This article explains how Python's built-in io.BytesIO allows storage of bytes in memory, which is useful for efficiently handling data. However, using the read() method can double memory usage due to creating a copy of data. Instead, the recommended approach is to use BytesIO.getbuffer() that returns a memoryview, allowing efficient access to the data without allocating additional memory. Furthermore, while memoryview poses some limitations in available methods compared to bytes, it’s a crucial feature for performance optimization in memory management.
If your data is big enough, it’s essential to save memory when reading it out from BytesIO, as read() can double memory usage.
BytesIO.getbuffer() is a very useful method that returns a memoryview of the underlying data without allocating new memory, thus solving memory duplication.
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