https://issues.dlang.org/show_bug.cgi?id=17820
--- Comment #1 from Chad Joan <chadj...@gmail.com> --- The benchmark output seems like it might wrap poorly in bugzilla's page, so here is an edited version that should fit better: Windows 7 machine with dmd v2.076.0: -------------------------------------------------------- C:\dprojects\regex\benchmark>dmd main.d -release -O -m64 C:\dprojects\regex\benchmark>main non-regex parsing, parallel: 100000 elements in 0.061s. regex parsing, no captures, parallel: 100000 elements in 202.893 s. regex parsing, many captures, parallel: 100000 elements in 977.339 s. non-regex parsing, serial: 100000 elements in 0.031 s. regex parsing, no captures, serial: 100000 elements in 202.395 s. regex parsing, many captures, serial: 100000 elements in 837.401 s. -------------------------------------------------------- Slightly slower (hardware-wise) Linux (Gentoo) machine with dmd v2.074.1: -------------------------------------------------------- $ dmd main.d -release -O -m64 $ ./main non-regex parsing, parallel: 100000 elements in 0.062 s. regex parsing, no captures, parallel: 100000 elements in 88.055 s. regex parsing, many captures, parallel: 100000 elements in 93.546 s. non-regex parsing, serial: 100000 elements in 0.043 s. regex parsing, no captures, serial: 100000 elements in 135.063 s. regex parsing, many captures, serial: 100000 elements in 135.250 s. -------------------------------------------------------- --