For example, I saved the ZPL data that our application outputs to a file just to see what was being sent and it looks like this
 
^XA
^GFA,119900,119900,100,0000000.... lots more data.....
^XZ
 
The file is actually 235kb in size. Just out of interest I did a search and replace of 0 in the file as there appeared to be an awful lot of them
and it made 200,000 matches! So I'm assuming compression could drastically reduce the size of the file maybe?
 
I read in the notes from Programming Guide for ZPL II by Zebra that
 
"A comma in the data pads the current line with 00 (white space), minimizing the data sent"
 
and also it mentions compression types
 
A = ASCII hexadecimal (follows the format for other download commands)
B = binary (data sent after the c parameter is strictly binary)
C = compressed binary (data sent after the c parameter is in compressed binary format. The data is compressed on the host side using Zebra’s compression algorithm. The data is then decompressed and placed directly into the bitmap.) Default: A
 
So I was thinking that maybe this could be useful? But I'm not sure how to implement it.
 
Thanks
Tim