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Webgrind is an Xdebug profiling web frontend in PHP. It implements a subset of the features of kcachegrind and installs in seconds and works on all platforms. For quick'n'dirty optimizations it does the job. Here's a screenshot showing the output from profiling:


  • Super simple, cross platform installation - obviously :)
  • Track time spent in functions by self cost or inclusive cost. Inclusive cost is time inside function + calls to other functions.
  • See if time is spent in internal or user functions.
  • See where any function was called from and which functions it calls.
  • Generate a call graph using

Suggestions for improvements and new features are more than welcome - this is just a start.


  1. Download webgrind
  2. Unzip package to favourite path accessible by webserver.
  3. Load webgrind in browser and start profiling

Alternatively, on PHP 5.4+ run the application using the PHP built-in server with the command composer serve or php -S index.php if you are not using Composer.

For faster preprocessing, give write access to the bin subdirectory, or compile manually:

  • Linux / Mac OS X: execute make in the unzipped folder (requires GCC or Clang.)
  • Windows: execute nmake -f NMakeFile in the unzipped folder (requires Visual Studio 2015 or higher.)

See the Installation Wiki page for more.

Use with Docker

Instead of uploading webgrind to a web server or starting a local one, you can use the official Docker image to quickly inspect existing xDebug profiling files. To use the Docker image, run the following command with /path/to/xdebug/files replaced by the actual path of your profiling files.

docker run --rm -v /path/to/xdebug/files:/tmp -p 80:80 jokkedk/webgrind:latest

Now open http://localhost in your browser. After using webgrind you can stop the Docker container by pressing CTRL / Strg + C.

To use the built-in file viewer, mount the appropriate files under /host in the container.


Webgrind is written by Joakim Nygård and Jacob Oettinger. It would not have been possible without the great tool that Xdebug is thanks to Derick Rethans.

Current maintainer is Micah Ng.