Performance Testing metrics explained

To understand the load test results better, Hope they will help interpret results better:

What is “Response Time”?

Response Time measures the performance of an individual transaction or query and 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.

What is the “90% Line”?

90% Line (90 percentile of the response times)represents one of the most interesting metrics and shows that “90% of the samples finished within 0-x time” or “90% of the samples took no more than this time”

What is the “Average Response Time”?

The “Average Response Time” is a good number to know, however in a business-to-business service application, it doesn’t matter if the average response time is 500ms, if the 90% line is 1.5 seconds. From a software developer perspective, if the 50% and 90% lines are far appart, the application fluctuates a lot.

What is “Latency”?

Latency , a synonym for delay, is the time for a specific block of data to get from one point to another. Latency is measured by sending a packet that is returned to the sender and the round-trip time is considered the latency.
Latency + Processing Time = Response Time

What is “Throughput”?

Throughput indicates the number of transactions per second an application can handle, the amount of transactions produced over time during a test.

Transactions per second

Transactions per second refer to the number of database transactions completed in one second.