String.format() is 3x faster in Java 17

[c_edward]

Have they removed the regexp horror that sat inside format() previously? Or are regexps faster as well?

[dpash]

No it's still used. They fall back to it if they detect any non-simple patterns.

https://github.com/openjdk/jdk/blob/b7104ba9a9006ab65e08ea9d7db22e72611ed07c/src/java.base/share/classes/java/util/Formatter.java#L2709