It's surprising to me that there are such various levels of coarseness each browser vendor chose: Gecko [0]: accurate to 20us Edge [1]: accurate to 20us, with

It's surprising to me that there are such various levels of coarseness each browser vendor chose: Gecko [0]: accurate to 20us Edge [1]: accurate to 20us, with an additional 20us of noise Chrome [2]: accurate to 100us (thanks mkeblx for finding this) Safari [OP]: accurate to 1000us [0] https://blog.mozilla.org/security/2018/01/03/mitigations-landing-new-class-timing-attack/ https://blog.mozilla.org/security/2018/01/03/mitigations-lan... [1] https://blogs.windows.com/msedgedev/2018/01/03/speculative-execution-mitigations-microsoft-edge-internet-explorer/ https://blogs.windows.com/msedgedev/2018/01/03/speculative-e... [2] https://chromium-review.googlesource.com/c/chromium/src/+/853505 https://chromium-review.googlesource.com/c/chromium/src/+/85...