The Thread Pool Trap: Why Increasing UV_THREADPOOL_SIZE Can Make Node.js Slower
More threads should mean more performance — but in Node.js, increasing UV_THREADPOOL_SIZE can actually reduce throughput. Here's why.
#libuv
6 posts tagged with "libuv"
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Threadpool Exhaustion in Node.js — The Silent Killer Behind Slow APIs
How libuv's tiny threadpool can quietly throttle your Node.js APIs — and why scaling it blindly can make things worse.
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setTimeout(0) vs setImmediate(): The Event Loop Trap That Exposes Senior Engineers
Why setTimeout(0) and setImmediate() behave differently — and how understanding event loop phases separates senior engineers from the rest.
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The 6 Phases of the Event Loop — Why Your Mental Model of Node.js Is Probably Wrong
A deep dive into Node.js event loop phases, why timers are not precise, and how poll phase behavior shapes real-world performance.
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Inside libuv: The Hidden Engine Behind Node.js Scalability
A deep dive into libuv, the system-level engine that powers Node.js concurrency, from epoll to threadpools.
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The Event Loop Is Just a Scheduler — What Node.js Actually Executes (and What It Doesn’t)
Most engineers misunderstand the Node.js event loop. It doesn’t run async work—it schedules callbacks. This deep dive explains what really happens under the hood.