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- lib/ramaze/helper/bench.rb

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- #bench

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# Ramaze::Helper::Bench

The Benchmark helper is a simple helper that can be used to benchmark certain blocks of code by wrapping them in a block. This can be useful if you want to see how long a certain query takes or how long it takes to create a new user.

### Public Instance Methods

bench(iterations = 1) click to toggle source

Will first run an empty loop to determine the overhead it imposes, then goes on to yield your block `iterations` times.

The last yielded return value will be returned upon completion of the benchmark and the result of the benchmark itself will be sent to Log.info

Example:

    class MainController < Ramaze::Controller
      def index
        @users = bench{ User.all }
        @tags = bench{ Article.tags }
      end
    end

This will show something like following in your log:

    [..] INFO   Bench ./start.rb:3:in `index': 0.121163845062256
    [..] INFO   Bench ./start.rb:4:in `index': 2.234987235098341

So now we know that the Article.tags call takes the most time and should be improved.

@param [Fixnum] iterations The amount of iterations to run. @return [Mixed]

    # File lib/ramaze/helper/bench.rb, line 40
    def bench(iterations = 1)
      result = nil
      from   = caller[0]
      delta  = Benchmark.realtime{ iterations.times{ nil }}
      taken  = Benchmark.realtime{ iterations.times{ result = yield }}

      Log.info "Bench #{from}: #{taken - delta}"
      return result
    end

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