foundry-gas-diff.yml

name: Report gas diff

on:
  push:
    branches:
      - main
  pull_request:
    # Run only for changes in specific files.
     paths:
     - contracts/**
     - foundry.toml
     - .github/workflows/foundry-gas-diff.yml
  workflow_dispatch:

jobs:
  compare_gas_reports:
    runs-on: ubuntu-latest
    defaults:
      run:
        working-directory: ./contracts

    steps:
      - uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Install Foundry
        uses: foundry-rs/foundry-toolchain@v1.2.0

      - name: Run tests
        run: forge test --gas-report > ../gasreport.ansi # <- this file name should be unique in your repository!
        env:
          # make fuzzing semi-deterministic to avoid noisy gas cost estimation
          # due to non-deterministic fuzzing (but still use pseudo-random fuzzing seeds)
          FOUNDRY_FUZZ_SEED: 0x${{ github.event.pull_request.base.sha || github.sha }}

      - name: Compare gas reports
        uses: Rubilmax/foundry-gas-diff@v3.16
        with:
          summaryQuantile: 0.9 # only display the 10% most significant gas diffs in the summary (defaults to 20%)
          sortCriteria: avg,max # sort diff rows by criteria
          sortOrders: desc,asc # and directions
          ignore: test-foundry/**/* # filter out gas reports from specific paths (test/ is included by default)
        id: gas_diff

      - name: Add gas diff to sticky comment
        if: github.event_name == 'pull_request' || github.event_name == 'pull_request_target'
        uses: marocchino/sticky-pull-request-comment@v2
        with:
          # delete the comment in case changes no longer impact gas costs
          delete: ${{ !steps.gas_diff.outputs.markdown }}
          message: ${{ steps.gas_diff.outputs.markdown }}