Hello Andrei,
The idea is to not extract the files every time you build. If they are in place already, the tool should recognize that.
The difference in speed between disk IO and CPU /might/ be high enough that (unless the uncompressed file is cached or you round trip it back to the disk) reading from the zip may be faster. I know that on linux there is a way to pass a stream as a file name (I forget what happens under the hood, but bash uses the ">(cmd)" syntax to do it) so you could work with that.
-- ... <IXOYE><
