Userspace

Feb 27, 2026 Engineering

Threads: OS Threads and User-Space Threads

Every backend engineer eventually confronts the same question: how do I handle 100,000 concurrent connections without spinning up 100,000 OS threads? The answer lies in understanding the fundamental…

Mar 07, 2025 Engineering

Green Threads: User-Space Thread Scheduling

Green threads are threads scheduled entirely in user space rather than by the operating system kernel. Your application maintains its own scheduler, manages its own thread control blocks, and decides…