First measurement

app/Main.hs

@@ -1,13 +1,33 @@
 module Main (main) where
 
+import Control.Exception
 import Data.Vector qualified as V
 import Poly
+import System.Random
+import System.TimeIt
 
 main :: IO ()
 main = do
-  let f :: Poly Int = Poly (V.fromList [1, 2, 3])
-  let g :: Poly Int = Poly (V.fromList [4, 5])
-  putStrLn $ "f: " <> show f <> ", g: " <> show g
-  putStrLn $ "f + g: " <> show (f + g)
-  putStrLn $ "f * g: " <> show (f * g)
-  putStrLn $ "Karatsuba f * g: " <> show (normalize $ karatsubaMult f g)
+  do
+    let f :: Poly Int = Poly (V.fromList [1, 2, 3])
+    let g :: Poly Int = Poly (V.fromList [4, 5])
+    putStrLn $ "f: " <> show f <> ", g: " <> show g
+    putStrLn $ "f + g: " <> show (f + g)
+    putStrLn $ "Naive f * g: " <> show (f * g)
+    putStrLn $ "Karatsuba f * g: " <> show (normalize $ karatsubaMult f g)
+
+  putStrLn ""
+  experimentFor 500
+  experimentFor 1000
+  where
+    experimentFor n = do
+      setStdGen $ mkStdGen 10
+      let randomPoly size = Poly <$> V.replicateM size (randomRIO (-100, 100))
+      putStrLn $ "Size " <> show n
+      f :: Poly Int <- randomPoly n
+      g :: Poly Int <- randomPoly n
+      putStrLn "naive:"
+      _ <- timeIt $ evaluate (f * g)
+      putStrLn "Karatsuba:"
+      _ <- timeIt $ evaluate (f * g)
+      putStrLn "Finished"

mathematical-algorithms.cabal

@@ -20,6 +20,8 @@ common deps
     build-depends:
         base ^>=4.17.2.1,
         vector,
+        random,
+        timeit,
 
 library
     import:           warnings, deps