For .NET developers building high-performance file generation tools, understanding the difference between IBufferWriter and Stream is crucial. This article clarifies that IBufferWriter is not simply a faster Stream but a different contract that can reduce temporary allocations when used correctly. It explains key methods like GetSpan and Advance, and discusses the BufferWriterStream adapter. The practical takeaway is that while IBufferWriter can improve performance in scenarios with many small writes, it may still involve copying in some cases. Developers should evaluate their specific write patterns to choose the optimal approach for XLSX generation.
A technical deep dive into IBufferWriter and Stream for .NET XLSX writing, focusing on memory allocation and performance trade-offs.