Why is there no GIL in the Java Virtual Machine? Why does Python need one so bad?

Question

I\'m hoping someone can provide some insight as to what\'s fundamentally different about the Java Virtual Machine that allows it to implement threads nicely without the need

Answer 1

In this link they have the following explanation:

... "Parts of the Interpreter aren't threadsafe, though mostly because making them all threadsafe by massive lock usage would slow single-threaded extremely (source). This seems to be related to the CPython garbage collector using reference counting (the JVM and CLR don't, and therefore don't need to lock/release a reference count every time). But even if someone thought of an acceptable solution and implemented it, third party libraries would still have the same problems."