This implements most of #110 — rather than mangling variables as a, b, c etc, the most common characters are used first. This results in slightly better gzip compression. As of this PR, Butternut more consistently generates smaller zipped output than Uglify in mangle-only mode. (Full credit for the idea belongs to Uglify.)
There's a little more we can do, e.g. sorting declarations by number of instances, but the hard part is done now.
(Edit: turns out sorting declarations by number of instances makes it worse. Man, gzip is a mysterious beast.)
This implements most of #110 — rather than mangling variables as
a,b,cetc, the most common characters are used first. This results in slightly better gzip compression. As of this PR, Butternut more consistently generates smaller zipped output than Uglify in mangle-only mode. (Full credit for the idea belongs to Uglify.)There's a little more we can do, e.g.
sorting declarations by number of instances, but the hard part is done now.(Edit: turns out sorting declarations by number of instances makes it worse. Man, gzip is a mysterious beast.)