Why is search so slow in Windows?

Geniune question: Why is search so slow in Windows?

The Test

  1. Old School: Run the following from a command prompt:

dir msdeploy.exe /a/s

  1. Normal: Use Windows 8.1 explorer to search for msdeploy.exe

The results

  1. The old school method found the file I was after in less than 2
    seconds
    .
  2. Windows Explorer is still searching for the file 5 mins later.

Why?

If anyone knows, I would be very interested.

Side Note:

Outlook 2013 search is pathetic too. I usually load the Office 365
online portal and asearch from there,.