codspeed.yml

name: CodSpeed

# Continuous performance gate: run the micro-benchmarks (benchmarks/test_perf.py) under CodSpeed's CPU
# simulation, which measures a deterministic instruction count rather than wall time, so a runner's noise
# never flakes it. CodSpeed compares each commit to the base and reports a pass/fail on the PR. A public
# repo uploads over OIDC (id-token), so no token secret is needed - only the CodSpeed GitHub App installed.

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
  workflow_dispatch:

permissions:
  contents: read

concurrency:
  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
  cancel-in-progress: true

jobs:
  benchmarks:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      id-token: write
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
        with:
          persist-credentials: false

      - name: Install uv
        uses: astral-sh/setup-uv@c771a70e6277c0a99b617c7a806ffedaca235ff9 # v9.0.0

      - name: Run benchmarks under CodSpeed
        uses: CodSpeedHQ/action@f22792bfac16f3e14eb9fbea76f4a48e9cc22b93 # v4.19.1
        with:
          mode: simulation
          run: uv run --locked --group benchmark pytest benchmarks/ --codspeed --no-cov