"back in the day, the startup delay for programs using 
     large shared libraries could be quite noticeable.

The start up delay for programs caused by relocation of shared libraries is a problem big enough today that the Google Chrome team jumps through several hoops to mitigate it. They collect DLL startup addresses from the systems where Chrome is installed and calculate an optimal address for chrome.dll so that the likelihood of relocation is minimized.

Or maybe I dreamt all of this, because I couldn't find the original article where I read it.