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Depending on whether you actually need to unpack each record or not, you can maybe hardcode the offsets to reject rows before actually unpacking them. index can quickly look at a position in a string without needing pack or unpack.

Depending on how you unpack things, it might be quicker to build one large unpack template instead of unpacking items in a loop.


In reply to Re: Optimizing binary file parser (pack/unpack) by Corion
in thread Optimizing binary file parser (pack/unpack) by pwagyi

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