String.format() is a lot faster in Java 17

[Paul Clapham]

I just saw this post on Heinz Kabutz's blog -- perfomance issues are one of the things he often writes about.

https://www.javaspecialists.eu/archive/Issue294-String.format-3x-faster-in-Java-17.html

Most people won't want to upgrade to Java 17 to take advantage of this improvement, but it's interesting to see what the Java crew is doing in the background to improve the language. It made me wonder what else they have been up to which wasn't mentioned in the release documentation!

[Campbell Ritchie]

They also upgraded

while (...)
{
   s += "Campbell";
}

...and similar. That was back in Java9. They are obviously tinkering and improving things quietly all the time.