Rethinking of CPU profile analysis and processing. Focused on profiles and logs of any size collected in V8 runtimes: Node.js, Deno and Chromium browsers.

Supported formats:

• V8 CPU profile (.cpuprofile)
• V8 log preprocessed with --preprocess (.json)
• Chromium Performance Profile format (.json)
• Edge Enhanced Performance Traces (.devtools)

STATUS: MVP

The project is at an early stage of development. Some things have yet to be added and polished. Feel free to create an issue if you found a bug or have an idea.

Head to the viewer on GitHub pages, open a file in one of supported formats or drop it on the page.

CLI allows to generate a report (an viewer with embedded data) from a profile file.

To use CLI install cpupro globally using npm install -g cpupro, or use npx cpupro.

• open viewer without embedded data in default browser:

  cpupro
  

• open viewer with test.cpuprofile data embedded:

  cpupro test.cpuprofile
  

• open viewer with data embedded from stdin:

  cpupro - <test.cpuprofile
  

  cat test.cpuprofile | cpupro -
  

• get usage information:

  Usage:
  
      cpupro [filepath] [options]
  
  Options:
  
      -f, --filename <filename>    Specify a filename for a report; should ends with .htm or .html,
                                   otherwise .html will be added
      -h, --help                   Output usage information
      -n, --no-open                Prevent open a report in browser, the report will be written to file
      -o, --output-dir <path>      Specify an output path for a report (current working dir by default)
      -v, --version                Output version
  

Main cpupro API is similar to console.profile() / console.profileEnd() with an exception that the profileEnd() method does nothing but returns API for saving data to a file or generating a report:

const profiler = require('cpupro');

profiler.profile('profileName');

// ... do something

const profile = profiler.profileEnd('profileName');

// write data to .cpuprofile file
profile.writeToFile('./path/to/demo.cpuprofile');
// or write a report (the viewer with embedded data) to file
profile.report.writeToFile('report.html');
// or open the report in a browser
profile.report.open();

It is allowed to have several profiles being recorded at once. It's possible to use a reference to profile record API instead of a profile name:

const profiler = require('cpupro');

const profile = profiler.profile();

// ... do something

// end profiling and open a report in a browser
profile.profileEnd().openReport();

Record profile, generate report and open it in a browser:

node --require cpupro path/to/script.js

Record profile, generate report and write into a file:

node --require cpupro/file path/to/script.js
# or
node --require cpupro/file/report path/to/script.js

Record profile and write it into .cpuprofile file:

node --require cpupro/file/data path/to/script.js

MIT