Benchmarking String/Regexp/StringScanner multicore performance on Rubinius 2.0.0pre

gistfile1.txt

rbx -v
rubinius 2.0.0dev (1.8.7 03ecc4ad yyyy-mm-dd JI) [x86_64-apple-darwin10.7.4]


String#gsub

time rbx -e 's = "." * 16_000_000; n = 1; c = s.size / n; (0...n).map { |i| Thread.new { s[c * i, c].gsub(/./, "-") }}.map(&:join)'
real	0m32.890s
user	0m32.896s
sys	0m0.098s

time rbx -e 's = "." * 16_000_000; n = 2; c = s.size / n; (0...n).map { |i| Thread.new { s[c * i, c].gsub(/./, "-") }}.map(&:join)'
real	0m45.382s
user	0m51.918s
sys	0m30.008s

time rbx -e 's = "." * 16_000_000; n = 4; c = s.size / n; (0...n).map { |i| Thread.new { s[c * i, c].gsub(/./, "-") }}.map(&:join)'
real	1m15.782s
user	1m24.672s
sys	0m52.085s


String#tr

time rbx -e 's = "." * 16_000_000; n = 1; c = s.size / n; (0...n).map { |i| Thread.new { s[c * i, c].tr(".", "-") }}.map(&:join)'
real	0m2.749s
user	0m2.738s
sys	0m0.053s

time rbx -e 's = "." * 16_000_000; n = 2; c = s.size / n; (0...n).map { |i| Thread.new { s[c * i, c].tr(".", "-") }}.map(&:join)'
real	0m1.815s
user	0m3.342s
sys	0m0.057s

time rbx -e 's = "." * 16_000_000; n = 4; c = s.size / n; (0...n).map { |i| Thread.new { s[c * i, c].tr(".", "-") }}.map(&:join)'
real	0m1.444s
user	0m4.855s
sys	0m0.062s


StringScanner#scan

time rbx -rstrscan -e 's = "." * 16_000_000; n = 1; c = s.size / n; (0...n).map { |i| Thread.new { sc = StringScanner.new(s[c * i, c]); sc.scan(/./) until sc.eos? }}.map(&:join)'
real	0m16.745s
user	0m16.750s
sys	0m0.052s

time rbx -rstrscan -e 's = "." * 16_000_000; n = 2; c = s.size / n; (0...n).map { |i| Thread.new { sc = StringScanner.new(s[c * i, c]); sc.scan(/./) until sc.eos? }}.map(&:join)'
real	0m47.403s
user	0m36.746s
sys	0m36.998s

time rbx -rstrscan -e 's = "." * 16_000_000; n = 4; c = s.size / n; (0...n).map { |i| Thread.new { sc = StringScanner.new(s[c * i, c]); sc.scan(/./) until sc.eos? }}.map(&:join)'
real	0m57.004s
user	0m35.476s
sys	0m42.150s