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41236
2007 Apr 19
0
Feature request for 'sprintf' optimization (PR#9621)
...ystem.time(with(dat,sprintf("%04i-%03i",year,yday)))
wcast <- system.time(with(dat,sprintf("%04i-%03i",as.integer(year),
as.integer(yday))))
100*wocast/wcast # as a percent comparison
My results on a Debian VM with R-devel (r41236) have elapsed ratios of 63408%,
and on Windows XP with R 2.4.1 of 23300%. Using a similar data frame to 'dat'
except, much longer (using 1900:2100 for year; nrow=73365) result in ratios of
120775%. Certainly, the time of the 'sprintf' wrapper is dependent not only on
processor and p...