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optimize Natural/fold in the strict case #2585

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merged 9 commits into from
Jun 12, 2024
+18 −6
Merged

optimize Natural/fold in the strict case #2585

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e36815e
optimize Natural/fold in the strict case
winitzki May 11, 2024
89c54f7
remove tabs
winitzki May 11, 2024
7bbee59
fix syntax in do block
winitzki May 11, 2024
9dcac33
Update Normalize.hs
winitzki May 12, 2024
827fc45
adding wip code to Eval.hs
winitzki May 14, 2024
ed07195
fix code
winitzki May 14, 2024
9fae7ff
Merge branch 'main' into feature/optimize_natural_fold
winitzki May 31, 2024
33efa78
remove dummy change
winitzki May 31, 2024
be07882
Merge branch 'main' into feature/optimize_natural_fold
winitzki Jun 1, 2024
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9 changes: 7 additions & 2 deletions dhall/src/Dhall/Normalize.hs
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Original file line number Diff line number Diff line change
Expand Up @@ -211,8 +211,13 @@ normalizeWithM ctx e0 = loop (Syntax.denote e0)
strict = strictLoop (fromIntegral n0 :: Integer)
lazy = loop ( lazyLoop (fromIntegral n0 :: Integer))

strictLoop 0 = loop zero
strictLoop !n = App succ' <$> strictLoop (n - 1) >>= loop
strictLoop !n = strictLoopShortcut n (loop zero)
strictLoopShortcut 0 !res = res
strictLoopShortcut !n !res = do
x <- res
let next_res = App succ' <$> res >>= loop
y <- next_res
if judgmentallyEqual x y then res else strictLoopShortcut (n - 1) next_res
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lazyLoop 0 = zero
lazyLoop !n = App succ' (lazyLoop (n - 1))
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