I love the AUR, but every single time I have to wait for it to compress Firefox nightly, and then wait for it to immediately decompress it again because the only reason I was building the package in the first place was to install it I about lose my mind. Hopefully this helps, but I really wish AUR helpers would just disable compression and call it a day so I don't have to go mess with config files that would also change my manual package building routine.
EDIT: nevermind, this doesn't seem to have made this the default for building packages locally, just for ones you download from the official repos. Guess I'll go change that by hand and then still be sad that I can't have it easily disabled entirely for AUR helpers but build my packages with compression.