default regexp is quite slow compared to mri
--------------------------------------------
Key: JRUBY-3696
URL: http://jira.codehaus.org/browse/JRUBY-3696
Project: JRuby
Issue Type: Improvement
Components: Performance
Affects Versions: JRuby 1.2
Environment: 2.6.26-1-amd64 debian lenny
AMD Athlon(tm) 64 X2 Dual Core Processor 5600+
4Gb RAM
ruby 1.8.7 (2008-08-11 patchlevel 72) [x86_64-linux]
jruby 1.2.0 (ruby 1.8.6 patchlevel 287) (2009-03-16 rev 9419) [amd64-java]
ava version "1.6.0_12"
Java(TM) SE Runtime Environment (build 1.6.0_12-b04)
Java HotSpot(TM) 64-Bit Server VM (build 11.2-b01, mixed mode)
Reporter: ochronus
For a very simple regexp benchmark script:
require 'benchmark'
rexp = Regexp.new('[a-z]{1,3}[0-9]{2}')
str = 'ab22'
puts Benchmark.measure {
100000.times {
str.match(rexp)
}
}
---- MRI ----
0.190000 0.020000 0.210000 ( 0.199448)
---- JRUBY (/opt/jruby-1.2.0/bin/jruby --1.9 --server regexp_benchmark.rb) ----
0.725000 0.000000 0.725000 ( 0.662000)
---- JRUBY (/opt/jruby-1.2.0/bin/jruby regexp_benchmark.rb) ----
0.788000 0.000000 0.788000 ( 0.706000)
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