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# PerformanceTestConfig

An object that enumerates the test configuration parameters.

```
object PerformanceTestConfig
```

## Overview

The [`Initiate Performance Test`](/documentation/RetentionMessaging/Initiate-Performance-Test) endpoint returns the `PerformanceTestConfig` object in the [`PerformanceTestResponse`](/documentation/RetentionMessaging/PerformanceTestResponse) response.

When you call the [`Initiate Performance Test`](/documentation/RetentionMessaging/Initiate-Performance-Test) endpoint to start a performance test, the test sends multiple requests and runs for a period of time. To calculate the time when the test concludes, add the `totalDuration` to the time, in milliseconds, you initiated the test.

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