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Re: Re: How to process each byte in a binary file?

by John M. Dlugosz (Monsignor)
on Aug 13, 2002 at 00:46 UTC ( #189685=note: print w/ replies, xml ) Need Help??


in reply to Re: How to process each byte in a binary file?
in thread How to process each byte in a binary file?

I get similar results: split is between regex and substr. Makes me wonder, though, since split// is a "special case" that splits on every character, why it isn't simply as fast as unpack?

—John


Comment on Re: Re: How to process each byte in a binary file?
Re: Re: Re: How to process each byte in a binary file?
by kschwab (Priest) on Aug 13, 2002 at 03:05 UTC
    I added a test case for just using read(FILE,1) from a real file, and it's about the same speed as the unpack() on a string (for largish strings).

    Of course, this leaves the file open the whole time..but it's wonderfully simple :) I also have a very expensive Netapp filer helping the speed with read-ahead and a huge cache..YMMV.

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