Binary Data

Python memoryview: Zero-Copy Access to Binary Buffers

Binary-processing code often needs only a small region of a larger byte buffer. A normal bytes or bytearray slice is convenient, but it creates a new object containing copied data. When buffers are large or slicing happens repeatedly on a hot path, those copies can become unnecessary allocation and memory traffic. Python’s memoryview provides a different model. It exposes data from an object that supports the buffer protocol and lets Python code work with that data without first copying it into a new bytes object.