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Benchmark workflow (django/django)

The Benchmark workflow from django/django, explained and optimized by Latchkey.

A

CI health: A - excellent

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Source: django/django.github/workflows/benchmark.ymlLicense BSD-3-ClauseView source

What it does

This is the Benchmark workflow from the django/django repository, a real project running GitHub Actions. It is shown here with attribution under its BSD-3-Clause license.

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

The workflow

workflow (.yml)
name: Benchmark

on:
  pull_request:
    types: [ labeled, synchronize, opened, reopened ]

permissions:
   contents: read

jobs:
  Run_benchmarks:
    if: contains(github.event.pull_request.labels.*.name, 'benchmark')
    runs-on: ubuntu-latest
    timeout-minutes: 60
    steps:
      - name: Checkout Benchmark Repo
        uses: actions/checkout@v7
        with:
          repository: django/django-asv
          path: "."
          persist-credentials: false
      - name: Setup Miniforge
        # Pinned to v3.2.0.
        uses: conda-incubator/setup-miniconda@835234971496cad1653abb28a638a281cf32541f
        with:
          miniforge-version: "24.1.2-0"
          activate-environment: asv-bench
      - name: Install Requirements
        run: pip install -r requirements.txt
      - name: Cache Django
        uses: actions/cache@v6
        with:
          path: Django/*
          key: Django
      - name: Run Benchmarks
        shell: bash -l {0}
        run: |-
          asv machine --machine ubuntu-latest --yes > /dev/null
          echo 'Beginning benchmarks...'
          asv continuous --interleave-processes -a processes=2 --split --show-stderr 'HEAD^' 'HEAD' |\
          sed -n -E '/(before.*after.*ratio)|(BENCHMARKS)/,$p' >> out.txt
          echo 'Benchmarks Done.'
          echo '```' >> $GITHUB_STEP_SUMMARY
          cat out.txt >> $GITHUB_STEP_SUMMARY
          echo '```' >> $GITHUB_STEP_SUMMARY
          if grep -q "PERFORMANCE DECREASED" out.txt;
          then
            exit 1
          fi

The same workflow, on Latchkey

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

name: Benchmark
 
on:
  pull_request:
    types: [ labeled, synchronize, opened, reopened ]
 
permissions:
   contents: read
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  Run_benchmarks:
    if: contains(github.event.pull_request.labels.*.name, 'benchmark')
    runs-on: latchkey-small
    timeout-minutes: 60
    steps:
      - name: Checkout Benchmark Repo
        uses: actions/checkout@v7
        with:
          repository: django/django-asv
          path: "."
          persist-credentials: false
      - name: Setup Miniforge
        # Pinned to v3.2.0.
        uses: conda-incubator/setup-miniconda@835234971496cad1653abb28a638a281cf32541f
        with:
          miniforge-version: "24.1.2-0"
          activate-environment: asv-bench
      - name: Install Requirements
        run: pip install -r requirements.txt
      - name: Cache Django
        uses: actions/cache@v6
        with:
          path: Django/*
          key: Django
      - name: Run Benchmarks
        shell: bash -l {0}
        run: |-
          asv machine --machine ubuntu-latest --yes > /dev/null
          echo 'Beginning benchmarks...'
          asv continuous --interleave-processes -a processes=2 --split --show-stderr 'HEAD^' 'HEAD' |\
          sed -n -E '/(before.*after.*ratio)|(BENCHMARKS)/,$p' >> out.txt
          echo 'Benchmarks Done.'
          echo '```' >> $GITHUB_STEP_SUMMARY
          cat out.txt >> $GITHUB_STEP_SUMMARY
          echo '```' >> $GITHUB_STEP_SUMMARY
          if grep -q "PERFORMANCE DECREASED" out.txt;
          then
            exit 1
          fi

What changed

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:

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

actions/checkout actions/cache