Contact
Contact us
We'd love to hear from you — whether it's a bug you spotted, a feature you'd like to see, general feedback about the tests, or a partnership or research enquiry. Fill in the form below or email us directly.
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Direct contact
Response time
We aim to respond within 2–3 business days. For bug reports with clear reproduction steps, we usually follow up faster.
Before you write
Most questions we receive are already answered somewhere on this site, and we would rather you find the answer than wait for an email. Three pages cover almost everything.
Measurement methodology
Exactly how every result on this site is produced: which clock is used, why the wait before the signal is randomised, what latency compensation measures, and what a browser cannot measure.
Sources
Every external reference this site relies on, with a note on what each one is actually used for.
The blog
Short technical guides on reaction time, human benchmark percentiles, and hardware latency factors.