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Rate limiting algorithms explained: Token Bucket vs Sliding Window vs Fixed Window

Rate limiting sounds simple: count requests, block when over the limit. But the algorithm you choose changes how your API behaves under load. Here's what's actually happening.

  • Fixed Window is the simplest rate limiting algorithm, counting requests in a set time window
  • Token Bucket allows bursts by giving each client a refillable bucket of tokens at a constant rate

Meta's Crawler Goes Live Oct 30. Your Real Deadline Is Oct 29.

Five days left until Meta's crawl clause kicks in. Actually — four. And if you're planning to touch your robots.txt on the morning of October 30th, you've already missed it.

  • Meta's robots.txt change deadline moves to October 29, 2026
  • Businesses must authorize Meta for website crawling and data use
  • Verify robots.txt changes by checking for outdated files and server disagreements

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