[wp-hackers] JavaScript concatenation and compression - any documentation?

[Andrew Nacin]

>
> Is it turned on by default for my plugins and themes?


No. It can't be turned on, period. Two versions of core scripts are
committed the core -- a development version, and a compressed version
created by core developers using YUI. The compressed version is used unless
a debug constant is set in wp-config.php. The core only concatenates core
scripts.