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DA0008: Few samples collected

Applies to: yesVisual Studio noVisual Studio for Mac

Note

This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here

Item Value
Rule Id DA0008
Category Profiling Tools Usage
Profiling method Sampling
Message Only just a few samples were collected. Consider a longer run or faster sampling rate for more significant results.
Rule type Information

Cause

Just a few samples were collected in the profiling run.

Rule description

When the sampling method is used, you should collect a statistically significant number of samples to make sure that the data represent actual program behavior. To minimize sampling errors, you should try to collect at least 1000 samples of program instruction execution behavior. If you do not collect enough samples, you can be misled when you analyze the profiling data.

How to fix violations

Consider a profiling a longer run of the application or using a faster sampling rate to obtain statistically significant results. For information about how to change the sampling rate in the Visual Studio IDE, see How to: Choose sampling events. For more information about how to change the sampling rate when you use the Profiling Tools command line, see Timer in the VSPerfCmd reference.