> The core of it seems to be that the most efficient way to write locks today is to spin for a bit on contention, then yield to the kernel if you've been waitin

> The core of it seems to be that the most efficient way to write locks today is to spin for a bit on contention, then yield to the kernel if you've been waiting to long. This is an old idea and many real-world mutex implementation have been doing this since forever. Some even let you configure the spin count: https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-initializecriticalsectionandspincount https://learn.microsoft.com/en-us/windows/win32/api/synchapi...