import perf
runner = perf.Runner()
runner.timeit("format('abc')")
runner.timeit("'abc'.replace('x', 'y')")
runner.timeit("'abc'.ljust(5)")
runner.timeit("(1, 2, 3).index(2)")
runner.timeit("a.index(2)", setup="a = [1, 2, 3]")
runner.timeit("math.pow(0.5, 2.0)", setup="import math")