Namely, if the file with a very long line is searched after most other files, then the performance impact will be small, since the large buffer will be used for a comparatively small number of files.

This is the second part of our article series explaining how V8 parses JavaScript as fast as possible.

The window.requestIdleCallback() method queues a function to be called during a browser's idle periods. This enables developers to perform background and low priority work on the main event loop, without impacting latency-critical events such as animation and input response.