chore(ci): Generate circuit benchmark summaries on PRs

.github/workflows/gates_report.yml

@@ -0,0 +1,90 @@
+name: Report gates diff
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+jobs:
+  build-nargo:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        target: [x86_64-unknown-linux-gnu]
+
+    steps:
+      - name: Checkout Noir repo
+        uses: actions/checkout@v4
+
+      - name: Setup toolchain
+        uses: dtolnay/rust-toolchain@1.66.0
+
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: ${{ matrix.target }}
+          cache-on-failure: true
+          save-if: ${{ github.event_name != 'merge_group' }}
+
+      - name: Build Nargo
+        run: cargo build --package nargo_cli --release
+
+      - name: Package artifacts
+        run: |
+          mkdir dist
+          cp ./target/release/nargo ./dist/nargo
+          7z a -ttar -so -an ./dist/* | 7z a -si ./nargo-x86_64-unknown-linux-gnu.tar.gz
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v3
+        with:
+          name: nargo
+          path: ./dist/*
+          retention-days: 3
+
+
+  compare_gas_reports:
+    needs: [build-nargo]
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          submodules: recursive
+
+      - name: Download nargo binary
+        uses: actions/download-artifact@v3
+        with:
+          name: nargo
+          path: ./nargo
+
+      - name: Set nargo on PATH
+        run: |
+          nargo_binary="${{ github.workspace }}/nargo/nargo"
+          chmod +x $nargo_binary
+          echo "$(dirname $nargo_binary)" >> $GITHUB_PATH
+          export PATH="$PATH:$(dirname $nargo_binary)"
+          nargo -V
+
+      - name: Generate gates report
+        working-directory: ./tooling/nargo_cli/tests
+        run: |
+          ./gates_report.sh
+          mv gates_report.json ../../../gates_report.json
+
+      - name: Compare gates reports
+        id: gates_diff
+        uses: TomAFrench/noir-gates-diff@e7cf131b7e7f044c01615f93f0b855f65ddc02d4
+        with:
+          report: gates_report.json
+          summaryQuantile: 0.9 # only display the 10% most significant circuit size diffs in the summary (defaults to 20%)
+
+      - name: Add gates 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 circuit sizes
+          delete: ${{ !steps.gates_diff.outputs.markdown }}
+          message: ${{ steps.gates_diff.outputs.markdown }}

.gitignore

@@ -40,6 +40,9 @@ result
 !tooling/nargo_cli/tests/acir_artifacts/*/target
 !tooling/nargo_cli/tests/acir_artifacts/*/target/witness.gz
 !compiler/wasm/noir-script/target
+
+gates_report.json
+
 # Github Actions scratch space
 # This gives a location to download artifacts into the repository in CI without making git dirty.
 libbarretenberg-wasm32

cspell.json

@@ -88,6 +88,7 @@
         "prettytable",
         "printstd",
         "pseudocode",
+        "quantile",
         "rustc",
         "rustup",
         "schnorr",

tooling/nargo_cli/Cargo.toml

@@ -37,7 +37,7 @@ toml.workspace = true
 serde.workspace = true
 serde_json.workspace = true
 prettytable-rs = "0.10"
-rayon = "1.7.0"
+rayon = "1.8.0"
 thiserror.workspace = true
 tower.workspace = true
 async-lsp = { version = "0.0.5", default-features = false, features = [

tooling/nargo_cli/tests/gates_report.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+set -e
+
+# These tests are incompatible with gas reporting
+excluded_dirs=("workspace" "workspace_default_member")
+
+# These tests cause failures in CI with a stack overflow for some reason.
+ci_excluded_dirs=("eddsa")
+
+current_dir=$(pwd)
+base_path="$current_dir/execution_success"
+test_dirs=$(ls $base_path)
+
+# We generate a Noir workspace which contains all of the test cases
+# This allows us to generate a gates report using `nargo info` for all of them at once.
+
+echo "[workspace]" > Nargo.toml
+echo "members = [" >> Nargo.toml
+
+for dir in $test_dirs; do
+    if [[ " ${excluded_dirs[@]} " =~ " ${dir} " ]]; then
+      continue
+    fi
+
+    if [[ ${CI-false} = "true" ]] && [[ " ${ci_excluded_dirs[@]} " =~ " ${dir} " ]]; then
+      continue
+    fi
+
+    echo "  \"execution_success/$dir\"," >> Nargo.toml
+done
+
+echo "]" >> Nargo.toml
+
+nargo info --json > gates_report.json
+
+rm Nargo.toml