Documentation is on the glom wiki:

http://www.glom.org/wiki/index.php?title=Development/OnlineGlom

We are using the default GWT compilation option of compiling the Java code to
obfuscated JavaScript. The reason for this is covered by this snippet from the
GWT developer docs:

“obfuscation reduces the size of the generated JavaScript files, making them
faster to download and parse”

https://code.google.com/webtoolkit/doc/latest/FAQ_DebuggingAndCompiling.html