Benchmark methods with splat args in Opal

benchmark_method_splat_args.rb

require 'opal'

class Foo
  def opal_no_args_block(*args, &block)
  end

  %x{
    var TMP_3;
    def.$js_no_args_block = TMP_3 = function() {
      var self = this;
      var $iter = TMP_3.$$p;
      var block = $iter || nil;

      var args = $slice.call(arguments, 0);
      TMP_3.$$p = null;
    };
  }

  def opal_2_args(a, b, *args)
  end

  %x{
    def.$js_2_args = function(a, b) {
      var self = this;

      var args = $slice.call(arguments, 2);
    };
  }

  def opal_2_args_block(a, b, *args, &block)
  end

  %x{
    var TMP_4;
    def.$js_2_args_block = TMP_4 = function(a, b) {
      var self = this, $iter = TMP_4.$$p, block = $iter || nil;

      var args = $slice.call(arguments, 2);
      TMP_4.$$p = null;
    }
  }
end

DURATION = 10

def iteration_count message, method
  start = Time.now
  count = 0
  while Time.now - start < DURATION
    yield
    count += 1
  end

  `document.write("<p>" + message + ": " + count + "</p>")`
end

foo = Foo.new

count = 0
start = Time.now
while Time.now - start < DURATION
  foo.opal_no_args_block {}
  count += 1
end
`document.write("<p>Opal Default, no args, capture block: " + count + "</p>")`

count = 0
start = Time.now
while Time.now - start < DURATION
  foo.js_no_args_block {}
  count += 1
end
`document.write("<p>Optimized JS, no args, capture block: " + count + "</p>")`

count = 0
start = Time.now
while Time.now - start < DURATION
  foo.opal_2_args 1, 2
  count += 1
end
`document.write("<p>Opal Default, two args, no block: " + count + "</p>")`

count = 0
start = Time.now
while Time.now - start < DURATION
  foo.js_2_args 1, 2
  count += 1
end
`document.write("<p>Optimized JS, two args, no block: " + count + "</p>")`

count = 0
start = Time.now
while Time.now - start < DURATION
  foo.opal_2_args_block(1, 2) {}
  count += 1
end
`document.write("<p>Opal Default, two args, capture block: " + count + "</p>")`

count = 0
start = Time.now
while Time.now - start < DURATION
  foo.js_2_args_block(1, 2) {}
  count += 1
end
`document.write("<p>Optimized JS, two args, capture block: " + count + "</p>")`