super vs super if defined?(super)

super_defined_cost.rb

# Test to see how much time checking super defined costs (approx 10%)

require 'benchmark'

class Base
  def meth; end
end

class WithSuperCheck < Base
  def meth; super  if defined?(super); end
end

class WithoutSuperCheck < Base
  def meth; super; end
end

Benchmark.bm do |x|
  x.report { 10000000.times do; WithSuperCheck.new.meth ; end; }
  x.report { 10000000.times do; WithoutSuperCheck.new.meth ; end; }
end

#       user     system      total        real
#   2.440000   0.000000   2.440000 (  2.440145)
#   2.180000   0.000000   2.180000 (  2.181029)
#
#       user     system      total        real
#   2.420000   0.000000   2.420000 (  2.427584)
#   2.180000   0.000000   2.180000 (  2.177681)
#
#       user     system      total        real
#   2.430000   0.000000   2.430000 (  2.432584)
#   2.160000   0.000000   2.160000 (  2.168029)