I think I found root of problem (for my case, at least). It is because MTA doesn't use GPU for its 2d graphics. In SA-MP only time I sense a lag is when it wants to show green zone mark (which have a graphic icon)
SA-MP, because it is the only one that its run on good FPS on my system. Consider that there is lower chance of hardware spyware in older systems.
it is the only one that runs on good FPS *
Should I also say that I have same problem or up-vote was enough?
https://pastebin.mtasa.com/1000001987
My system is low end so I detected such problem. however single play and SA-MP run smoothly.
Unlike LorDzik I didn't test every MTA server, I test two of them.