I've learned that for gzipping css and js files on the fly, it's best to keep the default level -1
.
Now I'm serving static pre-compressed gzip files and I wonder if it's better to use a higher level for creating these.
Is level -9
ok then? Or should I use 4 or 5 as some even suggest to use for gzipping on the fly?
Well, it all comes down to the question if decompressing a highly compressioned file takes the same time as compressing it.