483f32edd8
This feature produced counterintuitive behavior and confused users. See discussion at #770. As pointed out by @tydeu, it is not too much work to write `Id.run <|` before the `do` when we want to use the `do` notation in pure code. closes #770
16 lines
383 B
Text
16 lines
383 B
Text
def build (n : Nat) : Array Unit := Id.run <| do
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let mut out := #[]
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for _ in [0:n] do
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out := out.push ()
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out
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@[noinline] def size : IO Nat := pure 50000
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def bench (f : ∀ {α : Type}, α → IO Unit := fun _ => ()) : IO Unit := do
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let n ← size
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let arr := build n
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timeit "time" $
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for _ in [:1000] do
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f $ #[1, 2, 3, 4].map fun ty => arr[ty]
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#eval bench
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