Examples using... io.CopyBuffer()
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CopyBuffer is identical to Copy except that it stages through the
provided buffer (if one is required) rather than allocating a
temporary one. If buf is nil, one is allocated; otherwise if it has
zero length, CopyBuffer panics.
In performance critical applications, Reset can be used to discard the
current compressor or decompressor state and reinitialize them quickly
by taking advantage of previously allocated memory.