>>718907535
Run-ahead is for laggy games, not laggy setups.
It's almost never recommended to use run-ahead as it increases input lag variance for slightly lower raw input lag. It's also not accurate to original hardware, has limited implementation depending on internal game lag and how intensive it is to run, and can cause various issues
The only rare edge case in which it may be worth it (and even then, not really), is games that are easy to run accurately, have significant inherent gameplay lag (5+ frames), and where reactions are more important than timing. In these case, the raw input lag improvement is so large that it could (arguably, but not really) outweigh the increase in input lag variance that it brings.
Run-ahead is not going to remove any inherent lag from your setup or V-Sync lag, which will usually be 2-3 frames at least. So no, you are almost certainly not getting original hardware/MiSTer CRT level input lag, and you certainly aren't getting that level of input lag consistency either.
