proc-call-vs-yield.cr

require "benchmark"
puts Crystal::DESCRIPTION

def slow(&block)
  block.call
end

def slow2(&block)
  yield
end

def slow3(&block)

end

def fast
  yield
end

Benchmark.ips do |x|
  x.report("block.call") { slow { 1 + 1 } }
  x.report("block + yield") { slow2 { 1 + 1 } }
  x.report("unused block") { slow3 { 1 + 1 } }
  x.report("yield")      { fast { 1 + 1 } }

end