sentence: tools for benchmarking load testing ( stress/performance testing ) a web server can be performed using automation/analysis tools such as : apachebench ( or ab ) , a command line program bundled with apache http server apache jmeter , an open-source java load testing tool curl-loader , a software performance testing open-source tool httperf , a command line program originally developed at hp labs opensta , a gui-based utility for microsoft windows - based operating systems web application benchmarks web application benchmarks measure the performance of application server and database servers used to host web application .