XTool 2020 (Main Project)

[Razor12911]

vc22_vista_1.2.13: 24688ms 24687ms 24750ms 24750ms 24782ms
vc17_winxp_1.2.13: 24375ms 24172ms 24156ms 24266ms 24359ms
rad_studio_1.2.13: 24359ms 24219ms 24203ms 24265ms 24313ms

vc19_vista_1.2.11: 21734ms 21672ms 21610ms 21843ms 21578ms
vc22_vista_1.2.11: 21391ms 21359ms 21391ms 21343ms 21282ms
vc17_winxp_1.2.11: 21453ms 21469ms 21359ms 21328ms 21360ms

vc22_vista_1.2.8: 21282ms 21281ms 21266ms 21281ms 21281ms

zlib-ng_1.2.13: 7843ms 7797ms 7781ms 7813ms 7828ms

Originally Posted by infovs

Don't really know what you did with 1.2.11/2020-07-18 compile because that was clearly the fastest zlibwapi.dll, at least for me. Yes, I know it is older 1.2.11 version and maybe missing some updated code but I never encountered any problems with it

I didn't do anything to 1.2.11 to make it fast, 1.2.13 itself is the one that is slow as you can see with the benchmarks, winxp compile has little to no impact on performance.

There's an issue opened on github regards to the speed which can be found here.
https://github.com/madler/zlib/issues/820

There was also a security vulnerability discovered in 1.2.11 and I don't know if patching this issue is what made zlib slower or not moving forward.
https://www.cybersecurity-help.cz/vdb/gnu/zlib/1.2.11/

The beauty of xtool is that the user can swap libraries if they prefer to use their own, there's also zlib-ng (utilizes modern CPU features) benchmarks added, as you can see it is faster however I doubt it produces matching crc as standard zlib but good to know nonetheless.