I mean, yes, they reduce split times, but raw split times hardly matter in a private citizen's defensive handgun usage, where each and every bullet fired is a use of force for which the firer will be held accountable.
What it does do is reduce muzzle flip to the point that, with proper technique, the dot will remain in the window during recoil.
It also complicates takedown and reassembly, vents gasses upward when shot from retention, and can be noisier for the shooter in some environments.
Most importantly, it makes the gun more ammo sensitive. Comped guns will often struggle to run with el cheapo 115gr ball ammunition, which frequently has barely enough energy to cycle a regular pistol.
Just a thing to be aware of if you decide to run a comped gun.
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