[nullwasamistake]

JVM is very smart about locking. My knowledge is limited but this is a great article. https://shipilev.net/jvm/anatomy-quarks/19-lock-elision/

[chrisseaton]

I work with the JVM at Oracle and I’ve given talks about the lock elision algorithm. It doesn’t do what you think it does and what it does do is not related to lock-free like you think it is.