tools: add benchmark runner to test-shared

Author: aduh95

.github/workflows/test-shared.yml

@@ -1,4 +1,4 @@
-name: Test Shared librairies
+name: Benchmark and shared librairies
 
 on:
   pull_request:
@@ -23,6 +23,30 @@ on:
       - doc/**
       - .github/**
       - '!.github/workflows/test-shared.yml'
+  workflow_dispatch:
+    inputs:
+      repo:
+        type: string
+        description: GitHub repository to fetch from (default to the current repo)
+      pr_id:
+        type: number
+        required: true
+        description: The PR to test
+      commit:
+        required: true
+        type: string
+        description: The expect HEAD of the PR
+      category:
+        required: true
+        type: string
+        description: The category (or categories) of tests to run, for example buffers, cluster etc. Maps to a folders in node/benchmark
+      filter:
+        type: string
+        description: A substring to restrict the benchmarks to run in a category. e.g. `net-c2c`
+      runs:
+        type: number
+        default: 30
+        description: How many times to repeat each benchmark
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
@@ -52,9 +76,26 @@ jobs:
     runs-on: ${{ matrix.runner }}
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
+        if: ${{ github.event_name != 'workflow_dispatch' }}
         with:
           persist-credentials: false
 
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
+        if: ${{ github.event_name == 'workflow_dispatch' }}
+        with:
+          repository: ${{ inputs.repo || github.repository }}
+          ref: refs/pull/${{ inputs.pr_id }}/merge
+          persist-credentials: false
+          fetch-depth: 2
+
+      - name: Validate PR head and roll back to base commit
+        if: ${{ github.event_name == 'workflow_dispatch' }}
+        run: |
+          [ "$(git rev-parse HEAD^2)" = "$EXPECTED_SHA" ]
+          git reset HEAD^ --hard
+        env:
+          EXPECTED_SHA: ${{ inputs.commit }}
+
       - uses: cachix/install-nix-action@7be5dee1421f63d07e71ce6e0a9f8a4b07c2a487  # v31.6.1
         with:
           extra_nix_config: sandbox = true
@@ -68,12 +109,19 @@ jobs:
             core.exportVariable('ACTIONS_RESULTS_URL', process.env.ACTIONS_RESULTS_URL || '');
             core.exportVariable('ACTIONS_RUNTIME_TOKEN', process.env.ACTIONS_RUNTIME_TOKEN || '');
 
+      - name: Load shell.nix
+        if: github.event_name == 'workflow_dispatch'
+        run: |
+          [ -f shell.nix ] || curl -fsLSO https://github.com/${GITHUB_REPOSITORY}/raw/${GITHUB_SHA}/shell.nix
+          [ -f nixpkgs.nix ] || curl -fsLSO https://github.com/${GITHUB_REPOSITORY}/raw/${GITHUB_SHA}/nixpkgs.nix
+
       - name: Patch npm gyp
+        if: github.event_name != 'workflow_dispatch'
         run: |
           curl -L https://github.com/nodejs/gyp-next/commit/8224deef984add7e7afe846cfb82c9d3fa6da1fb.diff \
           | git apply --directory=deps/npm/node_modules/node-gyp/gyp
 
-      - name: Build Node.js and run tests
+      - name: Build Node.js ${{ github.event_name == 'workflow_dispatch' && 'on the base commit' || 'and run tests' }}
         run: |
           nix-shell \
             -I nixpkgs=./nixpkgs.nix \
@@ -84,5 +132,93 @@ jobs:
             --arg devTools '[]' \
             --arg benchmarkTools '[]' \
             --run '
-                make run-ci -j4 V=1 TEST_CI_ARGS="-p actions --measure-flakiness 9 --skip-tests=$CI_SKIP_TESTS"
+                make ${{ github.event_name == 'workflow_dispatch' && 'build' || 'run' }}-ci -j4 V=1 TEST_CI_ARGS="-p actions --measure-flakiness 9 --skip-tests=$CI_SKIP_TESTS"
+            '
+
+      - name: Re-build Node.js on the merge commit
+        # ccache is disabled here to avoid polluting the cache. Local build outputs should make this build relatively quick anyway.
+        if: ${{ github.event_name == 'workflow_dispatch' }}
+        run: |
+          mv out/Release/node base_node
+          git reset FETCH_HEAD --hard
+          nix-shell \
+            -I nixpkgs=./nixpkgs.nix \
+            --pure \
+            --arg loadJSBuiltinsDynamically false \
+            --arg ccache 'null' \
+            --arg devTools '[]' \
+            --arg benchmarkTools '[]' \
+            --run '
+                make -j4 V=1
+            '
+
+      - name: Run benchmark
+        if: ${{ github.event_name == 'workflow_dispatch' }}
+        run: |
+          nix-shell \
+            -I nixpkgs=./nixpkgs.nix \
+            --pure --keep FILTER \
+            --arg loadJSBuiltinsDynamically false \
+            --arg ccache 'null' \
+            --arg icu 'null' \
+            --arg sharedLibDeps '{}' \
+            --arg devTools '[]' \
+            --run '
+                set -o pipefail
+                ./base_node benchmark/compare.js \
+                  --filter "$FILTER" \
+                  --runs ${{ inputs.runs }} \
+                  --old ./base_node --new ./node \
+                  -- ${{ inputs.category }} \
+                | tee /dev/stderr \
+                > ${{ matrix.system }}.csv
+                Rscript benchmark/compare.R < ${{ matrix.system }}.csv
+            '
+        env:
+          FILTER: ${{ inputs.filter }}
+
+      - name: Upload raw benchmark results
+        if: ${{ github.event_name == 'workflow_dispatch' }}
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02  # v4.6.2
+        with:
+          name: csv-${{ matrix.system }}
+          path: ${{ matrix.system }}.csv
+
+  aggregate-benchmark-results:
+    needs: build
+    name: Aggregate benchmark results
+    if: ${{ github.event_name == 'workflow_dispatch' }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683  # v4.2.2
+        with:
+          persist-credentials: false
+          sparse-checkout: |
+            benchmark/*.R
+            *.nix
+          sparse-checkout-cone-mode: false
+
+      - name: Download benchmark raw results
+        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0  # v5.0.0
+        with:
+          pattern: csv-*
+          merge-multiple: true
+          path: raw-results
+
+      - uses: cachix/install-nix-action@7be5dee1421f63d07e71ce6e0a9f8a4b07c2a487  # v31.6.1
+        with:
+          extra_nix_config: sandbox = true
+
+      - name: Benchmark results
+        run: |
+          nix-shell \
+            -I nixpkgs=./nixpkgs.nix \
+            --pure \
+            --arg loadJSBuiltinsDynamically false \
+            --arg ccache 'null' \
+            --arg icu 'null' \
+            --arg sharedLibDeps '{}' \
+            --arg devTools '[]' \
+            --run '
+                awk "FNR==1 && NR!=1{next;}{print}" raw-results/*.csv | Rscript benchmark/compare.R
             '