High-precision HTML5 get_timer
A downloadable extension
Try the following:
var t = get_timer(); repeat (1000) sqrt(2); show_debug_message(get_timer() - t);
On HTML5, this would print 0, because get_timer is using (new Date).getTime()*1000, thus having millisecond accuracy at most, and a few other gotchas.
But, if you import this extension (which replaces the implementation with a higher-precision performance.now) and re-run the sample, you would see an actual timestamp diff, like 304999.9 (note that modern browsers will clamp timestamp precision to mitigate fingerprinting/side-channel attacks).
Click download now to get access to the following files:
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