javascript - 获取 JavaScript 中的 CPU 内核数？

Question

有没有办法确定 JavaScript 中可用 CPU 内核的数量，以便您可以根据此调整网络 worker 的数量？

Answer 1

是的。引用 MDN:

The navigator.hardwareConcurrency read-only property returns the number of logical processors available to run threads on the user's computer…

Modern computers have multiple physical processor cores in their CPU (two or four cores is typical), but each physical core is also usually able to run more than one thread at a time using advanced scheduling techniques. So a four-core CPU may offer eight logical processor cores, for example. The number of logical processor cores can be used to measure the number of threads which can effectively be run at once without them having to context switch.

The browser may, however, choose to report a lower number of logical cores in order to represent more accurately the number of Workers that can run at once, so don't treat this as an absolute measurement of the number of cores in the user's system.

every browser except Internet Explorer. 支持为此，您可以使用 polyfill core-estimator ( demo , blog post )。