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Performance measurement

Flame graphs​

The LanSuite developer setup supports generation of xDebug traces. Those traces can be used to generate a flame graph.

This guide shows you how to generate a flame graph. It assumes you have a local development setup running. This guide is not meant for your production site.

  1. Get a local copy of https://github.com/brendangregg/FlameGraph

  2. Start LanSuite via the docker-compose setup:

    docker-compose up

  3. Run a website call with the GET parameter ?XDEBUG_TRACE=lansuite like http://127.0.0.1:8080/?XDEBUG_TRACE=lansuite

  4. A new trace is generated and stored inside your root directory of the source code. It is called like xdebug.trace.1689363817._code_index_php.xt.gz

  5. Unpack the trace

    gunzip xdebug.trace.1689363817._code_index_php.xt.gz

  6. Switch to your local copy of the FlameGraph repository and call

    php stackcollapse-xdebug.php ../lansuite/xdebug.trace.1689363817._code_index_php.xt | ./flamegraph.pl > lansuite.svg

  7. Open lansuite.svg and you should see something like