Slowdown in Sonic 1 SMS in NTSC, Not in PAL. Is it Normal?

[Psygho]

In the old days i played sonic 1, a fair bit. Since mine mastersystem 2 needs a recap, away mister goes.
I played in pal, and i can not remember ,slowdows in the game. I like the benefit of ntsc, 60 frames a second.
Noticed quote alot of slowdowns in the bridge level. When the hornet strings, or when walking on the faling bridge platforms.
Later on in jungle, it is the same.

I have world rom, an when slecting pal, i do not have slowdows, but even so a little slower gameplay.

Is of normale to have such slowdowns in ntsc? , i never played it in ntsc as a kid.
Tried diffrent roms, same problem. Iam on latest main and core.

Thanks you!

[SegaSnatcher]

Slowdown in SMS games is not exactly uncommon, especially when you have a fast game like Sonic. Sonic 1 on Genesis even had slowdown and Genesis has a much faster CPU than the SMS.

[Psygho]

I know the are common, but sonic 1 , they are the worst i ever seen..
But i think it is normal. Thank you!

[FoxbatStargazer]

The PAL version has to only spit out 50 frames on near the same clocks vs. 60 for NTSC. So yes the PAL version should have less stutter and be a smoother experience because its asking less of the hardware.

[Yim]

I fired this up on my region-modded PAL Mega Drive, I found there was slowdown on the Bridge running at both 50 and 60Hz, but I think it was worse at 60. The first hornet caused noticeable slowdown on NTSC but only a little if any on PAL. The falling bridge caused slowdown either way.

[Psygho]

Thnx For testing and confirming!
I know it is meant to be.