Python Essential Reference, Second Edition

The Python Profiler

This section describes the Python profiler—a tool that can be used to analyze the runtime performance of a program.

profile

The profile module is used to collect profiling information.

						run(command
						[,
						filename])
					

Executes the contents of command using the exec statement under the profiler. filename is the name of a file in which raw profiling data is saved. If omitted, a report such as the following is printed to standard output:

 126 function calls (6 primitive calls) in 5.130 CPU seconds Ordered by: standard name ncalls tottime percall cumtime percall filename:lineno(function) 1 0.030 0.030 5.070 5.070 <string>:1(?) 121/1 5.020 0.041 5.020 5.020 book.py:11(process) 1 0.020 0.020 5.040 5.040 book.py:5(?) 2 0.000 0.000 0.000 ...