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Concurrency & performance

asyncio, threading, multiprocessing, and profiling-friendly performance patterns.

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Concurrency & performance medium

How to Speed Up Data Filtering with Python ThreadPoolExecutor

This code compares sequential filtering of even numbers with a threaded version using ThreadPoolExecutor, showing a measurable speedup for I/O-bound work.

threadpoolexecutor concurrency filtering
Python 
import time
from concurrent.futures import ThreadPoolExecutor
import random


def is_even(number):
    time.sleep(0.001)  # simulate work
    return number % 2 == 0


def filter_even_sequential(numbers):
    return [n for n in numbers if is_even(n)]


def filter_even_threaded(numbers):
    with ThreadPoolExecutor(max_…
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