Lightweight Threads

Lightweight threads, also known as "fibers" or "green threads," are a type of thread managed by software within a single application rather than by the operating system. They enable multiple tasks to run concurrently with less resource use compared to traditional threads, making programs more efficient. Think of them as many small tasks sharing a single resource, switching quickly between each, which helps maintain high performance and responsiveness—especially in applications like web servers or games. They are easier to create and manage, but still rely on the main thread, sharing the same memory space.