fun: save on stack overflow

just reduce the num of samples to avoid it

ocaml/samples.ml

@@ -92,7 +92,7 @@ let () =
   let p3 = p1 *. p2 in 
   let weights = [ 1. -. p3; p3 /. 2.; p3 /. 4.; p3/. 4. ] in
   let sampler () = mixture [ sample0; sample1; sampleFew; sampleMany ] weights in
-  let n = 1_000 in 
+  let n = 1_000_000 in 
   let samples = List.init n (fun _ -> sampler ()) in 
   match unwind samples with
     | Error err -> Printf.printf "Error %s\n" err