chore: adding benchmarking tools for number of brillig opcodes

.github/workflows/benchmark.yml

@@ -15,7 +15,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Nargo
-        uses: noir-lang/[email protected].3
+        uses: noir-lang/[email protected].4
         with:
           toolchain: 1.0.0-beta.3
 
@@ -47,3 +47,30 @@ jobs:
           # delete the comment in case changes no longer impact circuit sizes
           delete: ${{ !steps.gates_diff.outputs.markdown }}
           message: ${{ steps.gates_diff.outputs.markdown }}
+
+      # Delete the export files
+      - name: Delete export files
+        run: rm -rf export
+      # Run nargo export again with force-brillig flag
+      - name: Build Brillig benchmark programs
+        run: nargo export --force-brillig
+
+      - name: Generate brillig report
+        run: ./scripts/build-brillig-report.sh
+      - name: Compare brillig reports
+        id: brillig_bytecode_diff
+        uses: noir-lang/noir-gates-diff@dbe920a8dcc3370af4be4f702ca9cef29317bec1
+        with:
+          report: brillig_report.json
+          header: |
+            # Changes to Brillig bytecode sizes
+          brillig_report: true
+          summaryQuantile: 0.9 # only display the 10% most significant circuit size diffs in the summary (defaults to 20%)
+
+      - name: Add brillig 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.brillig_diff.outputs.markdown }}
+          message: ${{ steps.brillig_diff.outputs.markdown }}

.gitignore

@@ -2,3 +2,4 @@ target
 .vscode/launch.json
 export/* 
 gates_report.json
+opcode_report.json

scripts/build-brillig-report.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -e
+
+INSPECTOR=${INSPECTOR:-noir-inspector}
+cd $(dirname "$0")/../
+
+artifacts_path="./export"
+artifacts=$(ls $artifacts_path)
+
+# Start the JSON array
+REPORTS=$(jq --null-input '[]')
+
+for artifact in $artifacts; do    
+    # Get and format the opcode info
+    OP_CODE_INFO=$($INSPECTOR info --json "$artifacts_path/$artifact")
+
+    # Simplified jq expression to output only package_name and opcodes from unconstrained_functions
+    REPORTS=$(echo $OP_CODE_INFO | jq -c '.programs[0] | del(.functions)' | jq -c --argjson old_reports $REPORTS '$old_reports + [.]')
+done
+
+echo $REPORTS | jq '{ programs: . }' > opcode_report.json