Password Field on Website Lagging After Large Query?

[ImSoArmy]

Working on a web app which makes heavy use of querying a database. Results take about 2-3 seconds to return, and display on the page. However, after all the results are shown on the page, if I attempt to log in to an account using a generic form, the backspace on my password field becomes increasingly laggy, to the point where I have to close the website entirely if I make a mistake. All other text fields work fine and snappy, and frankly I'm not sure how to resolve this problem. Presumeably there are a lot of query results preceeding the form itself, which is causing it to slow down? But the website does not query anything while a user attempts to log in.Not even sure how to describe this probelm. There are no errors, and the code has really been optimized. I am using Chrome, and interestingly, I can NOT reproduce this problem on Firefox, but the same problem exists on Safari.[Detail] The lag on the password field is ALMOST manageable with the exception of when someone attempts to delete the first character they type. The webapp lags and crashes without exception.[Update] Yes, I'm using Javascript in the user interface to query the data, also some jQuery.