It finds hidden bugs and bottlenecks and gives developers the chance to correct them before the site goes into production. All hardware, software, and database vendors boast of the speed of their products, but load testing discloses how fast those products work within a unique environment, for primary transactions, during peak business hours. Furthermore, load testing checks and maintains applications as their workloads increase, so systems can be adjusted accordingly. As businesses grow and change, it is important to confirm a Web site's ability to sustain growth. Developers can reuse scripts to alter usage levels, transaction mixes and rates, and application complexity.
Load testing is the only way to verify the scalability of components working together.
Hardware versus Software Load testing can be implemented in either hardware or software. These scripts are then executed from a single driver machine, which behaves as if it were an infinite number of PCs and load tests the server. This method is cost effective, especially for large numbers of users. This ideal test configuration allows simultaneous measurement of both client and server, as well as easy detection of network bottlenecks. It's possible to take load testing one step further and create hypothetical scenarios of application usage.