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gistfile1.txt

library(prof)

library(re2r)
library(stringi)
strs = rep(c("this is test",  "this is test, and this is not test", "they are tests"),1000000)
start_profiler("sample.log")
invisible(re2_match_all(input = strs, pattern = "(this)( is)"))
#invisible(stri_match_all(strs, regex = "(this)( is)"))
stop_profiler()
# google-pprof --text  /home/out/R/x86_64-pc-linux-gnu-library/3.2/re2r/libs/re2r.so  sample.lo
# google-pprof --web  /usr/lib/R/bin/exec/R  sample.lo
# CPUPROFILE="sample.lo" R -f te.R 
# b __strcat_sse2_unaligned
# google-pprof --web --focus=stri_match_all_regex /usr/bin/R  sample.lo
#R -d "valgrind --tool=callgrind " --vanilla  < te.R > res.log 2>&1
#google-pprof --web --focus=stri_match_all_regex /usr/local/lib/R/site-library/stringi/libs/stringi.so  sample.lo