Add bufrange to support reusing buffers #25
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Hi!
I have recently used this library in the context of content-defined chunking, where I read a file into a buffer and calculate hashes of a sliding window. This produces as many hashes as there are bytes in the buffer. To get the next window, I used
Buffer.subarray(), but this is pretty slow because it creates a new buffer. So, with this PR, I would like to proposeCRC32.bufrange(buffer, start, end, [, seed]), which allows reusing the same buffer.Unfortunately, I don’t understand your codebase well enough to know where this new function should go. For starters, I have only added it to
crc32.js, but I would be happy to complete this PR with your help.Best, Martin