Does Go Support Tail Call Optimization, and If So, Under What Conditions?

Tail Call Optimization in Go

Tail call optimization is a technique that can improve the performance of a program by removing the overhead of a function call in tail-recursive function calls. In other words, the technique optimizes the calls made by a function to itself.

Does Go Support Tail Call Optimization?

As of now, Go does not fully optimize tail calls, but it does optimize some cases of tail-recursive function calls. The optimization is implemented in the 6g/8g compilers for specific cases and in gccgo more generally.

There are no plans to change the language to require that compilers implement this optimization in all cases. If you need a tail call, you should use a loop or a goto statement.

How to Explore Optimized Cases

If you are interested in exploring the cases where Go optimizes tail calls, I recommend delving into the open source code for Go. This will provide you with a better understanding of the specific cases where this optimization is implemented.

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