We time every search and you can see the time taken in the footer of the page. If ever you see this number above 2 seconds please contact me: firstname.lastname@example.org. "Tim the Timer" one of our dutiful robots also helps us monitor speed.
Trexy has different storage and retrieval requirements to a traditional inverted index based system (e.g., Google, Yahoo etc). But we do share the same speed requirements - as fast as possible, please!
Recently I've been working on making sure we stay sub-second - this means optimisation, optimisation, optimisation! But the fateful words of the legendary computer scientist CAR Hoare have been ringing in my ears:
"Premature optimisation is the root of all evil."
"A slow search engine is even more evil."