It has nothing to do with time and everything to do with the number of times hot paths get executed. On a server JVM instance a method will have to be executed

It has nothing to do with time and everything to do with the number of times hot paths get executed. On a server JVM instance a method will have to be executed (by default) 10 thousand times before it is compiled. There is also a question of how stable the compilation profile is and how likely deoptimizations are but that's a different story.