banister

module FakeOverloader
  def method_added(name)
    return if @__flag
    @__overloads__ ||= {}
    @__overloads__[name] ||= {}
    m = instance_method(name)
    @__overloads__[name][m.arity] = m
    @__flag = true
    define_method(name) { |*args, &block| self.class.__overloads__[name][args.size].bind(self).call(*args, &block) }
    @__flag = false

dschneider

ActionDispatch::Request.any_instance.stub(:remote_ip).and_return("192.168.0.1")

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD