Computational threads scheduled by a run-time library
Not to be confused with green thread.
In computer programming, a virtual thread is a thread that is managed by a runtime library or virtual machine (VM) and made to resemble "real" operating system thread to code executing on it, while requiring substantially fewer resources than the latter.
Virtual threads allows for tens of millions of preemptive tasks and events on a 2021 consumer-grade computer,[1] compared to low thousands of operating system threads.[2] Preemptive execution[3] is important to performance gains through parallelism and fast preemptive response times for tens of millions of events.
Earlier constructs that are not or not always preemptive, such as coroutines, green threads or the largely single-threaded Node.js, introduce delays in responding to asynchronous events such as every incoming request in a server application.[4]
^Rudell, Harald (2022-03-19). "massivevirtualparallelism".
^baeldung (2022-01-02). "Maximum Number of Threads Per Process in Linux | Baeldung on Linux". www.baeldung.com. Retrieved 2022-03-30.
^"Go 1.14 Release Notes - The Go Programming Language". go.dev. Retrieved 2022-03-30.
^Node.js. "Don't Block the Event Loop (or the Worker Pool)". Node.js. Retrieved 2022-03-30.
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