Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Logarithmic-scale plot of the execution times of the randomly generated queries across the 16 query combinations that were tested. The grey horizontal line represents the default amount of time (180 seconds) that the user interface allows queries to run before timing out.
