Performance testing can verify that a system meets the specifications claimed by its manufacturer or vendor.

The process can compare two or more devices or programs in terms of parameters such as speed, data transfer rate, bandwidth, throughput, efficiency or reliability.

Performance testing can also be used as a diagnostic aid in locating communications bottlenecks. Often a system will work much better if a problem is resolved at a single point or in a single component. For example, even the fastest computer will function poorly on today’s Web if the connection occurs at only 40 to 50 Kbps (kilobits per second).

Slow data transfer rate may be inherent in hardware but can also result from software-related problems, such as:

Effective performance testing can quickly identify the nature or location of a software-related performance problem.