Bonjour,
Compilation tests continue with the use of CLANG WIN 64 (gimp.org uses this compiler).
The performances are there with CLANG:
For the same filter (very slow), 9 seconds for CLANG vs 52 seconds for GCC to obtain the same result!
Here is the link to download this new version contained in the archive gmic_3.5.0-pre_Gimp-3.0.0-RC1-CLANG-Win64.7z