Fastgen2

[wsmoses]

Reduces from 4ms down to 650us. Still far from the 5.5us possible.

Currently only working forward diff, can also get augmented fwd. Reverse requires some thought.

[codecov-commenter]

Codecov Report

Base: 76.09% // Head: 75.77% // Decreases project coverage by -0.31% ⚠️

Coverage data is based on head (1ee2c6c) compared to base (e8893b7).
Patch coverage: 81.31% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #532      +/-   ##
==========================================
- Coverage   76.09%   75.77%   -0.32%     
==========================================
  Files          17       17              
  Lines        5690     5966     +276     
==========================================
+ Hits         4330     4521     +191     
- Misses       1360     1445      +85     

Impacted Files	Coverage Δ
src/Enzyme.jl	86.04% <ø> (ø)
src/compiler.jl	77.27% <81.31%> (+1.17%)	⬆️
src/compiler/orcv1.jl	0.00% <0.00%> (-76.93%)	⬇️
src/compiler/utils.jl	57.53% <0.00%> (-38.36%)	⬇️
src/compiler/validation.jl	57.68% <0.00%> (-4.39%)	⬇️
src/typetree.jl	88.09% <0.00%> (-0.80%)	⬇️
src/compiler/orcv2.jl	66.32% <0.00%> (+4.42%)	⬆️
src/compiler/pmap.jl	82.85% <0.00%> (+5.31%)	⬆️

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[vchuravy]

Is this still needed with fastgen3?