hi.
i am working on a sa-mp gamemode project, its going to take about +50k code line, i was wondering is there any way to split the code, for exp put the JOBS related codes to another file and include it , so if i need to edit something about jobs i dont need to check hell a lot code lines to fix a problem!

how can i do that? is it good?
can it cause bad effects like lags or some other bad effects to server?
if u know anything please let me know, thanks!