For a large site with many logged in users, we get this feedback:
We were in need of consulting for our website performance, as it was slow and could not handle the large number of logged in users.
We were very fortunate that we found 2bits.com.
After investigating, Khalid provided an in depth statement of our problems, the reasons behind them, and solutions to those problems.
Now, our website is 3 X higher performance than before!
We are very satisfied with the results, and would recommend 2bits.com for others.