This looked fun, so I did my own micro-benchmark on an rpi3, armv7 : $ for i in bench-native bench-pcre bench-pcrejit bench-rure; do echo -n $i; (cd $i

This looked fun, so I did my own micro-benchmark on an rpi3, armv7 : $ for i in bench-native bench-pcre bench-pcrejit bench-rure; do echo -n $i; (cd $i; time ./$i < ../input500000.txt > /dev/null) ; echo; done bench-native real 0m24,883s user 0m56,580s sys 0m0,120s bench-pcre real 0m13,125s user 0m27,200s sys 0m0,160s bench-pcrejit real 0m2,688s user 0m3,140s sys 0m0,120s bench-rure real 0m2,779s user 0m3,300s sys 0m0,090s It looks like pcre with JIT enabled is always faster than the rure version, but this is very close.