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Old 26 April 2018, 18:25   #4
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Join Date: Aug 2005
Location: Germany
Age: 46
Posts: 11,268
How to check the amount of lag frames a game has

RetroArch has the ability to pause a core and advance it frame by frame. Perform the following steps to determine the amount of lag frames of a game:
  • Pause emulation (press ‘p’ button on keyboard).
  • Press and hold the jump button on the controller.
  • Advance emulation frame by frame (press ‘k’ button on keyboard) until the character jumps.
The number of k presses before you get a reaction should be the number of lag frames you can safely remove with run ahead.
Amazing. This works just great with the new Runahead latency reduction. The original ingame lag is just gone in tested games like Super Mario World (2fps), Aladdin Mega Drive (1fps) or Jackie Chan PC-Engine (1fps).
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