I have written an ocaml program, which is about an order of magnitude
slower than a similar C program, and now I am wondering what to do.
According to gprof, I have neiter written nor called most of the
top-scoring functions in my program:

  %   cumulative   self              self     total           
 time   seconds   seconds    calls  ms/call  ms/call  name    
  9.82      2.76     2.76  9822122     0.00     0.00  Verzeichnis_code_end
  9.00      5.29     2.53     3275     0.77     0.77  mark_slice
  8.15      7.58     2.29    17860     0.13     0.54  Stra$dfen_e_i_l_rec_129
  8.04      9.84     2.26 23232718     0.00     0.00  string_equal
  7.44     11.93     2.09     4088     0.51     0.62  sweep_slice
  5.73     13.54     1.61   390646     0.00     0.01  oldify
  4.16     14.71     1.17 22241546     0.00     0.00  Eintrag_code_begin
  3.88     15.80     1.09                             Stringhilfsfunktionen_code_begin

Only the third and fourth entry seem to do anything "useful", the rest
looks like administrative overhead to me. What are these functions
doing?
Are there any general hints on how to write ocaml programs for efficiency?
Like, don't use functional updates for records to reduce garbage?

Yours, Florian.
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