Does the JVM prevent tail call optimizations?

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This post: Recursion or Iteration? might help.

In short, tail call optimization is hard to do in the JVM because of the security model and the need to always have a stack trace available. These requirements could in theory be supported, but it would probably require a new bytecode (see John Rose’s informal proposal).

There is also more discussion in Sun bug #4726340, where the evaluation (from 2002) ends:

I believe this could be done nonetheless, but it is not a small task.

Currently, there is some work going on in the Da Vinci Machine project. The tail call subproject’s status is listed as “proto 80%”; it is unlikely to make it into Java 7, but I think it has a very good chance at Java 8.

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