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yes, if the method was already compiled into a big or medium size method (in term of assembly code). JITs will not try to inline it again otherwise you will have too much code dupl…

yes that's the idea ! but your example is wrong because c1 never compile a branch that was not executed before.

It will be freed but when c2 has emitted the new machine code, you can still have code on the stack of the user threads that use the code compiled by c1. When no more threads will …

-XX:-TieredCompilation is the magic option to disable tiered compilation. Beginning with Java 8, instead of having the VM to magically choose between using the client JIT (c1: thin…