[trod123]

That's not true.

The jitter had very little intended effect since accurate system timing can be derived from the instruction processing time of arbitrary javascript code in a mostly browser agnostic way, specifically iteration (i=i+1). It applied broadly to a large number of different types of instructions

[IggleSniggle]

But how do you measure the timing of those instructions without a precise timer? Yes it was the instructions that produce the reproducible timing, and that timing will be consistent on the system, but the measurement of those timings from the performance timers will not display that same consistency. Is there another way to measure from a within-session context?