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# 9 out of 10 microbenchmarks agree: implicit return smokes explicit return | |
require 'benchmark' | |
def with_explicit | |
return 1 | |
end | |
def with_implicit | |
1 | |
end | |
# rails returning | |
def returning(value) | |
yield | |
value | |
end | |
def with_returning | |
returning(1) do | |
end | |
end | |
n = 10_000_000 | |
Benchmark.bmbm do |x| | |
x.report("explicit") { n.times { with_explicit } } | |
x.report("implicit") { n.times { with_implicit } } | |
x.report("returning"){ n.times { with_returning } } | |
end |
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# ruby 1.8.7 (2008-08-11 patchlevel 72) [i486-linux] | |
$ ruby test.rb | |
Rehearsal --------------------------------------------- | |
explicit 8.190000 4.340000 12.530000 ( 12.705659) | |
implicit 6.550000 2.430000 8.980000 ( 8.997430) | |
returning 14.930000 4.820000 19.750000 ( 19.910411) | |
----------------------------------- total: 41.260000sec | |
user system total real | |
explicit 8.410000 4.110000 12.520000 ( 12.826650) | |
implicit 7.020000 2.320000 9.340000 ( 9.499807) | |
returning 15.410000 4.550000 19.960000 ( 20.093049) |
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