2.11Stress and Simulation Testing (Performance Testing)

Created on Aug 17, 2026~7 min read

When developing application systems that are intended for the internet or that need to withstand concurrent access from many users, performance stress testing and automated API simulation testing become critical steps before deployment. Through the report metrics obtained from these two types of testing, we can optimize the code before the system goes live and ensure that it meets the minimum go-live requirements.

Using the official website of the Furion framework as an example, perform stress testing:

cs
var stressTestHarnessResult = await httpRemoteService.StressTestHarnessAsync("https://furion.net/");Console.WriteLine(stressTestHarnessResult.ToString());  // Print the stress test results

Test result overview:

bash
Stress Test Harness Result:        Total Requests:          100            // Total number of requests        Total Time (s):          7.95           // Total time (seconds)        Successful Requests:     100            // Number of successful requests        Failed Requests:         0              // Number of failed requests        QPS:                     12.58          // Queries per second (QPS)        Min RT (ms):             676.38         // Minimum response time (ms)        Max RT (ms):             7,419.72       // Maximum response time (ms)        Avg RT (ms):             3,314.94       // Average response time (ms)        P10 RT (ms):             1,288.82       // P10 response time (ms)        P25 RT (ms):             2,057.10       // P25 response time (ms)        P50 RT (ms):             3,064.56       // P50 response time (ms)        P75 RT (ms):             4,100.03       // P75 response time (ms)        P90 RT (ms):             5,026.08       // P90 response time (ms)        P95 RT (ms):             7,330.71       // P95 response time (ms)        P99 RT (ms):             7,416.20       // P99 response time (ms)        P99.99 RT (ms):          7,419.72       // P99.99 response time (ms)

The stressTestHarnessResult variable is of type StressTestHarnessResult, which contains the following properties and methods:

  • Properties:

    • TotalRequests: Total number of requests (long type).
    • TotalTimeInSeconds: Total time in seconds (double type).
    • SuccessfulRequests: Number of successful requests (long type).
    • FailedRequests: Number of failed requests (long type).
    • QueriesPerSecond: Queries per second (QPS) (double type).
    • MinResponseTime: Minimum response time (ms) (double type).
    • MaxResponseTime: Maximum response time (ms) (double type).
    • AverageResponseTime: Average response time (ms) (double type).
    • Percentile10ResponseTime: P10 response time (ms) (double type).
    • Percentile25ResponseTime: P25 response time (ms) (double type).
    • Percentile50ResponseTime: P50 response time (ms) (double type).
    • Percentile75ResponseTime: P75 response time (ms) (double type).
    • Percentile90ResponseTime: P90 response time (ms) (double type).
    • Percentile95ResponseTime: P95 response time (ms) (double type).
    • Percentile99ResponseTime: P99 response time (ms) (double type).
    • Percentile9999ResponseTime: P99.99 response time (ms) (double type).

  • Methods:

    • ToString(): Outputs a detailed report string with indentation.

By default, the stress test executes 1 round, each containing 100 concurrent requests, with a maximum degree of concurrency of 100. To obtain more accurate test results, you can adjust these parameters as needed:

cs
var stressTestHarnessResult = await httpRemoteService.SendAsync(HttpRequestBuilder.StressTestHarness("https://furion.net/")    .SetNumberOfRequests(1000)  // Set the number of concurrent requests    .SetNumberOfRounds(5)   // Set the number of stress test rounds    .SetMaxDegreeOfParallelism(500));   // Set the maximum degree of parallelism// In most cases, you only need to set the number of concurrent requestsvar stressTestHarnessResult = await httpRemoteService.StressTestHarnessAsync("https://furion.net/", 500);var stressTestHarnessResult = await httpRemoteService.SendAsync(HttpRequestBuilder.StressTestHarness("https://furion.net/", 500));