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Concurrency & performance

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

3 matches

How to Build a Producer-Consumer Pattern with asyncio.Queue in Python

This code implements a classic producer-consumer pattern using asyncio.Queue to coordinate one producer task that generates items and two consumer tasks that process them concurrently, with a sentinel value to signal completion.

asyncio queue concurrency

Python

import asyncio
import random


async def producer(queue, item_count):
    for i in range(item_count):
        item = random.randint(1, 100)
        await queue.put(item)
        print(f"Produced: {item}")
        await asyncio.sleep(0.1)
    await queue.put(None)  # Sentinel to signal end


async def consumer(queue, n…

14 0 Open

Concurrency & performance easy

How to Signal asyncio Workers to Stop with an Event in Python

Use an asyncio.Event to coordinate graceful shutdown of multiple concurrent worker tasks in Python.

asyncio events concurrency

Python

import asyncio
import random

async def worker(name, stop_event):
    while not stop_event.is_set():
        await asyncio.sleep(random.uniform(0.1, 0.5))
        print(f"Worker {name} processing...")
    print(f"Worker {name} stopped.")

async def main():
    stop_event = asyncio.Event()
    workers = [asyncio.create…

11 0 Open

Concurrency & performance medium

asyncio Condition wait notify pattern in Python

Coordinate coroutines with asyncio.Condition: workers wait for notifications and the main task notifies one or all of them.

asyncio concurrency synchronization

Python

import asyncio


async def worker(condition, name):
    async with condition:
        print(f"{name} waiting...")
        await condition.wait()
        print(f"{name} notified!")


async def main():
    condition = asyncio.Condition()
    tasks = [asyncio.create_task(worker(condition, f"worker-{i}")) for i in range(3…

14 0 Open

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