Micro-optimization #16

	name: Benchmarks

	on:
	push:
	branches:
	- master
	pull_request:
	branches:
	- master

	jobs:
	benchmark:
	name: Benchmarks
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v5

	- name: Install uv
	uses: astral-sh/setup-uv@v6

	- name: Set up Python 3.14
	uses: actions/setup-python@v5
	with:
	python-version: '3.14'

	- name: Install dependencies
	run: uv sync

	# Restore benchmark baseline (read-only for PRs)
	- name: Restore benchmark baseline
	uses: actions/cache/restore@v4
	with:
	path: .benchmarks
	key: benchmark-baseline-3.14-${{ runner.os }}

	# On master: save baseline results
	- name: Run benchmarks and save baseline
	if: github.ref == 'refs/heads/master'
	continue-on-error: true
	run: \|
	uv run --no-sync pytest benchmarks/benchmark.py \
	--benchmark-only \
	--benchmark-autosave \
	--benchmark-sort=name

	# On master: cache the new baseline results
	- name: Save benchmark baseline
	if: github.ref == 'refs/heads/master'
	uses: actions/cache/save@v4
	with:
	path: .benchmarks
	key: benchmark-baseline-3.14-${{ runner.os }}

	# On PRs: compare against baseline and fail if degraded
	- name: Run benchmarks and compare
	if: github.event_name == 'pull_request'
	run: \|
	if [ -z "$(uv run --no-sync pytest-benchmark list)" ]; then
	echo "No baseline found, not comparing"
	uv run --no-sync pytest -v benchmarks/benchmark.py
	exit
	fi

	uv run --no-sync pytest benchmarks/benchmark.py \
	--benchmark-only \
	--benchmark-compare \
	--benchmark-compare-fail=mean:5% \
	--benchmark-sort=name

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