chore: perf check, will fail if regression > 3%

.github/workflows/check.yml

@@ -24,4 +24,7 @@ jobs:
       - name: Coverage
         uses: coverallsapp/[email protected]
         with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Performance
+        run: |
+          npm run perf:diff

benchmark/diff.js

@@ -45,3 +45,6 @@ const diff = (localResult.perf - latestResult.perf) / latestResult.perf
 console.log(`Local: ${localResult.perf.toFixed(3)} ops/s (${localResult.cycles} cycles)`)
 console.log(`Latest: ${latestResult.perf.toFixed(3)} ops/s (${latestResult.cycles} cycles)`)
 console.log(`Diff: ${(diff * 100).toFixed(3)}%`)
+
+const THRESHOLD_PERCENT = -3
+process.exit(diff * 100 < THRESHOLD_PERCENT ? 1 : 0)

bin/perf-diff.sh

@@ -13,4 +13,4 @@ if [ ! -f $FILE_LOCAL ]; then
     BUNDLES=cjs npm run build:dist
 fi
 
-node benchmark/diff.js $FILE_LOCAL $FILE_LATEST
+exec node benchmark/diff.js $FILE_LOCAL $FILE_LATEST