Benchmarking yield, call, instance_eval

invoking_blocks.rb

require 'benchmark'

def yielder
  yield
end

def caller(&block)
  block.call
end

def instance_evaluator(&block)
  instance_eval(&block)
end

TIMES = 1000000
Benchmark.bm do |bm|
  bm.report("yield")          { TIMES.times { yielder {} } }
  bm.report("call")           { TIMES.times { caller {} } }
  bm.report("instance_eval")  { TIMES.times { instance_evaluator {} } }
end

#                    user     system      total       real
# yield          0.080000   0.000000   0.080000 (0.082796)
# call           0.560000   0.000000   0.560000 (0.561398)
# instance_eval  0.660000   0.010000   0.670000 (0.670522)