How GitHub Handles Millions of Pull Requests Without Slowing Down
SMRTR summary
When you click 'Create Pull Request' on GitHub, the platform only does the minimum work needed to confirm your request, then offloads everything else — CI triggers, notifications, diffs, webhooks — to background workers running in parallel. This async-first architecture is why GitHub feels instant despite handling millions of PRs daily, and the same pattern applies everywhere from photo uploads to social media posts.
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