About: Virtual threads

In computer programming, virtual threads are threads that are scheduled by a runtime library instead of natively by the underlying operating system (OS). Virtual threads allows for tens of millions of preemptive tasks and events without swapping on a 2021 consumer-grade computer.., compared to low thousands of operating system threads. Preemptive execution is important to performance gains through parallelism and fast preemptive response times for tens of millions of events. Earlier constructs that are not preemptive, such as coroutines or the largely single-threaded Node.js, introduce delays in responding to asynchronous events such as every incoming request in a server application