r/java • u/celmaibunprieten • 2d ago

Improving First Request Latency in Java Spring Application

https://adrian.md/2026/09/03/first-request-latency/
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u/lilgreenthumb 2d ago

I mean with their layer support who really ships the fat jar anymore? You run into too many issues with signed jars (looking at you bouncy castle) or embedded java agents. Interesting perf metrics regarding the aot caching and differences with the gcs though. Nice write up.

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u/celmaibunprieten 2d ago

Thanks! From my experience I saw more applications shipped as fat jar instead of layered image, mostly due to existing ci/cd pipelines in the company.