block speed tests.rb

require 'benchmark'

def yields
 yield
end

def named_block &block
 block.call
end

class A
 
 def go
 end
 
 def get_proc
   @proc ||= proc {}
 end
end

3.times {
Benchmark.bm do |x|
 n = 100000
 x.report("straight yield ") { n.times { yields {}}}
 x.report("named block    ") { n.times { named_block {}}}
 a = A.new
 x.report("cached proc     ") { n.times { named_block(&a.get_proc) }}
end

}

gistfile2.txt

jruby --server

straight yield   0.047000   0.000000   0.047000 (  0.047000) * slower
named block      0.094000   0.000000   0.094000 (  0.094000)
cached proc       0.093000   0.000000   0.093000 (  0.093000) * slower

jruby --server --fast

straight yield   0.031000   0.000000   0.031000 (  0.031000)
named block      0.094000   0.000000   0.094000 (  0.094000)
cached proc       0.078000   0.000000   0.078000 (  0.078000)


1.9.1
straight yield   0.031000   0.000000   0.031000 (  0.031250)
named block      0.672000   0.015000   0.687000 (  0.687500)
cached proc       0.078000   0.000000   0.078000 (  0.078125)