[Caml-list] an OCaml program profile

[Francois Berenger <berenger@riken.jp>]

Hello,

I am running experiments with a program.
I'd like the program to run faster because
it would reduce experiments round-trip.

Here is the top of the profile:
---
Flat profile:

Each sample counts as 0.01 seconds.
   %   cumulative   self              self     total
  time   seconds   seconds    calls   s/call   s/call  name
  58.07    132.13   132.13 161527987     0.00     0.00  caml_fl_allocate
  21.13    180.21    48.08     2339     0.02     0.02  caml_fl_add_blocks
   4.87    191.30    11.09     5497     0.00     0.00  mark_slice
   1.65    195.06     3.76 979591485     0.00     0.00 
caml_page_table_lookup
   1.50    198.47     3.41     5620     0.00     0.00  sweep_slice
   1.20    201.21     2.74 186584504     0.00     0.00  caml_oldify_one
   1.04    203.57     2.36 134849325     0.00     0.00  compare_val
   1.02    205.89     2.32 290049921     0.00     0.00  caml_float_compare
   0.80    207.71     1.82 123048730     0.00     0.00  caml_hash
   0.76    209.44     1.73 161525648     0.00     0.00  caml_alloc_shr
---

I think the program spends most of its time doing garbage
collection.

How can I make it go faster?

Would the OPAM switch 4.00.1+alloc-profiling (support allocation 
profiling on x86_64) would allow me to find the culprit function?

If yes, how to use it?

Thanks a lot,
Francois.