Loading from ZIP files often is faster (if proper compression method is used in first compression step). This happens because of 2 reasons:
* large archive file is more probably placed in continuous area on disk - so less searches needed to be performed by HDD; HDD head take smaller 'trips' from file to file (each could take around 10ms on average)
* Compressed data takes less space on HDD, so effective transfer rate from HDD to system memory increases up to 2x.