A web page that measures keyboard latency via reaction time and tap duration tests, allowing users to submit results for comparison.
<p>Hello, fellow geeks!</p>
<p>I was working on a side project when I discovered something odd about how keyboards behave. I only have three keyboards myself to test with, so I would like to recruit your help in providing me data from your keyboards.</p>
<p>The link leads to a simple 3.5 minute browser-based test which lets you record response times and tap durations from your keyboard, and then send them to me. If you can take the time out of your day to help me better understand this, I'd greatly appreciate your contribution.</p>
<p>Once I have enough data, I will naturally share the results of the analysis back with the community. I'd like to also share the raw data, but I haven't yet thought through any potential privacy concerns around this, so I don't yet know if I will.</p>
<p><a href="https://lobste.rs/s/ynrwwo/keyboard_latency_probe">Comments</a></p>
# Keyboard latency probe
Source: [https://xkqr.org/bellwether/keyboardtest.html](https://xkqr.org/bellwether/keyboardtest.html)
This web page is meant to test two aspects of your keyboard:
1. Its latency \(through a reaction time test\), and
2. Its tap duration distribution \(through a paced tapping test\)\.
The two types of test \(reaction time and paced tapping\) are intermixed during the test\. When starting the test, you will first have a reaction time block, then a tapping block, then a reaction time block again, until you've had seven blocks of each\. Each block takes about 30 seconds to finish, meaning the total test time is 3\.5 minutes\.
When the test is done, please describe your keyboard setup and then**press Send to submit your results**\.
## Multiple keyboards
If you have multiple keyboards \(e\.g\. both external keyboard and built\-in laptop keyboard\), or multiple ways of connecting your keyboard \(e\.g\. both USB and Bluetooth\) I would greatly appreciate if you run the test one time for each keyboard and way to connect it\. Do not mix keyboards within a test\.
## Reaction time test
The first test that runs is a reaction time test\. When it starts, the big rectangle will say "wait\.\.\." and then after a random amount of time switch colour to green\. When it does, you are supposed to tap any key as quickly as possible\.
## Paced tapping test
The second test that runs is a paced tapping test\. When it starts, you will see a blinking yellow dot\. Tap any key as briefly as possible when the dot lights up\. It is important that you don't hold the key down, but just briefly tap it\.
## Technical issues
If you experience technical issues, or the instructions were vague, feel free to restart the test\. Send only the data from the most successful run\. I'm looking to test the abilities of your keyboard, not you as a person\.
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Look at the rectangular area below and click start\.
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## Reaction time \(stimulus → keydown\), ms
## Tap duration \(keydown → keyup\), ms
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