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Expert Python Programming - Third Edition
book

Expert Python Programming - Third Edition

by Michał Jaworski, Tarek Ziadé, Cody Jackson
April 2019
Intermediate to advanced content levelIntermediate to advanced
646 pages
16h 48m
English
Packt Publishing
Content preview from Expert Python Programming - Third Edition

Micro-profiling

When the slow function is found, it is sometimes necessary to do more profiling work that tests just a part of the program. This is done by manually instrumenting a part of the code in a speed test.

For instance, the cProfile module can be used in a form of decorator, as in following example:

import timeimport tempfileimport cProfileimport pstatsdef profile(column='time', list=3):    def parametrized_decorator(function):        def decorated(*args, **kw):            s = tempfile.mktemp()            profiler = cProfile.Profile()            profiler.runcall(function, *args, **kw)            profiler.dump_stats(s)            p = pstats.Stats(s)            print("=" * 5, f"{function.__name__}() profile", "=" * 5)            p.sort_stats(column).print_stats(list)        return decorated    return parametrized_decoratordef ...
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Publisher Resources

ISBN: 9781789808896Other