CodSpeed Benchmarks workflow (aio-libs/async-lru)

The CodSpeed Benchmarks workflow from aio-libs/async-lru, explained and optimized by Latchkey.

What it does

This is the CodSpeed Benchmarks workflow from the aio-libs/async-lru repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

name: CodSpeed Benchmarks

on:
  push:
    branches:
      - master
      - '[0-9].[0-9]+'
  pull_request:
    branches:
      - master
      - '[0-9].[0-9]+'

jobs:
  benchmark:
    name: Run CodSpeed Benchmarks (Python ${{ matrix.python-version }})
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v6

      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: '3.13'
          cache: 'pip'
          cache-dependency-path: '**/requirements*.txt'

      - name: Install dependencies
        run: pip install -r requirements-benchmarks.txt

      - name: Create empty pytest config
        run: echo "[pytest]" > .empty-pytest.ini

      - name: Run the benchmarks
        uses: CodSpeedHQ/action@v4
        with:
          mode: instrumentation
          run: pytest -c .empty-pytest.ini --codspeed benchmark.py --timeout=0
          token: ${{ secrets.CODSPEED_TOKEN }}

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

name: CodSpeed Benchmarks
 
on:
  push:
    branches:
      - master
      - '[0-9].[0-9]+'
  pull_request:
    branches:
      - master
      - '[0-9].[0-9]+'
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  benchmark:
    timeout-minutes: 30
    name: Run CodSpeed Benchmarks (Python ${{ matrix.python-version }})
    runs-on: latchkey-small
    steps:
      - name: Checkout code
        uses: actions/checkout@v6
 
      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: '3.13'
          cache: 'pip'
          cache-dependency-path: '**/requirements*.txt'
 
      - name: Install dependencies
        run: pip install -r requirements-benchmarks.txt
 
      - name: Create empty pytest config
        run: echo "[pytest]" > .empty-pytest.ini
 
      - name: Run the benchmarks
        uses: CodSpeedHQ/action@v4
        with:
          mode: instrumentation
          run: pytest -c .empty-pytest.ini --codspeed benchmark.py --timeout=0
          token: ${{ secrets.CODSPEED_TOKEN }}
 

What changed

• Run on Latchkey managed runners with one line (runs-on), which apply the fixes below automatically and self-heal transient failures. This example uses latchkey-small; pick the runner size that fits the job.
• Cancel superseded runs when a branch or PR gets a newer push.
• Add a job timeout so a hung step cannot burn hours of runner time.

1 third-party action is referenced by a movable tag. Pin it to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.

What Latchkey heals here

This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:

• Dependency installs

This workflow runs 1 job per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow