How Python's asyncio and httpx Can Scrape 1000 Web Pages in Seconds

A technical tutorial published on DEV Community demonstrates how to use Python's asyncio library alongside the httpx HTTP client to perform high-speed concurrent web scraping. Unlike synchronous scraping, where each request must wait for a server response before the next begins, asynchronous scraping fires multiple requests simultaneously, dramatically reducing total runtime. The guide illustrates that scraping 1000 pages synchronously could take around 300 seconds, while the async approach can complete the same task in roughly 3 seconds. The tutorial includes full working code covering concurrent fetching with a semaphore-controlled limit of 20 simultaneous requests, HTML parsing via BeautifulSoup, and error handling for failed requests. It also introduces a retry mechanism to improve reliability when individual requests fail.