While SA-MP Addon has a handful of game engine fixes that render higher frames per second, there are multiple reasons why the greater SA-MP community discourages its use. One of them being bloated for no reason, and the fact that it is relaying some sort of data to an unknown point for an unknown reason.
You can also use this SAMP Server Browser, it has a handy option for quick version swapping, I've used it a lot during the development of RCRP 3.0 to swap between the dev server and the main server.
You could try this mod at your own risk but I highly recommend SA-MP addon because I know it works even if the most recent updates are trash.
But if you are certain you do not want to use SA-MP addon, you can use this custom launcher which is not written in Java.
Issues I've had with SAMP Addon include /blindme not working and the game resetting to the highest graphics settings (and I did not want 1920x1080 resolution). Furthermore:
There are alternatives:
Which didn't work for me.
And the first link worked like a charm.