name: CI Benchmark

on:
  push:
    branches:
      - master
  pull_request:
    branches:
      - master
  workflow_dispatch:

permissions:
  contents: read

jobs:
  benchmark:
    strategy:
      fail-fast: false
      matrix:
        runner:
          - ubuntu-latest
          - monkci-runners-4vcpu
          - monkci-ubuntu-24.04-4-3600iops
    name: Benchmark @ ${{ matrix.runner }}
    runs-on: ${{ matrix.runner }}
    env:
      GO111MODULE: on
      GOPROXY: https://proxy.golang.org

    steps:
      - name: Checkout Code
        uses: actions/checkout@v4
        with:
          ref: ${{ github.ref }}

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version: "^1"
          cache: true

      - name: Run Benchmarks
        run: go test -bench=. -benchmem -benchtime=3s ./...

      - name: Upload Benchmark Results
        uses: actions/upload-artifact@v4
        with:
          name: benchmark-results-${{ matrix.runner }}
          path: benchmark-results-${{ matrix.runner }}.txt
          if-no-files-found: ignore

  compare:
    needs: benchmark
    runs-on: ubuntu-latest
    name: Compare Benchmark Results
    steps:
      - name: Download all benchmark artifacts
        uses: actions/download-artifact@v4
        with:
          pattern: benchmark-results-*
          merge-multiple: true

      - name: Display Results
        run: |
          echo "===== Benchmark Comparison ====="
          for f in benchmark-results-*.txt; do
            echo ""
            echo "----- Runner: ${f} -----"
            cat "$f" || echo "(no results)"
          done