unboxed Vector Bool seems to be 40 times slower than unboxed Array Int Bool

unboxed Vector Bool seems to be 8 times slower than unboxed Array Int Bool. As far as I can tell it is due to the performance difference in accessing array/vector elements. The following is with ghc 9.8.2 on an Intel Mac but I get about the same results on an M2 MacBook with ghc 9.10.1

```
diff prob171a.hs prob171v.hs
1d0
<
8c7
< import qualified Data.Array.Unboxed as AU
--
> import qualified Data.Vector.Unboxed as VU
11a11
>
13,14c13,14
< psqs :: Int -> AU.Array Int Bool
< psqs n = AU.listArray (0,n) (map (psq . ssd) [0..n])
--
> psqs :: Int -> VU.Vector Bool
> psqs n = VU.fromList (map (psq . ssd) [0..n])
29a30,33
>
>
>
>
36c40
< | bv AU.! ssd i = f (i + 1) (res + i)
--
> | bv VU.! ssd i = f (i + 1) (res + i)
gcolpitts@Georges-Mini haskell % ghc -O prob171a.hs
ghc -O prob171a.hs
Loaded package environment from /Users/gcolpitts/.ghc/x86_64-darwin-9.8.2/environments/default
[1 of 2] Compiling Main ( prob171a.hs, prob171a.o ) [Source file changed]
[2 of 2] Linking prob171a [Objects changed]
ld: warning: ignoring duplicate libraries: '-lm'
ld: warning: search path '/opt/local/lib/' not found
gcolpitts@Georges-Mini haskell % ghc -O prob171v.hs
ghc -O prob171v.hs
Loaded package environment from /Users/gcolpitts/.ghc/x86_64-darwin-9.8.2/environments/default
[1 of 2] Compiling Main ( prob171v.hs, prob171v.o ) [Source file changed]
[2 of 2] Linking prob171v [Objects changed]
ld: warning: ignoring duplicate libraries: '-lm'
ld: warning: search path '/opt/local/lib/' not found
gcolpitts@Georges-Mini haskell % ./prob171a +RTS -s
./prob171a +RTS -s
367437474103403
103,112 bytes allocated in the heap
3,272 bytes copied during GC
44,328 bytes maximum residency (1 sample(s))
25,304 bytes maximum slop
6 MiB total memory in use (0 MiB lost due to fragmentation)

Tot time (elapsed) Avg pause Max pause
Gen 0 0 colls, 0 par 0.000s 0.000s 0.0000s 0.0000s
Gen 1 1 colls, 0 par 0.000s 0.000s 0.0002s 0.0002s

INIT time 0.002s ( 0.002s elapsed)
MUT time 8.442s ( 8.444s elapsed)
GC time 0.000s ( 0.000s elapsed)
EXIT time 0.000s ( 0.010s elapsed)
Total time 8.444s ( 8.457s elapsed)

%GC time 0.0% (0.0% elapsed)

Alloc rate 12,214 bytes per MUT second

Productivity 100.0% of total user, 99.9% of total elapsed

gcolpitts@Georges-Mini haskell % ./prob171v +RTS -s
./prob171v +RTS -s
367437474103403
97,888 bytes allocated in the heap
3,272 bytes copied during GC
44,328 bytes maximum residency (1 sample(s))
25,304 bytes maximum slop
6 MiB total memory in use (0 MiB lost due to fragmentation)

Tot time (elapsed) Avg pause Max pause
Gen 0 0 colls, 0 par 0.000s 0.000s 0.0000s 0.0000s
Gen 1 1 colls, 0 par 0.000s 0.000s 0.0002s 0.0002s

INIT time 0.003s ( 0.003s elapsed)
MUT time 61.850s ( 62.264s elapsed)
GC time 0.000s ( 0.000s elapsed)
EXIT time 0.000s ( 0.012s elapsed)
Total time 61.854s ( 62.280s elapsed)

%GC time 0.0% (0.0% elapsed)

Alloc rate 1,582 bytes per MUT second

Productivity 100.0% of total user, 100.0% of total elapsed

gcolpitts@Georges-Mini haskell %
```
[prob171v.hs.txt](https://github.com/user-attachments/files/15995783/prob171v.hs.txt)
[prob171a.hs.txt](https://github.com/user-attachments/files/15995784/prob171a.hs.txt)