pproftest

Documentation

Index

• func StartCPUProfile(t testing.TB, w io.Writer)
• func WriteHeapProfile(t testing.TB, w io.Writer)

Functions

func StartCPUProfile

func StartCPUProfile(t testing.TB, w io.Writer)

StartCPUProfile enables CPU profiling for the current process. While profiling, the profile will be buffered and written to w. StartCPUProfile returns an error if profiling is already enabled.

On Unix-like systems, StartCPUProfile does not work by default for Go code built with -buildmode=c-archive or -buildmode=c-shared. StartCPUProfile relies on the SIGPROF signal, but that signal will be delivered to the main program's SIGPROF signal handler (if any) not to the one used by Go. To make it work, call os/signal.Notify for syscall.SIGPROF, but note that doing so may break any profiling being done by the main program.

func WriteHeapProfile

func WriteHeapProfile(t testing.TB, w io.Writer)

WriteHeapProfile is shorthand for [Lookup]("heap").WriteTo(w, 0). It is preserved for backwards compatibility.