GTA 5 decompression speed with Pzlib

[chum]

Hey guys i just tested Just Cause 3 and GTA 5 with pzlib. Just Cause 3 works with reflate libs inside Pzlib for compression but with GTA 5 if i use reflate libs it give CRC error during decompression. Without reflate libs it decompress fine but the speed is somewhat slow compared to Just Cause 3.

Just Cause 3 is 60GB-> and compress to 28GB. Decompression time is around 25-28~ minutes in my system.

GTA 5 is 70GB-> compress to 42GB and take 60+ minutes to decompress.

Is everyone facing slower decompression with GTA 5 against other similar games? Some way to improve it?