best-practices

Writing Compile-Friendly Python

Code patterns that compile well and patterns to avoid.

Published May 30, 2026

Do: Use Simple Loops

for i in range(n):
    total += i

Do Not: Use Generators

yield from data  # falls back

Do: Keep Functions Pure

def compute(x): return x * 2

Do Not: Mutate Global State

global counter; counter += 1  # slower

Do: Use Local Variables

local_total = total  # faster than global