test: add tinybench benchmarks and CodSpeed CI #3

	name: CodSpeed

	on:
	push:
	branches: [main]
	pull_request:
	branches: [main]
	# Allow manual runs from the Actions tab.
	workflow_dispatch:

	permissions:
	contents: read # to fetch code (actions/checkout)

	jobs:
	benchmarks:
	name: Run benchmarks
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
	with:
	fetch-depth: 0

	- name: Use Node.js
	uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
	with:
	node-version: lts/*
	cache: npm

	- name: Install dependencies
	run: npm ci

	- name: Run benchmarks and upload to CodSpeed
	uses: CodSpeedHQ/action@v3
	with:
	# Run all benchmark files. CodSpeed instruments them automatically
	# via @codspeed/tinybench-plugin, which is wired up in benchmarks/helpers.js.
	run: npm run bench
	token: ${{ secrets.CODSPEED_TOKEN }}

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