profr 0.1 ----------------------------
 
profr provides an alternative data structure and display for profiling data.  It still uses Rprof() to collect the data, but outputs a data.frame which should be easier to manipulate.  It also implements a novel visualisation which allows you to see the length of each call, as well as the context in which it was called.
 
To get started, try:
 
install.packages("profr")
library(profr)
p <- profr(my.slow.function())
plot(p)
 
Two built in examples are:
 
plot(nesting_prof)
plot(reshape_prof)
 
(and the second has helped me to considerably speed up (5-20x) the development version of reshape)
 
Regards,
 
Hadley
 
-- 
http://had.co.nz/