on stack replacement vs optimal compiled code

Andy Nuss andrew_nuss at yahoo.com
Tue May 21 16:10:40 PDT 2013


If a long looping function gets the benefit of "on stack replacement", and later hotspot determines that it has been executed more than 10,000 times, will it be recompiled again?

I read somewhere that OSR code is about half as fast as optimally jitted code.  I read somewhere else that Oracle says there is never a need to warmup critical functions for hotspot.

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