Ok,
I fixed my test program, and now things seem more reasonable. The
original version was allowing the GC to collect the list in the first
case, but not the second. However, I don't want the list to be
collected. The new version seems to fix that issue. Now the control
uses 40MB and when I change it to list' it uses 64MB. Which is more
reasonable.
main :: IO ()
main =
let list = [1..1000000] :: [Int]
bin = encode list
list' = decode bin :: [Int]
in do putStrLn (show . length $ takeWhile (< 10000000) list)
getLine
putStrLn (show . length $ takeWhile (< 10000001) list)
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