According to Google engineers, Chrome 57 will temporarily delay a background tab's JavaScript timers if that tab is using more than 1% of a CPU core. Further, all background timers are suspended ...

Google Chrome engineers are working on a throttling system that would impose a limitation on the number of JavaScript (timers) operations that unfocused background tabs can perform. According to ...

which offloads a large part of the optimizing compilation phase to a background thread. Previously, Chrome compiled JavaScript on the main thread, where it could interfere with the performance of ...