PUBLIC MARKS from rmaltete with tag debug

The Xdebug extension helps you debugging your script by providing a lot of valuable debug information. The debug information that Xdebug can provide includes the following: * stack and function traces in error messages with: o full parameter display for user defined functions o function name, file name and line indications o support for member functions * memory allocation * protection for infinite recursions

Callgrind uses runtime instrumentation via the Valgrind framework for its cache simulation and call-graph generation. This way, even shared libraries and dynamically opened plugins can be profiled. The data files generated by Callgrind can be loaded into KCachegrind for browsing the performance results. But there is also a command line tool in the package to get ASCII reports from data files without the need to use KCachegrind.