bench.yml

name: Benchmark

on:
  pull_request:
    paths:
      - 'bench/**'
      - 'server/src/storage/**'
      - '.github/workflows/bench.yml'
      # The image decides which build an operator actually runs, so a change to
      # it has to bring its own numbers.
      - 'Dockerfile'
      - 'Cargo.toml'
  workflow_dispatch:

permissions:
  contents: read

jobs:
  throughput:
    # Both builds, because the image ships musl and musl allocates differently
    # under threads. Reading one number and shipping the other is how a
    # regression gets published as a measurement.
    name: Throughput (${{ matrix.name }})
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - name: host
            target: ''
          - name: musl
            target: x86_64-unknown-linux-musl
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
        with:
          persist-credentials: false

      - name: Cache cargo
        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
        with:
          path: |
            ~/.cargo/registry
            ~/.cargo/git
            target
          key: ${{ runner.os }}-cargo-bench-${{ matrix.name }}-${{ hashFiles('Cargo.lock') }}
          restore-keys: ${{ runner.os }}-cargo-bench-${{ matrix.name }}-

      # ring and zstd are C, so a musl build needs a musl C compiler. cc-rs
      # picks up musl-gcc on its own once it is on the path.
      - name: Install the musl toolchain
        if: matrix.target != ''
        run: sudo apt-get update && sudo apt-get install -y --no-install-recommends musl-tools

      - name: Measure
        env:
          LARGE_MIB: '1024'
          SMALL_COUNT: '1000'
          TARGET: ${{ matrix.target }}
        run: |
          set -o pipefail
          bash bench/throughput.sh | tee "$GITHUB_STEP_SUMMARY"