Hello, John!
21.09.2015, 22:23, "John Benediktsson" <[email protected]>:
> I don't know what version of Factor you are using, but I made a couple
> improvements improvements to sha checksums over the last year or two.
Right! I keep forgetting that I'm on 0.96, which is wildly out of date,
apparently.
> I can hash a 17 mb file in 4.5 seconds on my laptop:
That sounds quite a bit more reasonable.
> There is still a lot of optimization potential because it doesn't inline
> fixnum arithmetic completely on 64-bit. I was working on it awhile ago and
> didn't quite finish.
I'm on 32 bit for now, so it shouldn't affect me.
> If you really need performance now, here's another way that calls out to
> ``shasum`` and is fast.
>
> : shasum ( path -- checksum )
> absolute-path { "shasum" "-a" "256" } swap suffix
> utf8 [ readln ] with-process-reader " " split1 drop ;
>
> IN: scratchpad [ "~/testfile" shasum ] time
> Running time: 0.206797194 seconds
>
> Hope that helps.
Actually, that helps immensely! Thank you very much!
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Александр
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