕 2 new benchmarks
⁉️ 64 dropped benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	feat/vitest-runner	Change
🆕	short body	N/A	502.7 µs	N/A
🆕	long body	N/A	1.4 ms	N/A
⁉️	RegExp#test	20.5 µs	N/A	N/A
⁉️	String#indexOf	14.3 µs	N/A	N/A
⁉️	test_recursive_fibo_20	18.5 ms	N/A	N/A
⁉️	test_recursive_cached_fibo_30	152.6 µs	N/A	N/A
⁉️	switch 2	17.8 µs	N/A	N/A
⁉️	test_recursive_fibo_10	170.6 µs	N/A	N/A
⁉️	test_recursive_cached_fibo_20	106.4 µs	N/A	N/A
⁉️	switch 2	17.7 µs	N/A	N/A
⁉️	switch 1	316.5 µs	N/A	N/A
⁉️	test async baz 10	1.7 ms	N/A	N/A
⁉️	test_iterative_fibo_100	74.6 µs	N/A	N/A
⁉️	test_recursive_cached_fibo_10	68.5 µs	N/A	N/A
⁉️	test sync baz 10	40.9 µs	N/A	N/A
⁉️	test_iterative_fibo_10	43.2 µs	N/A	N/A
⁉️	test_iterative_fibo_10	43.2 µs	N/A	N/A
⁉️	test_recursive_fibo_10	467.7 µs	N/A	N/A
⁉️	test_recursive_fibo_20	18.5 ms	N/A	N/A
⁉️	test async baz 100	1.7 ms	N/A	N/A
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

[codspeed-adrien-dev]

CodSpeed Performance Report

Merging #26 will improve performances by ×7

_{⚠️ No base runs were found}

_{Falling back to comparing feat/vitest-runner (a9eaac7) with main (67a4f23)}

🎉 Hooray! codspeed-node just leveled up to 2.2.0!

A heads-up, this is a breaking change and it might affect your current performance baseline a bit. But here's the exciting part - it's packed with new, cool features and promises improved result stability 🥳!
Curious about what's new? Visit our releases page to delve into all the awesome details about this new version.

Summary

⚡ 4 improvements

🆕 80 new benchmarks

Benchmarks breakdown

	Benchmark	main	feat/vitest-runner	Change
⚡	String#indexOf	135.5 µs	14.2 µs	×9.5
⚡	switch 2	172.4 µs	17.6 µs	×9.8
⚡	switch 1	155.2 µs	17 µs	×9.1
🆕	long body	N/A	1.4 ms	N/A
🆕	short body 2	N/A	481.8 µs	N/A
🆕	short body	N/A	502.7 µs	N/A
🆕	long body	N/A	1.6 ms	N/A
🆕	short body	N/A	262.3 µs	N/A
⚡	RegExp#test	142.5 µs	20.5 µs	×7
🆕	short body 4	N/A	497.7 µs	N/A
🆕	long body	N/A	1.4 ms	N/A
🆕	short body	N/A	234.7 µs	N/A
🆕	short body 5	N/A	222.8 µs	N/A
🆕	short body	N/A	502.9 µs	N/A
🆕	short body	N/A	500.5 µs	N/A
🆕	test_recursive_fibo_10	N/A	170.7 µs	N/A
🆕	fibo 10	N/A	161.8 µs	N/A
🆕	long body	N/A	1.4 ms	N/A
🆕	short body	N/A	388.5 µs	N/A
🆕	switch 1	N/A	17 µs	N/A
...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

[sheremet-va]

I would recommend implementing this as a plugin since this is how config is usually modified in the ecosystem:

// vitest.config.ts
import { CodeSpeedPlugin } from '@codespeed/vitest-runner'
import { defineConfig } from 'vitest/config'

export default defineConfig((mode) => ({
  plugins: [mode === 'benchmark' ? CodeSpeedPlugin() : null]
}))

// plugin.ts
export default () => {
  return {
    name: 'codespeed:vitest'
    config() {
      // you don't need to merge it yourself, just return modified version
      return {
        test: {
          poolOptions: {
          forks: {
              // eslint-disable-next-line @typescript-eslint/ban-ts-comment
              // @ts-ignore - remove when https://github.com/vitest-dev/vitest/pull/4383 is merged and released
              execArgv: getV8Flags(),
            },
          },
          runner: `${__dirname}/runner.es5.js`,
          globalSetup: [
            `${__dirname}/globalSetup.es5.js`,
          ],
        }
      }
    }
  }
}

[adriencaccia]

Thanks for the suggestion, I implemented it in the new PR #28