JVM is neither compiled nor interpreted(abe-winter.github.io)
abe-winter.github.io
JVM is neither compiled nor interpreted
https://abe-winter.github.io/rant/2017/10/24/jvm-neither.html
2 comments
I haven't seen such bullshit for a long time. Lots of negative claims with no serious data backing up any of these claims looks totally bullshit and amateur.
There's a better write-up, which escapes me at the moment, which clarifies the smoking gun of Java's painful slow performance under certain circumstances as rooted in L2 cache churn, due to the deadly combination of the java.lang.String class' immutability in memory, and all java.lang.Object instance references (literally everything, including the references themselves) being passed around as messages which are... you guessed it, Strings.
This is why a GUI on a Desktop java runtime environment feels slow (no one cares about your Swing app, and go out and buy four times more RAM (64GB maybe? oh, why not?) just for your IDE), but server processes, while also memory-hungry, are capable of reasonable performance in exchange for marginal code readability (even if verbose), when processing mostly primitives, threaded in parallel (yay, stateless protocols!), and packed into highly normalized formats serialized as JSON data structures, or XML/HTML DOMs, handled by proven libraries with good API's.