Python Timeit Module
The timeit module provides a simple way to time small bits of Python code. It has both a Command-Line Interface as well as a callable one. It avoids a number of common traps for measuring execution time.
Importing the Module
import timeitBasic Usage
timeit.timeit()
The timeit() function runs the setup code once, then executes the statement repeatedly (default 1,000,000 times) and returns the total execution time in seconds.
import timeit
execution_time = timeit.timeit('"-".join(str(n) for n in range(100))', number=10000)
print(execution_time)timeit.repeat()
The repeat() function calls timeit() multiple times and returns a list of results.
import timeit
times = timeit.repeat('"-".join(str(n) for n in range(100))', repeat=3, number=10000)
print(times)Using Setup Code
You can pass setup code (e.g., imports or variable definitions) to the setup parameter. This code is executed once before the timing loop begins.
import timeit
setup_code = "from math import sqrt"
stmt_code = "sqrt(9)"
print(timeit.timeit(stmt=stmt_code, setup=setup_code, number=100000))Command Line Interface
You can also use timeit from the command line.
python -m timeit '"-".join(str(n) for n in range(100))'