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A comment on Ruby is too slow for programming competitions. Parent comment

Re:Ruby is too slow for programming competitions by ClifReeder on Sunday April 21, 2013 @02:22PM (#5585756)
This is a good point that I didn't consider. Running the 'just iterate over the range version' of this code with jruby:

    [master] clifff@fair_and_square: ruby -v
    jruby 1.7.3 (1.9.3p385) 2013-02-21 dac429b on Java HotSpot(TM) 64-Bit Server VM 1.6.0_43-b01-447-11M4203 [darwin-x86_64]
    [master] clifff@fair_and_square: time ruby fair_and_square.rb C-large-1.in.bak

    real	6m39.105s
    user	6m37.762s
    sys	0m19.009s
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Re:Ruby is too slow for programming competitions by digger250 on Monday April 22, 2013 @09:03AM (#5589064)
When I run the benchmark in C-ruby (2.0.0) I get:

  real	2m35.450s
  user	2m35.257s
  sys	0m0.139s
On jruby with invokedynamic:

  time ruby -Xcompile.invokedynamic=true file2.rb C-large-1.in

  real	1m17.711s
  user	1m15.618s
  sys	0m0.830s
In jruby without invokedynamic time ruby file2.rb C-large-1.in

  real	1m37.856s
  user	1m39.260s
  sys	0m0.854s
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Re:Ruby is too slow for programming competitions by aghoreyshi on Sunday April 21, 2013 @02:27PM (#5585784)
What is sys time? The amount of time it's actually run on the processor?
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Re:Ruby is too slow for programming competitions by eatitraw on Sunday April 21, 2013 @02:34PM (#5585811)
No, it is the amount of time your program spent in system calls: http://stackoverflow.com/questions/556405/what-do-real-user-...
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Re:Ruby is too slow for programming competitions by jmah on Sunday April 21, 2013 @02:42PM (#5585845)
The amount of time spent in system calls (i.e. the kernel).
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