Le 15/11/12 14:52, Hadley Wickham a écrit :
R
utilisateur système écoulé
0.338 0.024 0.362
R (second time)
utilisateur système écoulé
0.262 0.000 0.262
match_ manual Rcpp
utilisateur système écoulé
0.144 0.000 0.144
match__ internal Rcpp
utilisateur système écoulé
0.134 0.000 0.133
Nice!
Worth noting that the R version gets better the second time. I guess R keeps
its hash table somewhere.
Hmmm - see http://cran.r-project.org/web/packages/fastmatch/index.html
Ouch. Simon wins:
expr min lq median uq max
1 fmatch(xx, letters) 59.4727 60.29989 74.18049 77.94288 112.2938
2 match__(xx, letters) 137.3878 137.77486 138.33766 152.14018 193.3748
3 match_(xx, letters) 147.7115 148.36442 149.20221 162.82343 171.3181
4 match(xx, letters) 288.4345 293.10380 294.58833 296.26125 333.1210
Hadley
PS. Would you be interested in a set of R functions that from a quick
skim of the R sources that I think could be much much faster if
implemented in Rcpp?
Sure. Time I have available will decide what I do of the list ^^.
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