I am relatively new to LR. I developed few scripts for a WEB application (http). Now they are planning to make the application as secured version (https). Will there be any difference in performance test results if I run the same scripts with https version when compared to http version.
I am assuming that I do not need to make any code changes in my script if I want to move from http to https version. ( other than URL's in web_url functions ).
Please advise me in this regard. Thanks in advance.
Other than the web_url changes you indicated, no changes should be needed as long as you have disabled the popups when transitioning between http and https pages.
Jake is right, clearly, because https implies encryption that is not part of processing involved on a http page.
The difference can be surprisingly significant. You might want to script some very, very simple actions and compare the results when making the switch. That will give you an idea of the change you can expect generally.
The SSL handshake takes most of the time. After that a smaller amoun tof time is added with SSL. What you need to consider with SSL is how the browser behaves. SSL content is not cached in most browsers so there is a greater load on the server due to all requests getting static content.
In analysis you can see the portion of a request that is the SSL handshake and ssl overhead, but you have to determine the cache/no cache impact differences.