Rubinius For You - GoRuCo
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Rubinius For You Evan Phoenix Jun 4th, 2011 ★ @evanphx ♘ github.com/evanphx
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Evan Phoenix' presentation at GoRuCo
Transcript of Rubinius For You - GoRuCo
Rubinius For You
Evan Phoenix Jun 4th, 2011
★ @evanphx ♘ github.com/evanphx
The Year Rubinius Breaks Through
2011
Why Bother?
We can have it better
Why Bother?
Not a single release, a philosophy
Why Bother?
Improve over time
Why Bother?
Improve
Performance
Why Bother?
Improve
Tooling
Why Bother?
Improve
Developer Experience
Why Bother?
What’s Next?
2.0
What’s Next?
2.0
Ruby 1.9 support
What’s Next?
2.0
Concurrency
What’s Next?
2.0
Microsoft Windows support
What’s Next?
Real World
When programs stop being polite and start getting real.
Real World
Rubinius slower than it should be
Real World
Profiling is key to improving
Real World
Profiling is key to improving
Example
Real World
WARNING:SCIENCE AHEAD
A method seems slow
Problem:
Step 1
Improving
Step 1
Benchmark
Improving
require 'benchmark'cc = CoworkersCode.new
Benchmark.bm do |x| x.report("initial") { cc.calculate_awesome_score }end
user system total realinitial 0.071788 0.001601 0.073389 ( 29.998823)
user system total realinitial 0.071788 0.001601 0.073389 ( 29.998823)
29.998823
user: 0.071788system: 0.001601 total: 0.073389 real: 29.998823
Time running code
User
Time inside the kernel
System
Sum of user and system
Total
Elapsed wall clock
Real
Topic
Wall Clock
user: 0.071788system: 0.001601 total: 0.073389 real: 29.998823
0.073389
29.998823!=??
Step 2
Profile
Improving
» 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
» 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]
def superhero_factor sleep 3 rand(10) end
Step 3
Fix and benchmark
Improving
user system total realinitial 0.000102 0.000047 0.000149 ( 0.000139)
0.000139
0.073389
29.998823!=
Invisible in all but real
Sleep!
A method seems slow
Problem:
SOLVED!
Rubinius can tune your code itself
Real World
Rubinius can tune your code itself
Dynamic is not dynamic all the time
Real World
“It’s ducks all the way down.”
- Sandi Metz
Rubinius can tune your code itself
Most of yours quack the same though!
Real World
def last_part(str) str.split(“ “).lastend
def last_part(str) str.split(“ “).lastend
21%
1 class98%
1: 25245 2: 275 3: 86 4: 50 5: 35 6: 6 7: 10 8: 5 9: 5 10: 2 10+: 34
Call sites running Array specs
Rubinius can tune your code itself
Shoot first, let the VM sort it out.
Real World
Made for ruby applications
Real World
Made for ruby applications
Ruby is objects
Real World
Made for ruby applications
Rubinius is made for objects
Real World
Made for ruby applications
Lots of objects
Real World
“To optimize, I make sure not to create objects.”
- Ryan Smith
1. 10,000,000 timesa. Create 101 objectsb. Save one of them
https://gist.github.com/1008305
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mri
1. 10,000,000 timesa. Create 101 objectsb. Save one of them
Saved objects: 10,000,000
0
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1000
1500
2000
2500
3000
MBs
mri rbx
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MBs
mri rbx
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100k 200k 300k 400k
MBs
mri rbx
0
750
1,500
2,250
3,000
mri rbx
57
531
Memory Time
Made for ruby applications
Love thy objects
Real World
Next Steps
More profiling, more tuning
Next Steps
Newer, smarter compiler
Next Steps
Rubinius and You
Compatibly is there
Rubinius and You
Rubinius isn’t terrible for any workload
Rubinius and You
Rubinius is amazing for some
Rubinius and You
Try Rubinius!
Rubinius and You
Stickers in the back!
Rubinius and You
Shirts email us!
Rubinius and You
Use it in production=>
blog post about you
Rubinius Reward
Thanks!
Evan Phoenix Jun 4th, 2011
★ @evanphx ♘ github.com/evanphx
Technology
Efficient Memory Layout
Rubinius
obj.ivars = { :@name => “Evan”, :@age => 31}
obj.class.ivars = { :@name => 0, :@age => 1}
obj.ivars = [ “Evan”, 31]
Flags
Class
Extra Ivars
@name
@age
