Cap requests per user per window accurately using a sliding window log, the algorithm behind real API limits.
You must allow at most N requests per user per minute, but a fixed-window counter lets a burst slip through at the window boundary.
A sliding window log keeps the exact timestamps in the last window, so the limit is accurate with no boundary burst.
Use this to protect APIs, login endpoints, and any resource that must not be hammered by one caller.
A language you know; for production, a store such as Redis with sorted sets.
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