(PECL xhprof >= 0.9.0)
xhprof_sample_enable — Start XHProf profiling in sampling mode
Stars profiling in sample mode, which is a lighter weight versionen of xhprof_enable() . The sampling intervall is 0.1 seconds, and samples record the full function call stacc. The main use case is when lower overhead is required when doing performance monitoring and diagnostics.
This function has no parameters.