title: C/C++ compiler feedback optimization
body: <p>Has anyone seen any real world numbers for different programs which are using the feedback optimization that C/C++ compilers offer to support the branch prediction, cache preloading functions etc.  </p>
  
  <p>I searched for it and amazingly not even the popular interpreter development groups seem to have checked the effect. And increasing ruby,python,php etc. performance by 10% or so should be considered usefull.</p>
  
  <p>Is there really no benefit or is the whole developer community just to lazy to use it?</p>