After gameplay I retimed this run using https://somewes.com/frame-count/ with a console FPS of 60.098813897441 which is the SNES native framerate according to http://tasvideos.org/PlatformFramerates.html and raw video framerate of 30 FPS for a total of 9502 frames or a Console Time of 5:16.728. First Frame set on first Mario sprite during intro cutscene and End Frame set on first frame the last yellow block stops spinning and I'm inside the 6.

I use Snes9x 1.60 with "Super Mario World [J]" ROM.

I time my runs manually with LiveSplit during gameplay.