v8-profiler-next - npm Package Compare versions

Comparing version 1.5.1 to 1.6.0

package.json

 {
   "name": "v8-profiler-next",
-  "version": "1.5.1",
+  "version": "1.6.0",
   "description": "node bindings for the v8 profiler",
   "main": "dispatch.js",
   "scripts": {
-    "test": "mocha test/*.test.js --timeout 10000"
+    "test-old": "mocha test/*.test.js --exclude test/worker.test.js --timeout 10000",
+    "test-new": "mocha test/*.test.js --timeout 10000",
+    "test": "node scripts/test.js",
+    "test-single": "mocha --timeout 10000",
+    "build": "node-gyp rebuild",
+    "format": "clang-format -i --glob=\"src/**/*[.h|.cc]\""
   },
@@ -25,2 +30,3 @@ "repository": {
     "src",
+    "lib",
     "binding.gyp",
@@ -33,8 +39,9 @@ "dispatch.js",
   "dependencies": {
-    "nan": "^2.14.1"
+    "nan": "^2.15.0"
   },
   "devDependencies": {
     "chai": "^4.2.0",
+    "clang-format": "^1.8.0",
     "mocha": "^5.2.0"
   }
-}
+}

README.md

@@ -17,5 +17,7 @@ # v8-profiler-next
 * **Compatibility**
-  * **node version:** v4.x ~ v16.x
+  * **node version:** v4.x ~ v18.x
   * **platform:** mac, linux, windows
 
+This module can also be used in `worker_threads`.
+
 ### take cpu profile
@@ -51,2 +53,38 @@
 
+Get `.cpuprofile` in `worker_threads`:
+
+```js
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const v8Profiler = require('./');
+const workerThreads = require('worker_threads');
+
+v8Profiler.setGenerateType(1);
+
+if (workerThreads.isMainThread) {
+  const w = new workerThreads.Worker(__filename, {
+    env: process.env,
+  });
+  v8Profiler.startProfiling('main', true);
+  w.once('exit', code => {
+    // create cpu profile in main thread
+    const profile = v8Profiler.stopProfiling('main');
+    const mainProfile = path.join(__dirname, 'main.cpuprofile');
+    fs.existsSync(mainProfile) && fs.unlinkSync(mainProfile);
+    fs.writeFileSync(mainProfile, JSON.stringify(profile));
+  });
+} else {
+  v8Profiler.startProfiling('worker_threads', true);
+  // create cpu profile in worker_threads
+  const start = Date.now();
+  while (Date.now() - start < 2000) { }
+  const profile = v8Profiler.stopProfiling('worker_threads');
+  const workerProfile = path.join(__dirname, 'worker_threads.cpuprofile');
+  fs.existsSync(workerProfile) && fs.unlinkSync(workerProfile);
+  fs.writeFileSync(workerProfile, JSON.stringify(profile));
+}
+```
+
 ### take heapsnapshot
@@ -73,2 +111,38 @@
 
+Get `.heapsnapshot` in `worker_threads`:
+
+```js
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const v8Profiler = require('./');
+const workerThreads = require('worker_threads');
+
+function createSnapshot(filename) {
+  const snapshot = v8Profiler.takeSnapshot();
+  const file = path.join(__dirname, filename);
+  const transform = snapshot.export();
+  transform.pipe(fs.createWriteStream(file));
+  transform.on('finish', snapshot.delete.bind(snapshot));
+}
+
+if (workerThreads.isMainThread) {
+  const w = new workerThreads.Worker(__filename, {
+    env: process.env,
+  });
+
+  // create heapsnapshot in main thread
+  createSnapshot('main.heapsnapshot');
+
+} else {
+  const start = Date.now();
+  const array = [];
+  while (Date.now() - start < 2000) { array.push(new Array(1e3).fill('*')); }
+
+  // create heapsnapshot in worker_threads
+  createSnapshot('worker_threads.heapsnapshot');
+}
+```
+
 ### take allocation profile
@@ -97,2 +171,37 @@
 
+Get `.heapprofile` in `worker_threads`:
+
+```js
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+const v8Profiler = require('./');
+const workerThreads = require('worker_threads');
+
+if (workerThreads.isMainThread) {
+  const w = new workerThreads.Worker(__filename, {
+    env: process.env,
+  });
+  v8Profiler.startSamplingHeapProfiling();
+  w.once('exit', code => {
+    // create heap profile in main thread
+    const profile = v8Profiler.stopSamplingHeapProfiling();
+    const mainProfile = path.join(__dirname, 'main.heapprofile');
+    fs.existsSync(mainProfile) && fs.unlinkSync(mainProfile);
+    fs.writeFileSync(mainProfile, JSON.stringify(profile));
+  });
+} else {
+  v8Profiler.startSamplingHeapProfiling();
+  // create heap profile in worker_threads
+  const start = Date.now();
+  const array = [];
+  while (Date.now() - start < 2000) { array.push(new Array(1e3).fill('*')); }
+  const profile = v8Profiler.stopSamplingHeapProfiling();
+  const workerProfile = path.join(__dirname, 'worker_threads.heapprofile');
+  fs.existsSync(workerProfile) && fs.unlinkSync(workerProfile);
+  fs.writeFileSync(workerProfile, JSON.stringify(profile));
+}
+```
+
 ## II. License
@@ -99,0 +208,0 @@

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Found 1 instance in 1 package

Fixed alerts

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Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

78540

increased by32.68%

Number of package files

30

increased by20%

Lines of code

374

increased by4.76%

Number of lines in readme file

208

increased by110.1%

Worsened metrics

Dev dependency count

3

increased by50%

Dependency changes

• Updatednan@^2.15.0