[kaba0]

The JVM can start up in less than 0.1 seconds. Depending on the amount of classes being loaded it is not an issue even for lambda and k8s jobs.

[vips7L]

The VM starts up plenty fast. The slow part is when people use reflective dependency injection containers that take seconds to scan the class path before before executing.

[imtringued]

This is why frameworks like Micronaut exist.

[vips7L]

Micronaut, Quarkus, Avaje Inject, CDI Lite. Plenty of solutions if people would stop reaching for Spring.

[CSDude]

You clearly did not deploy enough classes on Lambda to have more than 10 seconds warmup on a trivial Java based Lambda function.

[bitcharmer]

Warm-up is more a function of invocation count rather than time as you seem to be suggesting here