A 100ms API Can Still Produce a Terrible User Experience
This story is from 2026-09-14. It is preserved in the archive; the latest stories are on the live feed.
Your backend team tells you the API is fast. The endpoint responds in 100ms. Database queries are optimized. Server CPU looks healthy. P95 latency is under 200ms. So why does the application still feel slow? Because the user doesn't experience your API latency. They experience the time between doin…
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- 2026-09-14 13:14 · DEV Community — AI
A 100ms API Can Still Produce a Terrible User Experience