Response Time measures the performance of an individual transaction or query. Response time is the amount of time from the moment that a user sends a request until the time that the application indicates that the request has completed.
For example, let’s say you have API and you want to find how much time that API call takes to execute once requested, here you are measuring the response time.
Response time is the total time it takes from when a user makes a request until they receive a response.
When doing a load or performance test you need to find out how is your application, website, API handling all the requests and how the response time increases with the load.
Response Time Load Testing
You can use cloud testing tools to run load and performance tests, tools like LoadFocus (http://loadfocus.com) which is a – very easy to use and low-cost online service, has accurate results and is compatible with open source Apache JMeter.