Oversampling method calls

nikic / sample_prof

Sampling profiler for PHP

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Oversampling method calls #3

Open vasily-kartashov opened 6 years ago

vasily-kartashov commented 6 years ago

Comparing the profiling output from sample_prof to xdebug it seems that sample_prof oversamples method calls.

nikic commented 6 years ago

It's expected that sample_prof and xdebug provide different results (because xdebug uses an instrumenting profiling mechanism that has a large effect on the cost of certain operations). Depending on the size of the difference it might be a bug though. If you can share example profiles for sample_prof and xdebug I can take a closer look.