Dynamic FPS Optimization

Dynamic FPS Optimization

OMW Version 0. 32: Added Grid List and Automatic Grid List Addition. These features are now enabled together by default and the Grid List is not accessible outside of the game. See below for more information.

DFPSO is an MWSE plugin inspired by Foggy Old Ebonheart and Simple FPS Optimizer as well as the older Morrowind FPs Optimizer that dynamically changes View Distance at runtime in order to alleviate the performance cost of heavily draw-call-bound areas like Old Ebonheart. DFPSO is entirely script-based and does not modify game data, does incremental changes to View Distance and works across the entire game. It also features an MCM with several options to set for users.

How it works

In DFPSO, a script checks the current frame's frametime (the length of time it took to render) at regular intervals. The frametime value is compared to a target framerate (with some leeway) - if it's higher than expected, View Distance is reduced, if it's lower, it is increased.

MCM Values:

• []Smooth Mode: Toggles smooth, per-frame adjustment of View Distance. Requires reload to enable or disable.

• []Smooth Aggression: Determines how aggressively the Smooth Mode adjustment changes View Distance. Does nothing without Smooth Mode.
  • []Target Framerate: This determines the framerate the script will try to reach. Default is 60, recommended to set slightly lower than your average framerate in non-stressed areas.
    • []Tolerance: Determines upper and lower bounds for the frametime in which no changes to View Distance will be made. Given as percentage value above and below the Target Framerate, computed from frametime.
      • []Aggression: Determines how many increments of downward or upward change are made to the View Distance per change instance. Increasing this risks overshoot but may help in very heavily stressed setups.
        • []Checkrate: This setting controls how often the current frametime is measured and how often View Distance can be changed, given as checks per second. Only updates when reloading a save.
          • []Prediction: This feature will compare the frametimes measured during the last two checks to detect lowered performance before it exceeds the tolerance bounds and adjust View Distance down to compensate. Enabling this may prevent framerate drops but lead to overly aggressive View Distance lowering.

            []Prediction Tolerance: Determines how large the drop in performance can be before triggering the Prediction View Distance change, given in percentage of Tolerance.