This mod reverts some shader-related files to their U95.4 versions and disables unnecessary and (in some cases) expensive post-processing effects such as:

• Ambient occlusion (this one is particularly visual-subtle, performance-obvious in terms of noticeability)
  
• Chromatic aberration
  
• Lens dirt
  
• Bloom
  
• Fast Approximate Anti-Aliasing (FXAA)
  
• Shadow blurring (might merely be placebo)
  

The net result is a modest boost in maximum framerate, as well as generally more consistent framerates. In other words, less rendering lag spikes when the scene changes rapidly (such as when turning or sprinting).

Background
If you have ever used the "test" version of a certain DX11 shader mod that used to be available on this site, you would have noticed that it provided a noticeable boost in performance but at the steep cost of disabling color grading and contour functionality as well.
In addition, if you still have that mod and have attempted applying it on the game as at Update 96, you will likely have noticed that shadows have become abnormally dark - far darker than they ever were in Update 95.6 and before.
This mod attempts to strike a balance by disabling only the 'expensive' post-processing effects and permitting the remaining effects to be executed as usual. While the performance gain is not as large as the test version of the abovementioned mod, it is still a noticeable improvement over the stock game configuration on less powerful graphics cards. It also achieves this without causing the new "dark shadow" issue encountered using the other mod.

Mod Type
.pdmod (Installation requires Bundle Modder)

Mod Application Speed
Very fast (~2 seconds)

Mod Conflicts
The following mods are incompatible with this mod and must be uninstalled first:

• Lower Shadow Map Mod
  
• DX11 Shaders Fix
  
• Zdann's Graphics Tweak
  

Notes

• As with all non-audio .pdmod-based mods, you must uninstall it before you allow Payday 2 to update, otherwise your bundles will become corrupted and you will have to redownload the bundles through Steam.
  
• The shader-related files are reverted to their U95.4 versions because applying only the configuration changes causes shadows to become extremely dark. This is due to a change that OVK introduced in U96.
  
• Shoutout to Matthelorz for the test version which (inadvertently) demonstrated the possible performance gains that could be achieved by disabling post-processing effects (which ultimately inspired me to create this mod)  :)
  

Image Credit https://fcw.com/blogs/lectern/2014/09/kelman-performance-testing.aspx

Changelog

0.0.1.1
Initial (public) release