On Sun, 2 Apr 2023 07:00:51 GMT, Julian Waters <jwat...@openjdk.org> wrote:

> Currently, Link Time Optimization is only available for Java Virtual Machines 
> compiled with gcc. Since the Java VM is the most performance critical part of 
> the Java Platform for obvious reasons, it follows that optimized executables 
> produced for Windows (as Visual C++ is currently the only compiler available 
> for Windows as [JDK-8288293](https://bugs.openjdk.org/browse/JDK-8288293) is 
> still under heavy development) would grant a significant performance boost 
> for Java on Windows as a whole. Flags used for link time optimizations are 
> set to make compiling with it enabled as fast as possible, to avoid the 
> pitfall of very long compile times
> 
> Depends on [JDK-8304893](https://bugs.openjdk.org/browse/JDK-8304893) being 
> integrated first, to prove that link time optimization is viable as an option

Ah, I was thinking that the tests could be used to verify the build times of 
the new option, I guess it isn't needed then. It's still the same default of 
false, it's just that the option now has a new implementation for a new compiler

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PR Comment: https://git.openjdk.org/jdk/pull/13280#issuecomment-1508705873

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