Answer: Performance testing
Explanation: Performance testing is the level of the software development life cycle which works for the evaluation of the system function and operations. The aim of the performance testing is to test the system under the extreme condition and find the critical problems related with it.
The performance of the throughput, functioning time, utilization of the central processing unit(CPU) etc are measured.This testing has the scale for measurement on the basis on scalability of the functions, speed of the system and the stability .