Evan Phoenix' presentation at GoRuCo

1. Rubinius For You
@evanphx ♘ github.com/evanphx
Evan Phoenix Jun 4th, 2011

2. 2011
The Year Rubinius
Breaks Through

3. Why Bother?

4. Why Bother?
We can have it better

5. Why Bother?
Not a single release, a philosophy

6. Why Bother?
Improve over time

7. Why Bother?
Improve
Performance

8. Why Bother?
Improve
Tooling

9. Why Bother?
Improve
Developer Experience

10. What’s Next?

11. What’s Next?
2.0

12. What’s Next?
2.0
Ruby 1.9 support

13. What’s Next?
2.0
Concurrency

14. What’s Next?
2.0
Microsoft Windows support

15. Real World

16. Real World
When programs stop being polite
and start getting real.

17. Real World
Rubinius slower than it should be

18. Real World
Profiling is key to improving

19. Real World
Profiling is key to improving
Example

20. WARNING:
SCIENCE AHEAD

21. Problem:
A method seems slow

22. Improving
Step 1

23. Improving
Step 1
Benchmark

24. require 'benchmark'
cc = CoworkersCode.new
Benchmark.bm do |x|
x.report("initial") {
cc.calculate_awesome_score
}
end

25. user system total real
initial 0.071788 0.001601 0.073389 ( 29.998823)

26. user system total real
initial 0.071788 0.001601 0.073389 ( 29.998823)

27. 29.998823

28. user: 0.071788
system: 0.001601
total: 0.073389
real: 29.998823

29. User
Time running code

30. System
Time inside the kernel

31. Total
Sum of user and system

32. Real
Elapsed wall clock

33. Wall Clock
Topic

34. user: 0.071788
system: 0.001601
total: 0.073389
real: 29.998823

35. ??
0.073389
!=
29.998823

36. Improving
Step 2
Profile

37. » rbx -Xprofile scratch/profile_sample.rb
% cumulative self self total
time seconds seconds calls ms/call ms/call name
------------------------------------------------------------
99.69 30.00 30.00 10 3000.10 3000.10 Rubinius::Channel#receive_timeout
0.13 0.04 0.04 2 19.82 19.82 IO.open_with_mode
0.11 0.03 0.03 1 33.05 33.05 IO::Buffer#fill
0.02 0.01 0.01 18 0.30 0.30 FFI::Platform::POSIX.stat

38. » rbx -Xprofile -Xprofiler.graph scratch/profile_sample.rb
0.00 30.00 10/60 Kernel#sleep [15]
[16] 99.9 30.00 0.00 10 Rubinius::Channel#receive_timeout [16]
0.00 30.00 10/20 CoworkersCode#superhero_factor [14]
[15] 99.9 0.00 30.00 10 Kernel#sleep [15]
30.00 0.00 10/10 Rubinius::Channel#receive_timeout [16]

39. def superhero_factor
sleep 3
rand(10)
end

40. Improving
Step 3
Fix and benchmark

41. user system total real
initial 0.000102 0.000047 0.000149 ( 0.000139)

42. 0.000139

43. 0.073389
!=
29.998823

44. Sleep!
Invisible in all but real

45. E D
Problem:!
O LV
S
A method seems slow

46. Real World
Rubinius can tune your code itself

47. Real World
Rubinius can tune your code itself
Dynamic is not dynamic all the time

48. “It’s ducks all the way down.”
- Sandi Metz

49. Real World
Rubinius can tune your code itself
Most of yours quack the same though!

50. def last_part(str)
str.split(“ “).last
end

51. def last_part(str)
str.split(“ “).last
end

52. 1: 25245
2: 275
3: 86
2 4: 50
1% 5: 35
6: 6
7: 10
8: 5
9: 5
10: 2
10+: 34
1 class
98%
Call sites running
Array specs

53. Real World
Rubinius can tune your code itself
Shoot first, let the VM sort it out.

54. Real World
Made for ruby applications

55. Real World
Made for ruby applications
Ruby is objects

56. Real World
Made for ruby applications
Rubinius is made for objects

57. Real World
Made for ruby applications
Lots of objects

58. “To optimize, I make sure not to
create objects.”
- Ryan Smith

59. 1. 10,000,000 times
a. Create 101 objects
b. Save one of them
https://gist.github.com/1008305

60. mri
3000
2500
2000
MBs
1500
1000
500
0

61. 1. 10,000,000 times
a. Create 101 objects
b. Save one of them
Saved objects: 10,000,000

62. mri rbx
3000
2500
2000
MBs
1500
1000
500
0

63. mri rbx
300
250
200
MBs
150
100
50
0

64. mri rbx
70
58
47
MBs
35
23
12
0
100k 200k 300k 400k

65. Memory Time
3,000
2,250 531
1,500
750
57
0
mri rbx

66. Real World
Made for ruby applications
Love thy objects

67. Next Steps

68. Next Steps
More profiling, more tuning

69. Next Steps
Newer, smarter compiler

70. Rubinius and You

71. Rubinius and You
Compatibly is there

72. Rubinius and You
Rubinius isn’t terrible for any
workload

73. Rubinius and You
Rubinius is amazing for some

74. Rubinius and You
Try Rubinius!

75. Rubinius and You
Stickers in the back!

76. Rubinius and You
Shirts email us!
community@rubini.us

77. Rubinius Reward
Use it in production
=>
blog post about you

78. Thanks!
@evanphx ♘ github.com/evanphx
Evan Phoenix Jun 4th, 2011

79. Rubinius
Technology
Efficient Memory Layout

80. obj.ivars = {
:@name => “Evan”,
:@age => 31
}

81. obj.class.ivars = {
:@name => 0,
:@age => 1
}
obj.ivars = [
“Evan”,
31
]

82. Flags
Class
Extra Ivars
@name
@age