Afraid of Java cold starts in Serverless? Fear not, Java is fast
summary
Claims that Java is inherently slow for AWS Lambda get tested with measurements and demos: a bare minimal Java lambda starts in ~70 ms, a small servlet on Piranha Cloud hits ~330 ms, while GlassFish and Spring Boot examples take seconds. The session builds and zips deployable artifacts, compares Quarkus with GraalVM native vs JVM modes, shows a Piranha Cloud container serving requests without HTTP listeners, and explains JVM tweaks like class data sharing and tiered compilation and their actual impact on cold starts.
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chapters (7)
- 0:00Introduction
- 2:36What is AWS Lambda
- 12:35Java cold starts in Lambda
- 23:21Java frameworks for speed
- 39:50Optimizing JVM and Lambda
- 47:01Native compilation and CRaC
- 49:10Q&A
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