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What is performance testing and what are the bottlenecks of performance testing?

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posted Mar 8 by Sheetal Gawade

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Performance Testing is defined as a type of software testing to ensure software applications will perform well under their expected workload.

Features and Functionality supported by a software system is not the only concern. A software application's performance like its response time, reliability, resource usage and scalability do matter. The goal of Performance Testing is not to find bugs but to eliminate performance bottlenecks.

The focus of Performance Testing is checking a software program's

Speed - Determines whether the application responds quickly
Scalability - Determines maximum user load the software application can handle.
Stability - Determines if the application is stable under varying loads

Performance Testing is popularly called “Perf Testing” and is a subset of performance engineering.

Any system resource—such as hardware, software, or bandwidth—that places defining limits on data flow or processing speed creates a bottleneck. In Web applications, bottlenecks directly affect performance and scalability by limiting the amount of data throughput or restricting the number of application connections. These problems occur at all levels of the system architecture, including the network layer, the Web server, the application server, and the database server. Historically, based onour experience testing actual customer applications, bottlenecks have been distributed across these components

answer Mar 14 by Arunkumaarts