tvl-depot/users/grfn/xanthous/test/Xanthous/Data/MemoSpec.hs
Griffin Smith c19e3dae5f feat(xanthous): Memoize characterVisiblePositions
Memoize the return value of characterVisiblePositions to a new,
semi-abstracted "memo" field on the GameState, recalcuclated if the
character position ever changes. I'm 90% sure that the perf issues we
were encountering were actually caused by characterVisiblePositions
getting called once for *every tile* on draw, but this slightly larger
change also makes the game perform relatively-usably again.

Since this is only recalculated if the character position changes, if we
ever get non-transparent entities moving around without the characters
influence (maybe something building or knocking down walls?) we'll have
an issue there where the vision won't be updated as a result of those
changes if they happen while the character is taking a non-moving action
- but we can cross that bridge when we come to it.

Change-Id: I3fc745ddf0014d6f164f735ad7e5080da779b92a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3185
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2021-06-12 18:57:52 +00:00

19 lines
706 B
Haskell

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module Xanthous.Data.MemoSpec (main, test) where
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import Test.Prelude
import Test.QuickCheck.Instances.Text ()
--------------------------------------------------------------------------------
import Xanthous.Data.Memo
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main :: IO ()
main = defaultMain test
test :: TestTree
test = testGroup "Xanthous.Data.MemoSpec"
[ testGroup "getMemoized"
[ testProperty "when key matches" $ \k v ->
getMemoized @Int @Int k (memoizeWith k v) === Just v
]
]