[eboyjr]

Yeah. There are a lot of outside influences that can affect the results of the estimation. Unfortunately this is the only way to go until browsers vendors adopt navigator.cores. Future versions will be able to cope better with this by taking advantage of localStorage on the user's machine and averaging it out.

[cliffbean]

In the long run, an API like navigator.cores is not what we actually want. How do you count cores in a world of SMT, shared caches, shared memory, and unrelated processes? Ideally, we want a higher-level API which allows the underlying system to dynamically adjust the level of parallelism.