Gists for Flog and to_proc_normal blog post: http://www.cloudspace.com/blog/2010/02/12/flog-and-to_proc_normal/

BenchmarkingFruitNames

Rehearsal ------------------------------------
 Benchmarking fruit_names_1:
  4.040000   1.750000   5.790000 (  5.852924)
 Benchmarking fruit_names_2:
  3.990000   2.060000   6.050000 (  6.092260)
-------------------------- total: 11.840000sec

       user     system      total        real
 Benchmarking fruit_names_1:
  4.030000   1.750000   5.780000 (  5.806661)
 Benchmarking fruit_names_2:
  3.980000   2.070000   6.050000 (  6.114498)

BenchmarkingFruitNamesUpdated

Rehearsal ------------------------------------
 Benchmarking fruit_names_1:
  0.320000   0.000000   0.320000 (  0.327978)
 Benchmarking fruit_names_2:
  0.190000   0.010000   0.200000 (  0.191589)
--------------------------- total: 0.520000sec

       user     system      total        real
 Benchmarking fruit_names_1:
  0.320000   0.000000   0.320000 (  0.325131)
 Benchmarking fruit_names_2:
  0.190000   0.000000   0.190000 (  0.192975)

FlogOutput

11.8: Test#fruit_names_1               test.rb:10
 7.5:   to_proc_normal
 1.5:   block_pass
 1.5:   fruits
 1.3:   map

 4.6: Test#fruit_names_2               test.rb:14
 1.5:   fruits
 1.4:   assignment
 1.4:   name
 1.3:   branch
 1.3:   map

TestClassMethods.rb

def fruit_names_1
  fruits.map(&:name)
end 

def fruit_names_2
  fruits.map do |fruit|
    fruit.name
  end 
end