Oliver Bandel wrote:
> Why is the Ocaml-program so slow,

The tool of choice if you don't understand where your program spends it's time 
isn't mutt, but gprof or ocamlprof.

The main problem may be here:

>    let firstsplit = Str.bounded_split (Str.regexp "[ \t]+") line 3

If Str.regexp is implemented in the same way as Pcre.regexp (where I first 
encountered this problem), the compiler regards the call to the external C 
library prividing the regexp code as an unsafe operation that may have side 
effects and so must be repeated on every invocation of Str.bounded_split.
Try moving it to the toplevel:

let tabre = Str.regexp "[ \t]+"

and then change all your functions to use it like:

     let firstsplit = Str.bounded_split tabre line 3

Yours, Florian.

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