Пакет php5-xhprof: Информация

XHProf is a function-level hierarchical profiler for PHP and has a
simple HTML based navigational interface. The raw data collection
component is implemented in C (as a PHP extension). The reporting/UI
layer is all in PHP. It is capable of reporting function-level
inclusive and exclusive wall times, memory usage, CPU times and
number of calls for each function. Additionally, it supports ability
to compare two runs (hierarchical DIFF reports), or aggregat
results from multiple runs.