benchmark.yml

name: Bechmark

on:
  pull_request:

jobs:
  benchmark:
    name: Benchmark
    runs-on: ubuntu-latest
    steps:
      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: ^1.17

      - name: Git clone (master)
        uses: actions/checkout@v4
        with:
          ref: master

      - name: Run benchmark (master)
        run: go test -bench=. -count=10 -benchmem | tee /tmp/master.txt

      - name: Git clone (PR)
        uses: actions/checkout@v4

      - name: Run benchmark (PR)
        run: go test -bench=. -count=10 -benchmem | tee /tmp/pr.txt

      - name: Install benchstat
        run: go install golang.org/x/perf/cmd/benchstat@latest

      - name: Run benchstat
        run: cd /tmp && benchstat master.txt pr.txt | tee /tmp/result.txt

      - name: Comment on PR with benchmark results
        uses: actions/github-script@v6
        with:
          script: |
            const fs = require('fs');
            const results = fs.readFileSync('/tmp/result.txt', 'utf8');
            const issue_number = context.payload.pull_request.number;
            const { owner, repo } = context.repo;

            await github.rest.issues.createComment({
              owner,
              repo,
              issue_number,
              body: `### Benchmark Results\n\n\`\`\`\n${results}\n\`\`\``
            });