Add express.js to the bench & provide CPU instructions

README.md

@@ -44,6 +44,16 @@ See https://github.com/zertosh/v8-compile-cache/tree/master/bench.
 
 _^ Includes the overhead of loading the cache itself._
 
+**CPU Instructions:**
+
+| Module           | Without Cache   | With Cache       |
+| ---------------- | ---------------:| ----------------:|
+| `babel-core`     | ` 1,052,229,095`| `797,511,448`    |
+| `yarn`           | `   777,718,754`| `545,279,558`    |
+| `yarn` (bundled) | ` 1,190,974,452`| `562,439,581`    |
+
+_^ Includes the overhead of loading the cache itself._
+
 ## Acknowledgements
 
 * `FileSystemBlobStore` and `NativeCompileCache` are based on Atom's implementation of their v8 compile cache: 

bench/require-express.js

@@ -0,0 +1,9 @@
+#!/usr/bin/env node
+'use strict';
+
+const WITH_CACHE = true;
+
+require('./_measure.js')('require-express', WITH_CACHE, () => {
+  const express = require('express');
+  const app = express();
+});

bench/run-perf-stat.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# for i in {1..5}; do node bench/require-yarn.js; done
+
+# rm -rf "$TMPDIR/v8-compile-cache"
+
+THIS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+: ${NODE_BIN:=node}
+
+$NODE_BIN -p '`node ${process.versions.node}, v8 ${process.versions.v8}`'
+
+for f in $THIS_DIR/require-*.js; do
+  echo "Running "$(basename $f)""
+  for i in {1..5}; do perf stat -e instructions -- $NODE_BIN $f; done
+done

package.json

@@ -17,6 +17,7 @@
   "devDependencies": {
     "babel-core": "6.23.1",
     "eslint": "^3.15.0",
+    "express": "^4.16.4",
     "flow-parser": "0.38.0",
     "rimraf": "^2.5.4",
     "rxjs": "5.2.0",