Re: [Caml-list] SafeUnmarshal: questions/problems/timings
Hendrik Tews
Here is the promised followup with more details on the slow safe
unmarshalling. On
http://www.cs.ru.nl/~tews/nsUnicodeToTeXCMRt1.i.oast you can
download 281 KB of marshalled data. On my machine it takes 23
seconds to check with native code.
The data is of type
annotated translationUnit_type = annotated * annotated topForm_type list
You can test it with the following piece of code:
open Cc_ast_gen_type
open Ast_annotation
let file = "/home/tews/src/elsa/elsa/in/big/nsUnicodeToTeXCMRt1.i.oast"
;;
try
SafeUnmarshal.from_channel
[^ annotated translationUnit_type ^]
(open_in file);
print_endline "OK"
with
| _ -> print_endline "FAIL"
compile with
ocamlopt.opt safeUnmarshal.cmxa ast_annotation.ml elsa_util.ml \
ml_ctype.ml cc_ml_types.ml cc_ast_gen_type.ml justunmarshal.ml
The additional files are from Olmar, get them here:
http://www.sos.cs.ru.nl/cgi-bin/~tews/olmar/viewvc-patch.cgi/elsa/elsa/ast_annotation.ml?revision=olmar-release-2006-09-07
http://www.sos.cs.ru.nl/cgi-bin/~tews/olmar/viewvc-patch.cgi/elsa/elsa/elsa_util.ml?revision=olmar-release-2006-09-07
http://www.sos.cs.ru.nl/cgi-bin/~tews/olmar/viewvc-patch.cgi/elsa/elsa/ml_ctype.ml?revision=olmar-release-2006-09-07
http://www.sos.cs.ru.nl/cgi-bin/~tews/olmar/viewvc-patch.cgi/elsa/elsa/cc_ml_types.ml?revision=olmar-release-2006-09-07
http://www.sos.cs.ru.nl/cgi-bin/~tews/olmar/viewvc-patch.cgi/elsa/elsa/cc_ast_gen_type.ml?revision=olmar-release-2006-09-07
To produce graphs like http://www.cs.ru.nl/~tews/marshal-plot.eps
you need to download Olmar, compile it and then
- ./regrtest -ocaml in subdir elsa
- ./regtest-oast | grep time >data in subdir asttools
- gnuplot plot
where the plot file is something like
reset
set grid
unset mouse
set terminal x11 persist
#set terminal postscript enhanced color
set xlabel "size (Bytes)"
set ylabel "time (s)"
set key left
z = 2.1
plot "data" using 6:3 title "SafeUnmarshal user time", \
(0.000017088 * x) ** 2.1
Bye,
Hendrik
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