Tag: 성능
All the articles with the tag "성능".
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Spring Boot #6 — Looking Into JVM Memory and GC, and a Connection Pool Bottleneck Experiment
I watched the heap with jps and jstat, and printed out GC logs. From the heap structure split into Young/Old, to the contrast with C's manual memory management, to reproducing a bottleneck where reducing the DB connection pool to 1 turned a 2-second task into a 6-second one.
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The Day Before Launch, I Overhauled Performance — And One Thing I Never Fixed
A tuning retrospective from the day before launching a solo-developed app: TTFB 3.15s → 10ms, LCP 22.1s → 1.4s. And the story of the PWA bottom system bar color I burned a whole day on but never fixed on the web.
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The Screen Froze for a Moment When I Tapped — Tracing the Cause
Tracing an intermittent tab-switch stutter, I confused my tools (Lighthouse ≠ INP), misdiagnosed Realtime, fixed an obvious waste with little payoff, and concluded it wasn't a single bug but a structural cost of SPA navigation. A retrospective that keeps the failures in.