A Deep Dive into JVM Start-Up

[@VuLinhAssassin]

My brain simply melted after having watched how JVM performs "magic". Just magic. No other options xD

[@lapissea1190]

One thing that I find useful for startup time improvements is a preload utility where you give it a class and optionally static function name + dummy args. The function just spawns a new task/vthread that forces the class to fully init and run the specified function if provided. Best used in a static initializer of a class that whos functionality will be loading non trivial sections of code. Note: there is a limit to this. There seems to be a bottleneck *somewhere* in the JVM class loading pipeline where no matter how many threads are asking for a class to be loaded, it will not get any faster.

[@nisachannel7077]

Loved the deep dive. ❤

[@TinyDeskEngineer]

How in the world did I manage to think this video wasn't about Java before I clicked on it?

[@donwinston]

💪

[@JavaWedsPython]

First comment by a Java lover.

[@donwinston]

What is the connotation of JavaWedsPython?

[@d4rkn355]

@@donwinston jython

[@toby9999]

I hate Java with a vengence. I hate everything about it, including conceptually (vm, forced oop, everything is an object, the language itself, etc) and also all of its ecosystem and tooling. I loath it so much that I retired early to avoid it. Worst thing I've encountered in 40 years of developing software. If I were absolutely forced to choose a vm type language, it would be C#.

[@spomytkin]

👍

[@robby3467]

The first word that comes to mind... BLOAT... I hate BLOAT.

[@monabbar007]

Spoiler ⚠️ alert, If you want to know more about jvm, do your own research, or else everything will now make sense.

[@sameerbiradar2787]

i dont understand more than 60%

[@pyyrr]

meanwhile, jvm is still starting...

[@lossomob3000]

Snarky nitpick: Does System.out.println(“Hello World!”) really compile, with typographic quotes and all? Or do we still need to use System.out.println("Hello World!") like cavemen? :)

[@xl000]

How often do you copy code from slides ?