bench.yml

name: Benchstat

on:
  pull_request:
    branches: [ master ]

permissions:  # added using https://github.com/step-security/secure-workflows
  contents: read

jobs:

  bench:
    name: Performance regression check
    runs-on: ubuntu-latest
    steps:
      - name: Checkout (previous)
        uses: actions/checkout@v3
        with:
          ref: ${{ github.base_ref }}
          path: previous

      - name: Checkout (new)
        uses: actions/checkout@v3
        with:
          path: new

      - name: Set up Go
        uses: actions/setup-go@v4
        with:
          go-version-file: '${{ github.workspace }}/go.mod'

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

      - name: Run Benchmark (previous)
        run: |
          cd previous
          go test -bench=. -benchmem -benchtime=100ms -count=8 > benchmark.txt

      - name: Run Benchmark (new)
        run: |
          cd new
          go test -bench=. -benchmem -benchtime=100ms -count=8 > benchmark.txt

      - name: Run Benchstat
        run: benchstat previous/benchmark.txt new/benchmark.txt