chore(ci): run perf testing on release branches #1

	name: Run Perf benchmarks

	on:
	push:
	branches:
	- winter*
	- spring*
	- summer*
	- wjh/perf-ci # Just for testing

	jobs:
	run-performance-tests:
	# It is important to use this image so that we have a consistent IP address
	runs-on: salesforce-Ubuntu
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Setup Node
	uses: actions/setup-node@v4
	with:
	node-version: '20.18.1'
	cache: 'yarn'

	- name: Install dependencies
	run: yarn install --frozen-lockfile

	- name: Get Previous Release
	id: previous_release
	run: \|
	# Parse current season and year
	[[ $release =~ ^(winter\|spring\|summer)([0-9]+)$ ]]
	season="${BASH_REMATCH[1]}"
	year="${BASH_REMATCH[2]}"

	# Get previous season and year
	case $season in
	winter) PREVIOUS="summer$((year - 1))";;
	spring) PREVIOUS="winter$year";;
	summer) PREVIOUS="spring$year";;
	*) PREVIOUS="master";; # Just for testing
	esac
	# Expose to GitHub Actions
	echo "branch=$PREVIOUS" >> "$GITHUB_OUTPUT"

	- name: Build benchmarks
	env:
	BENCHMARK_REF: ${{steps.previous_release.outputs.branch}}
	run: yarn build:performance

	- name: Run benchmarks
	working-directory: ./packages/@lwc/perf-benchmarks
	env:
	BENCHMARK_REF: ${{steps.previous_release.outputs.branch}}
	run: yarn test:run

	- name: Format results
	working-directory: ./packages/@lwc/perf-benchmarks
	run: yarn --silent test:format >> "$GITHUB_STEP_SUMMARY"

Provide feedback