The great Ruby Showdown

How do the different Rubies out there perform with a non trivial ruby application?

1. The great Ruby Showdown How do the different Rubies out there perform with a non trivial ruby application? Chris Parsons - @chrismdp Wednesday, 22 February 12
2. Battleship http://github.com/ threedaymonk/ battleship Wednesday, 22 February 12
3. Only one round No display GuntherPlayer with fixed random seed Running on 2009 MBP http://github.com/ chrismdp/battleship My changes Wednesday, 22 February 12
4. Fixed random seed doesn’t work! Different Rubies do random differently Need to perform 50 ‘ticks’ instead Also different startup times was a headache Lessons Wednesday, 22 February 12
5. The players mri 1.8.7 mri 1.9.2 mri 1.9.3 jruby maglev rubinius macruby Wednesday, 22 February 12
6. Ruby 1.8.7 • No show - code doesn’t work • You shouldn’t be using it anyway • Ruby 1.9.2 has out and stable since summer 2010 Wednesday, 22 February 12
7. MacRuby 0.10 • Ruby based on the Objective-C Runtime • Long startup time • 442.65s (!!) • 431.90s (!!) Wednesday, 22 February 12
8. Rubinius (head) • Used: RBXOPT=-X19 rbx -v (can default to 1.9 too) • Long startup time • 56.41s • 52.35s • 90.16s (!) • 94.67s (!!) • 63.07s - very variable! Wednesday, 22 February 12
9. Maglev (head) • Based on vm-ware’s GemStone virtual machine • Can “transparently manage very large datasets” • 44.91s • 44.99s • 53.02s • 45.53s Wednesday, 22 February 12
10. Ruby 1.9.2 • The ‘standard’ during the tournament • Was focused on a ‘complete’ version of ruby 1.9 • 28.50s • 28.74s • 28.51s • 28.97s Wednesday, 22 February 12
11. Jruby (1.9) • A number of changes needed to the app Not an ‘out the box’ change, but still worked after tweaks. • Used: JRUBY_OPTS='--1.9 --server -J-Xmx1024m' • Long startup time: ~ 20-30 seconds • 25.93s • 25.05s • 27.60s • 26.26s Wednesday, 22 February 12
12. Ruby 1.9.3 • Better GC - doesn’t stop the world for as long • Focused on a better implementation rather than compliance • 23.64s • 23.80s • 26.30s • 24.67s Wednesday, 22 February 12
13. The Obligatory Graph mri 1.9.3 JRuby 1.9 mri 1.9.2 Maglev Rubinius mri 1.8.7 0 20 40 60 80 (lower is better) Wednesday, 22 February 12
14. The Obligatory Graph mri 1.9.3 JRuby 1.9 mri 1.9.2 Maglev Rubinius MacRuby 10 mri 1.8.7 0 125 250 375 500 (lower is better) Wednesday, 22 February 12
15. Conclusions Wednesday, 22 February 12
16. Use 1.9.3 Wednesday, 22 February 12
17. JRuby 1.9 Slow to start, but just as good Wednesday, 22 February 12
18. MRI 1.9.2 Ultra-stable Wednesday, 22 February 12
19. MacRuby Rubinius Need work Wednesday, 22 February 12
20. Maglev The new kid Looks promising Wednesday, 22 February 12
21. ~ The End ~ Chris Parsons @chrismdp Wednesday, 22 February 12