asyncio Pitfalls: The 3-Hour Bug

Last week, my boss asked me to speed up an old web scraping project. I thought, "No problem — I’ll just throw asyncio at it, fetch concurrently, and theoretically slash 200 requests from 40 seconds to around 2." But after writing the first version, while it was indeed faster, half the data was missing and the console was flooded with RuntimeWarning: coroutine was never awaited . Even worse, the program would randomly freeze with 0% CPU and eventually time out. After three hours of poring over do