Difference among performance, load, stress and volume tests

Many people often confuse performance testing with load, stress or volume testing. Here is the simple difference as far as i know. For this, lets take the example of a shopping cart application.

In case of performance testing, application should be tested under normal load say, testing the response time taken to list the items when an item is searched.

In case of load testing, application should be tested with high load like triggering the same search operation by multiple number of users until it slows down. Volume testing is also similar to load testing.

In case of stress testing, application should be tested with high load till the application crashes. Few other cases include testing the application when system is out of resources.