Add CodSpeed performance benchmarks and CI workflow #2

	name: CodSpeed

	on:
	push:
	branches:
	- main
	pull_request:
	# `workflow_dispatch` allows CodSpeed to trigger backtest
	# performance analysis in order to generate initial data.
	workflow_dispatch:

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	# Cancel a stale in-progress run when a PR gets pushed to again, but let
	# every push to main finish, since each one records a CodSpeed baseline.
	cancel-in-progress: ${{ github.event_name == 'pull_request' }}

	permissions:
	contents: read
	id-token: write # for OpenID Connect authentication with CodSpeed

	jobs:
	benchmarks:
	name: Run benchmarks
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- name: Setup Python
	uses: actions/setup-python@v5
	with:
	python-version: "3.12"

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -e .
	pip install pytest pytest-codspeed

	- name: Run benchmarks
	uses: CodSpeedHQ/action@v5
	with:
	mode: simulation
	run: pytest benchmarks/ --codspeed

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