Fiddler - Simulate Modem Speeds

There is an easy trick in Fiddler to simulate modem speeds. You can go to Rules->Performance->Simulate Modem Speeds to enable it.

It can also be customized by going to Rules->Customize Rules

This will open CustomRules.js where you will find

if (m_SimulateModem) {

            // Delay sends by 300ms per KB uploaded.

            oSession["request-trickle-delay"] = "300";

            // Delay receives by 150ms per KB downloaded.

            oSession["response-trickle-delay"] = "150";

        }

The values for request-trickle-delay and response-trickle-delay can be modified as per your need.

Now make a request in browser to experience the delay