* Fast compiles and low memory use * Expressive diagnostics * GCC compatibility * A real-world, production quality compiler * A simple and hackable code base * A single unified parser for C, Objective C, C++, and Objective C++ * Conformance with C/C++/ObjC and their variants

* Xdebug's basic functions include the display of stack traces on error conditions, maximum nesting level protection and time tracking. * The debug information that Xdebug can provide includes the following: - stack and function traces in error messages with: - full parameter display for user defined functions - function name, file name and line indications - support for member functions - memory allocation - protection for infinite recursions * Xdebug also provides: - profiling information for PHP scripts - code coverage analysis - Capabilities to debug your scripts interactively with a debugger front-end.