Persist benchmark results in CI #44

	name: Benchmark
	on:
	# For testing, remove before merge:
	pull_request:
	push:
	branches:
	- main
	permissions:
	contents: read
	packages: read
	jobs:
	benchmark:
	name: 'benchmark (pg: ${{ matrix.pgVersion }})'
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	pgVersion: ['14.8', '15.3', '16.4', '17.0' ,'latest']
	steps:
	- uses: actions/checkout@v4

	- name: Set up Go
	uses: actions/setup-go@v5
	with:
	go-version-file: 'go.mod'

	- name: Run benchmarks
	run: make bench
	env:
	POSTGRES_VERSION: ${{ matrix.pgVersion }}

	- name: Upload results
	uses: actions/upload-artifact@v4
	with:
	name: benchmark_result_${{ matrix.pgVersion }}.json
	path: internal/benchmarks/benchmark_result_${{ matrix.pgVersion }}.json

	gather:
	name: 'Gather results'
	runs-on: ubuntu-latest
	needs: [benchmark]

	steps:
	- uses: actions/download-artifact@v4
	with:
	path: ./results/
	merge-multiple: true

	- name: Combine all results
	run: cat results/*.json > ${{github.sha}}_benchmark_result.json

	- name: Upload combined results
	uses: actions/upload-artifact@v4
	with:
	name: ${{github.sha}}_benchmark_result.json
	path: ${{github.sha}}_benchmark_result.json

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