JRuby 10x slower than Ruby on "Wide Finder" script
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Key: JRUBY-1661
URL: http://jira.codehaus.org/browse/JRUBY-1661
Project: JRuby
Issue Type: Bug
Affects Versions: JRuby 1.1
Environment: Darwin xxxxxxx.local 9.1.0 Darwin Kernel Version 9.1.0:
Wed Oct 31 17:48:21 PDT 2007; root:xnu-1228.0.2~1/RELEASE_PPC Power Macintosh
Reporter: Dave Halliday
Assignee: Thomas E Enebo
I'm filing this bug in response to Charlie's "Benchmarking JRuby" post on the
mailing list.
The script from Tim Bray's "Wide Finder" project runs about 10x slower with
JRuby than Ruby on my iMac G5 (even if you discount the Java startup time).
counts = {}
counts.default = 0
ARGF.each_line do |line|
if line =~ %r{GET /ongoing/When/\d\d\dx/(\d\d\d\d/\d\d/\d\d/[^ .]+) }
counts[$1] += 1
end
end
keys_by_count = counts.keys.sort { |a, b| counts[b] <=> counts[a] }
keys_by_count[0 .. 9].each do |key|
puts "#{counts[key]}: #{key}"
end
Sample data is available here:
http://www.tbray.org/tmp/o10k.ap
I replicated the data 100 times to get a file with one million records. It
took about 4 seconds for Ruby to crank through it and about 40 seconds for
JRuby. I ran the test on r5150 of the trunk, so the joni code is included.
Still some work to be done on each_line I guess?
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