title: performance php search file vs key - value path
body: <p>Is it faster search file in a tree of directory or search a file path in a single associate key - value file for load a class?
  example first case:</p>
  
  <pre><code>dir
     file1
     file2
     dir2
         file3
         dir3
             file4
     dircommon
         file5
  </code></pre>
  
  <p>example second case:
  single file ( test.config.txt ) with associate key - value: </p>
  
  <pre><code>file1=/dir/
  file2=/dir/
  file3=/dir/dir2/
  file4=/dir/dir2/dir3 
  </code></pre>
  
  <p>I search file4 and then load class defined into file4</p>
  
  <p>What is more faster method?</p>
  
  <p>There is a faster and perfomance method to manage depencencies of php files?</p>