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Answer Posted / parul gupta
Not all software systems have specifications on performance
explicitly. But every system will have implicit performance
requirements. The software should not take infinite time or
infinite resource to execute. "Performance bugs" sometimes
are used to refer to those design problems in software that
cause the system performance to degrade.
Performance has always been a great concern and a driving
force of computer evolution. Performance evaluation of a
software system usually includes: resource usage,
throughput, stimulus-response time and queue lengths
detailing the average or maximum number of tasks waiting to
be serviced by selected resources. Typical resources that
need to be considered include network bandwidth
requirements, CPU cycles, disk space, disk access
operations, and memory usage The goal of performance
testing can be performance bottleneck identification,
performance comparison and evaluation, etc. The typical
method of doing performance testing is using a benchmark --
a program, workload or trace designed to be representative
of the typical system usage.
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