Not that I prefer Java where performance is important, but profile based optimization combined with optimizing across <i>translation units</i> is non-trivial.  C&#x2F;C++ compilers have been increasing support for these more recently.  Jan Hubicka&#x27;s blog has a good example [1].<p>I have to wonder if they plan to keep the codebase portable though.  One of the major benefits of Java was that nearly everything has a JVM.<p>[1] <a href="http:&#x2F;&#x2F;hubicka.blogspot.com&#x2F;2014&#x2F;04&#x2F;linktime-optimization-in-gcc-2-firefox.html" rel="nofollow">http:&#x2F;&#x2F;hubicka.blogspot.com&#x2F;2014&#x2F;04&#x2F;linktime-optimization-in...</a>