KA performance

[ChrisRackauckas]

@vchuravy

[ChrisRackauckas]

Is there a good rule of thumb on when we should unroll things like https://github.com/SciML/DiffEqGPU.jl/pull/69/files#diff-90f5ad9f4eb9fd418f70216b94a00be1R51 ?

[codecov]

Codecov Report

Merging #69 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master     #69   +/-   ##
======================================
  Coverage    0.00%   0.00%           
======================================
  Files           1       1           
  Lines         238     238           
======================================
  Misses        238     238           

Impacted Files	Coverage Δ
src/DiffEqGPU.jl	0.00% <ø> (ø)

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