Keyboard Response Time Test: How to Read Median, Min, and Jitter

Response time stats look cryptic until you know which numbers predict stable typing. Learn how min, max, and spread map to real desk workflows.

Median beats hero mins

One lucky low sample does not describe daily typing. Median latency tracks what you actually live with across hundreds of presses.

Use min and max as sanity bounds, not bragging rights.

Log median and jitter together; a stable median with rising jitter often predicts “off” sessions before your WPM chart moves.

Treat polling Hz as a ceiling, not a personality. Firmware debounce and transport still dominate what your fingers feel day to day.

Try the latency tester

Sample end-to-end delay in milliseconds inside the same browser you use for Type Faster. Log median and jitter after cable, receiver, or power changes—then rerun a timed test to see if rhythm calms down.

Open keyboard latency tester

Jitter warns before averages move

Wide jitter often arrives before median shifts when Bluetooth stacks degrade or hubs saturate.

Treat rising spread as a maintenance signal, not noise.

After you change cables or receivers, resample latency before you judge a typing score from the same night. Fresh numbers prevent you from blaming technique for a flaky stack.

Pair browser latency samples with the same browser profile you use for Type Faster benchmarks so the pipeline matches reality.

Pair stats with timed passages

After improving jitter, rerun the same Type Faster passage tier twice on separate days.

If accuracy tightens first, you likely reduced subconscious hesitation.

Close media-heavy background tabs before sampling; compositor contention shows up as spikes that look like keyboard problems.

If one key column drifts in latency while others stay tight, cross-check with the full key map before you assume the OS is at fault.

Continue practicing

This guide is about input delay and sampling. Run the latency tester to capture milliseconds and jitter, then use a typing test to see if scores stabilize.

Open latency tester Run 1-minute typing test

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