"Bun is faster than Node.js - that's not marketing. Raw HTTP throughput, startup time, and tooling speed are all measurably better. But in real-world backend applications, performance is almost never limited by those things."
"If those are your bottlenecks, switching from Node.js to Bun will not improve your latency. The benchmark won't tell you that. This article will."
"Bun is fast at specific things: Startup time - cold starts are noticeably quicker than Node.js, Raw I/O throughput - built on JavaScriptCore and native APIs, file and network I/O is faster."
"The Event Loop doesn't speed up your DB query. It just doesn't sit around waiting for it. That distinction matters."
Bun demonstrates superior performance over Node.js in areas like startup time, raw I/O throughput, and tooling efficiency. However, real-world applications often face bottlenecks from database query latency, connection pool exhaustion, and blocking CPU work. Switching from Node.js to Bun may not resolve these issues. Immediate improvements can be achieved by migrating to bun install and bun test. The Event Loop in both runtimes operates similarly, allowing for non-blocking I/O but does not enhance database query speeds.
Read at howtocenterdiv.com
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