[Haskell-beginners] code critique

[aditya siram]

I just profiled all three and have not found them to be different.
Maybe I'm reading my profiler output wrong so I've pasted it below.
The compilation command I used was:
ghc -fforce-recomp -XBangPatterns -prof -rtsopts -auto-all -o
ListCrossProductSum ListCrossProductSum.hs

They were all invoked using:
main = print $ sumCheck 5000 [1..10000] [1..10000]

I am running GHC 7.0.1

-deech

sumcheck1:
==========
	  Wed Jul 27 00:26 2011 Time and Allocation Profiling Report  (Final)

	     ListCrossProductSum +RTS -p -RTS

	  total time  =        0.00 secs   (0 ticks @ 20 ms)
	  total alloc =     344,084 bytes  (excludes profiling overheads)

  COST CENTRE                    MODULE               %time %alloc

  sums                           Main                   0.0   40.7
  main                           Main                   0.0   58.3


												 individual    inherited
  COST CENTRE              MODULE
         no.    entries  %time %alloc   %time %alloc

  MAIN                     MAIN
           1           0   0.0    0.0     0.0  100.0
   CAF                     Main
         240           2   0.0    0.2     0.0   99.2
    main                   Main
         246           1   0.0   58.3     0.0   99.0
     sumCheck              Main
         247           1   0.0    0.0     0.0   40.7
      sums                 Main
         248           1   0.0   40.7     0.0   40.7
   CAF                     GHC.Show
         236           1   0.0    0.0     0.0    0.0
   CAF                     GHC.IO.Handle.FD
         176           2   0.0    0.4     0.0    0.4
   CAF                     System.Posix.Internals
         175           1   0.0    0.0     0.0    0.0
   CAF                     GHC.IO.Handle.Internals
         140           1   0.0    0.0     0.0    0.0
   CAF                     GHC.IO.Encoding.Iconv
         134           2   0.0    0.3     0.0    0.3
   CAF                     GHC.Conc.Signal
         131           1   0.0    0.1     0.0    0.1

sumcheck2
=========
  [1 of 1] Compiling Main             ( ListCrossProductSum.hs,
ListCrossProductSum.o )
  True
	  Wed Jul 27 00:27 2011 Time and Allocation Profiling Report  (Final)

	     ListCrossProductSum +RTS -p -RTS

	  total time  =        0.00 secs   (0 ticks @ 20 ms)
	  total alloc =     344,084 bytes  (excludes profiling overheads)

  COST CENTRE                    MODULE               %time %alloc

  sums                           Main                   0.0   40.7
  main                           Main                   0.0   58.3


												 individual    inherited
  COST CENTRE              MODULE
         no.    entries  %time %alloc   %time %alloc

  MAIN                     MAIN
           1           0   0.0    0.0     0.0  100.0
   CAF                     Main
         240           2   0.0    0.2     0.0   99.2
    main                   Main
         246           1   0.0   58.3     0.0   99.0
     sumCheck              Main
         247           1   0.0    0.0     0.0   40.7
      sums                 Main
         248           1   0.0   40.7     0.0   40.7
   CAF                     GHC.Show
         236           1   0.0    0.0     0.0    0.0
   CAF                     GHC.IO.Handle.FD
         176           2   0.0    0.4     0.0    0.4
   CAF                     System.Posix.Internals
         175           1   0.0    0.0     0.0    0.0
   CAF                     GHC.IO.Handle.Internals
         140           1   0.0    0.0     0.0    0.0
   CAF                     GHC.IO.Encoding.Iconv
         134           2   0.0    0.3     0.0    0.3
   CAF                     GHC.Conc.Signal
         131           1   0.0    0.1     0.0    0.1

sumcheck3
=========
	     ListCrossProductSum +RTS -p -RTS

	  total time  =        0.00 secs   (0 ticks @ 20 ms)
	  total alloc =     344,084 bytes  (excludes profiling overheads)

  COST CENTRE                    MODULE               %time %alloc

  sums                           Main                   0.0   40.7
  main                           Main                   0.0   58.3


												 individual    inherited
  COST CENTRE              MODULE
         no.    entries  %time %alloc   %time %alloc

  MAIN                     MAIN
           1           0   0.0    0.0     0.0  100.0
   CAF                     Main
         240           2   0.0    0.2     0.0   99.2
    main                   Main
         246           1   0.0   58.3     0.0   99.0
     sumCheck              Main
         247           1   0.0    0.0     0.0   40.7
      sums                 Main
         248           1   0.0   40.7     0.0   40.7
   CAF                     GHC.Show
         236           1   0.0    0.0     0.0    0.0
   CAF                     GHC.IO.Handle.FD
         176           2   0.0    0.4     0.0    0.4
   CAF                     System.Posix.Internals
         175           1   0.0    0.0     0.0    0.0
   CAF                     GHC.IO.Handle.Internals
         140           1   0.0    0.0     0.0    0.0
   CAF                     GHC.IO.Encoding.Iconv
         134           2   0.0    0.3     0.0    0.3
   CAF                     GHC.Conc.Signal
         131           1   0.0    0.1     0.0    0.1