Well, as mentioned in the provided link's answer the reasons can vary. It can be your local Windows box, it can be your SSD - because having a SSD does not automatically mean you will benefit from it's theoretical I/O speed.
I would suggest to have a closer look at the machine specs and if the minimum specs are met http://docs.splunk.com/Documentation/Splunk/6.4.2/Installation/Systemrequirements#Recommended_hardware and use Perfmon data to monitor what happens if you start a search on your box.
... View more