node-remote-pprof

Library that implements the google-perftools remote interface as a Express/Connect-compatible router.

Installation

npm install --save node-remote-pprof

Usage

1. Add the /pprof endpoint to your application

   const express = require('express');
   const pprof = require('node-remote-pprof');
   
   const app = express();
   
   app.use('/pprof', pprof());
   
   app.listen(3000);

2. Run the application

   node --perf-basic-prof .../app.js

   The --perf-basic-prof command-line is needed for resolving Javascript symbols dynamically.

3. Use the pprof tool to profile the application

   pprof --web localhost:3000

   Note: Either the original pprof or the go version should work here.

Environment

This library is very rough, and only got light testing on mac OS High Sierra and some Linux derivates. Expect bugs and missing features.

By default the application will run with heap profiling disabled, this can be controlled by settingthe HEAPPROFILE environment variable to the prefix of the heap dumps to create.

Alpine Linux/musl is not supported right now: See https://github.com/gperftools/gperftools/issues/693 for details and further links.

License

Apache-2.0.