file functions and clearstatcache

Im just double checking on the use of clearstatcache. I have a function that checks whether a file exists and loads it like so function foo($bar) { if (file_exists($bar)) {

        include($bar);

} } According to clearstat cache, its use is for files that change often. In my case the files are static, so I wanted to be clear, as to whether I should/shouldn't be using clearstatcache() in my sudo function?? Thanks