What's the Fastest Way to Read a Text File Line by Line in C# .NET?

c# .NET The best way to read the text files one by one

In exploring the most efficient method of reading text files in the .NET C#framework, there are many options to consider. Although your current implementation of StreamReader has shown hope, let us study several methods more deeply to determine the solution that is most suitable for your specific needs.

Use streamReader.readline

Your initial method uses streamReader.readline, but setting the buffer size to 128 may not be the most effective choice. Increasing buffer size usually improves performance. The default size is 1,024, and other feasible options are 512 or 4,096. Run the benchmark test can help you determine the best buffer size suitable for your scene.

Use File.readlines

Similar to using StreamReader.Readline, File.Readlines also uses StreamReader internally, and the buffer size is fixed to 1,024. File.readlines is usually slightly better than you use the size of the 128 buffer size. It uses iterators blocks to avoid allocating memory for all rows. Use File.readalllines

Although it is similar to File.readLines, the difference between File.Readalllnes is that it will increase the string list to create a row array, resulting in higher memory consumption. However, it provides a random visit to return string [] instead of Ienumeration

. Use string.split

String.split's performance is significantly slow, especially on large files. In addition, it allocates a array for all rows to increase memory demand.

The benchmark test to improve the efficiency

In order to accurately determine the fastest method, the benchmark test is important. By evaluating the performance of these technologies in your specific file size, system, and use mode, you can make a wise decision.

Conclusion

File.readlines is a simple and efficient choice for reading text files. If your needs need unique sharing options, you can choose StreamReader.Readline, but optimizing the size of the buffer is critical. The benchmark test is still the ultimate tool for customizing the most effective way for your specific needs.

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