Render Budget

Render budget describes the limited resources Google's Web Rendering Service (WRS) allocates to executing JavaScript on crawled pages. While crawl budget determines how many URLs Googlebot will fetch, render budget determines how many of those pages will have their JavaScript executed in Google's headless Chromium environment. Because rendering is computationally expensive, Google processes JavaScript pages in a separate queue from crawling, creating delays of seconds to potentially much longer for large sites. Pages that exceed rendering capacity may time out or remain in a 'Discovered, currently not indexed' state. The concept was popularized by Botify's analogy: if crawl budget is opening the envelope, render budget is reading the letter.