> It loads classes lazily, so your program can start up at `main` very fast, and you only pay for what you use Right, but large Java programs use huge numbers

> It loads classes lazily, so your program can start up at `main` very fast, and you only pay for what you use Right, but large Java programs use huge numbers of classes. They may load thousands of classes just during start-up. > the byte code format is very compact and can be parsed in a single pass, so I don’t think it would be significantly slower than ordinary machine code loading That's what I was wondering about. There used to be a flag in OpenJDK to disable bytecode verification to improve start performance, but it was deprecated in JDK 13 [0] and I think it's since been removed entirely. Its removal is understandable but I still wonder about the performance impact. [0] https://www.oracle.com/java/technologies/javase/13-relnote-issues.html https://www.oracle.com/java/technologies/javase/13-relnote-i...