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is it worth learning golang?
(sh.itjust.works)
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I had to containerize an older java app. It sucked, java would take all the memory you gave it regardless, so it was hard to determine memory requirements/limits. It had pretty slow start although this wasn't an issue for us, logging formatting was a pain. All this was overcome (not by upgrading), it was just a pain.
I suspect this isn't true of modern java though - I'd suspect with the hype kubernetes went through a few years ago that it's just fine now a days.
Yeah I wouldn't say a java service taking multiple seconds to boot up being scalable the same way that any other compiled language will be.
There are also the huge "legacy" frameworks that slow down java, the auto magic and more non features that make maintaining any real world java application a pain.