Performant Pythonhow to write good, fast, python code

@georgebernhardbk@xk7.com

how to write good, fast, python code

how to write good, fast, python codehow to write good, fast, python code

how to write good, fast, python codehow to write good, fast, python codehow to write good, fast, python code

import thisBeautiful is better than ugly.

Explicit is better than implicit.

Simple is better than complex.

Complex is better than complicated.

Flat is better than nested.

Sparse is better than dense.

Readability counts.

how to write good, fast, python codehow to write good, fast, python codehow to write good, fast, python code

https://twitter.com/jakevdp/status/850373744644182017\

Programmers are expensive

Computers are cheap

how to write good, fast, python codehow to write good, fast, python codehow to write good, fast, python code

how to write good, fast, python code

how to write good, fast, python code

how to write good, fast, python code

Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered.

Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered.

We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil.

Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered.

We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil. Yet we should not pass up our opportunities in that critical 3%.

Donald Knuth

how to write good, fast, python code

Profiling

Batteries included!

python -m cProfile anagram0.py > profile_anagram0.txt

how to write good, fast, python code

how to write good, fast, python code

Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered.

We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil. Yet we should not pass up our opportunities in that critical 3%.

Donald Knuth

how to write good, fast, python code

Programmers waste enormous amounts of time thinking about, or worrying about, the speed of noncritical parts of their programs, and these attempts at efficiency actually have a strong negative impact when debugging and maintenance are considered.

We should forget about small efficiencies, say about 97% of the time: premature optimization is the root of all evil. Yet we should not pass up our opportunities in that critical 3%.

Donald Knuth

“Premature optimization is the root of all evil, so to start this project I'd better come up with a system that can determine whether a possible optimization is premature or

not."

Fin.

Micro optimisations

http://www.freeimageslive.co.uk/free_stock_image/labreatarpitsjpg

If you want to see my slides on micro optimisations, you can see them below.

Anagrams

anagram0.py

+ works+ didn’t take long to write

Python 2.7 FTW!

PyPy FTW FTW!

52 x faster - Datastructures FTW!

What are you doing?

And now for something completely different….

Variations on an almost trivial sum….

Tools