May 2017
Beginner to intermediate
220 pages
5h 2m
English
Content preview from Python Web Scraping - Second Edition
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When to use caching?
To cache, or not to cache? This is a question many programmers, data scientists, and web scrapers need to answer. In this chapter, we will show you how to use caching for your web crawlers; but should you use caching?
If you need to perform a large crawl, which may be interrupted due to an error or exception, caching can help by not forcing you to recrawl all the pages you might have already covered. Caching can also help you by allowing you to access those pages while offline (for your own data analysis or development purposes).
However, if having the most up-to-date and current information from the site is your highest priority, then caching might not make sense. In addition, if you don't plan large or repeated crawls, ...
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