Java runs a Hello World, cold, in a packaged JAR, in about 40ms. What you've seen isn't JVM startup but programs that do a lot at initialisation (like MS Word), as many Java programs like to do (because they often expect to run for a long time, so they don't care about startup time).
I have not worked with Java in a long time but I seem to remember that most Java programs also accrue a good amount of dependencies and some of them have their own init routines.
That adds up, fast. No idea how is it nowadays, admittedly. Maybe a ton of optimization work was done.
Obviously it depends on a bunch of factors but -- not on my machines. They are all with Intel and AMD CPUs and I don't use M-series Macs.
Never saw an instantly starting JVM in my life though.
Java runs a Hello World, cold, in a packaged JAR, in about 40ms. What you've seen isn't JVM startup but programs that do a lot at initialisation (like MS Word), as many Java programs like to do (because they often expect to run for a long time, so they don't care about startup time).
I have not worked with Java in a long time but I seem to remember that most Java programs also accrue a good amount of dependencies and some of them have their own init routines.
That adds up, fast. No idea how is it nowadays, admittedly. Maybe a ton of optimization work was done.
> I have not worked with Java in a long time > No idea how is it nowadays, admittedly.
Yes, between Java 8 and modern java there were changes to the GC, startup time, JIT and probably more.
If you want, it java should now start pretty quickly.