In IPP 7.0 beta, new compression levels are added into ipp_zlib, specifically this is consistent with standard zlib distribution
Before IPP 7.0 beta
In IPP 7.0 beta
As indicated in IPP webinar, i also observed good improvements in the speedup by using IPP 7.0 beta zlib functions.
If you are not used IPP 7.0 beta yet, download and test it;
Please share information about performance improvements by using IPP 7.0 beta ipp_zlib functions.