I'm making a sort of funney mod and when i'm compiling it and running the game, it takes 2 full minutes to load, have frequent memory access violation and have HUGE fps drops, does someone know how to fix it ?

What a freaking idiot i am, i had the debug mode enabled, that's why it lagged so much, a least i can work on the mod now ^^

You also should optimize the .exe file with Mavless Bin, just like original game's .exe file. Mavless Bin can be found in scp-master folder.