Performance testing

 Performance testing

Performance testing is a type of testing that involves testing the performance and scalability of a software application under different conditions. Performance testing ensures that the software application can handle a high volume of users or data without performance degradation. Here is an example of a performance test written in JMeter:

xml

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<?xml version="1.0" encoding="UTF-8"?>

<jmeterTestPlan version="1.2" properties="3.2" jmeter="5.1.1">

  <hashTree>

    <TestPlan guiclass="TestPlanGui" testclass="TestPlan" testname="Example Performance Test" enabled="true">

      <stringProp name="TestPlan.comments"></stringProp>

      <boolProp name="TestPlan.functional_mode">false</boolProp>

      <boolProp name="TestPlan.serialize_threadgroups">false</boolProp>

      <elementProp name="TestPlan.user_defined_variables" elementType="Arguments" guiclass="ArgumentsPanel" testclass="Arguments" testname="User Defined Variables" enabled="true">

        <collectionProp name="Arguments.arguments"/>

      </elementProp>

      <stringProp name="TestPlan.user_define_classpath"></stringProp>

    </TestPlan>

    <hashTree>

      <ThreadGroup guiclass="ThreadGroupGui" testclass="ThreadGroup" testname="Example Thread Group" enabled="true">

        <stringProp name="ThreadGroup.on_sample_error">continue</stringProp>

        <elementProp name="ThreadGroup.main_controller" elementType="LoopController" guiclass="LoopControlPanel" testclass="LoopController" testname="Loop Controller" enabled="true">

          <boolProp name="LoopController.continue_forever">false</boolProp>

          <intProp name="LoopController.loops">1</intProp>

        </elementProp>

        <stringProp name="ThreadGroup.num_threads">10</stringProp>

        <stringProp name="ThreadGroup.ramp_time">1</stringProp>

        <longProp name="ThreadGroup.start_time">1628691045000</longProp>

        <longProp name="ThreadGroup.end_time">1628691045000</longProp>

        <boolProp name="ThreadGroup.scheduler">false</boolProp>

        <stringProp name="ThreadGroup.duration"></stringProp>

        <stringProp name="ThreadGroup.delay"></stringProp>

      </ThreadGroup>

      <hashTree>

        <HTTPSamplerProxy guiclass="HttpTestSampleGui" testclass="HTTPSamplerProxy" testname="Example HTTP Request" enabled="true">

<elementProp name="HTTPsampler.Arguments" elementType="Arguments">

<collectionProp name="Arguments.arguments">

<elementProp name="" elementType="HTTPArgument">

<boolProp name="HTTPArgument.always_encode">false</boolProp>

<stringProp name="Argument.value"></stringProp>

<stringProp name="Argument.metadata">=</stringProp>

</elementProp>

</collectionProp>

</elementProp>

<stringProp name="HTTPSampler.domain">example.com</stringProp>

<stringProp name="HTTPSampler.port"></stringProp>

<stringProp name="HTTPSampler.protocol">https</stringProp>

<stringProp name="HTTPSampler.contentEncoding"></stringProp>

<stringProp name="HTTPSampler.path"></stringProp>

<stringProp name="HTTPSampler.method">GET</stringProp>

<boolProp name="HTTPSampler.follow_redirects">true</boolProp>

<boolProp name="HTTPSampler.auto_redirects">false</boolProp>

<boolProp name="HTTPSampler.use_keepalive">true</boolProp>

<boolProp name="HTTPSampler.DO_MULTIPART_POST">false</boolProp>

<stringProp name="HTTPSampler.embedded_url_re"></stringProp>

<stringProp name="HTTPSampler.connect_timeout"></stringProp>

<stringProp name="HTTPSampler.response_timeout"></stringProp>

<stringProp name="TestPlan.comments"></stringProp>

</HTTPSamplerProxy>

<hashTree>

<ResultCollector guiclass="ViewResultsFullVisualizer" testclass="ResultCollector" testname="View Results Tree" enabled="true">

<boolProp name="ResultCollector.error_logging">false</boolProp>

<objProp>

<name>saveConfig</name>

<value class="SampleSaveConfiguration">

<time>true</time>

<latency>true</latency>

<timestamp>true</timestamp>

<success>true</success>

<label>true</label>

<code>true</code>

<message>true</message>

<threadName>true</threadName>

<dataType>true</dataType>

<encoding>false</encoding>

<assertions>true</assertions>

<subresults>true</subresults>

<responseData>true</responseData>

<samplerData>true</samplerData>

<xml>true</xml>

<fieldNames>false</fieldNames>

<responseHeaders>false</responseHeaders>

<requestHeaders>false</requestHeaders>

<responseDataOnError>false</responseDataOnError>

<saveAssertionResultsFailureMessage>true</saveAssertionResultsFailureMessage>

<assertionsResultsToSave>0</assertionsResultsToSave>

<bytes>true</bytes>

<sentBytes>true</sentBytes>

<url>true</url>

<threadCounts>true</threadCounts>

</value>

</objProp>

<stringProp name="filename"></stringProp>

</ResultCollector>

<hashTree/>

</hashTree>

</hashTree>

</hashTree>

</hashTree>

</jmeterTestPlan>

In this example, we define a JMeter test plan that tests the performance and scalability of an example HTTP request. The test plan defines a thread group with 10 threads, which simulates 10 users making the same HTTP request simultaneously. The test plan also specifies a ramp-up time of 1 second, which means that the threads are started gradually over a 1-second period.

During the test, JMeter collects various performance metrics such as response time, latency, and throughput. The test results can be visualized using