Reading privileged memory with a side-channel

Re:Reading privileged memory with a side-channel by jchw on Wednesday January 03, 2018 @08:10PM (#16067116)

> ...severely round performance.now().

This sucks, and is a side-effect that I didn't even think about. I guess it's probably pretty effective, but it will make benchmarking a lot harder, since you'll probably now have to do a lot more runs.

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Re:Reading privileged memory with a side-channel by gchadwick on Thursday January 04, 2018 @05:25AM (#16069225)

If it was a big issue you can always introduce a 'benchmark mode' switch that allows you to put resolution back into the counter when you want to run a benchmark. Display a 'WARNING BROWSER INSECURE IN THIS MODE' banner for good measure.

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Re:Reading privileged memory with a side-channel by user5994461 on Thursday January 04, 2018 @02:12AM (#16068579)

Doubt that. The Firefox news said they will round to 20 us.

That's much more accurate than necessary to benchmark any software code.

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