Enable Callgraph and Timeline
| These methods are only available with Tideways Extension Version 5.0.46 and higher. Please upgrade the extension to the latest version before using this API. |
When you are debugging performance problems a full callgraph of all function calls can give you more detailed insights then a regular timeline trace. If you want to trigger a callgraph for a select operation in your application code, then you can trigger it with this following Extension-API-Call:
<?php
if (class_exists('Tideways\Profiler')) {
\Tideways\Profiler::enableCallgraphProfiler();
}The callgraph profiler can only be activated when Tideways is sampling the request, that means the Sample Rate has lead to a positive tracing decision. If you want to be 100% sure to enable the callgraph profiler via the previous API call, then you can also force the tracing profiler to start, which is a programmatic way of setting the sampling rate to 100%:
<?php
if (class_exists('Tideways\Profiler')) {
\Tideways\Profiler::enableTracingProfiler();
}The request of your application was already running until you enabled tracing or callgraph profiling. To see when in your request the Profiler was started, the timeline shows a 'tracing-start' event marker. The timeline should be mostly empty on the left side of this marker, because the instrumentation was only activated afterwards.
