Black Magic: A Blazing Fast Circular Buffer
2025-01-11
This article presents a clever optimization of circular buffers using virtual memory paging. Traditional circular buffer read/write operations are inefficient due to boundary handling. The author uses the `mmap` system call to map the buffer to two contiguous virtual memory regions. This allows writes to proceed continuously without boundary checks, drastically improving performance. This method leverages the OS to handle wrap-around automatically, eliminating complex boundary checks and modulo operations. The result is a threefold performance increase.
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