I suspect it's going to be strongly I/O bound, with the sha calculation not adding much time, but you could use a thread pool and hand off the read data blocks to a thread for the SHA calculation/file update steps...

It might be worth profiling it first (or just adding some printf's with timestamps) to see if anything but the reads (or possibly the sha calculation, if that's what takes all the time) takes significant time, though.

Given how large your reads are, you're not going to want more than a few blocks in progress at a time, though, or you'll be soaking up too much RAM.


Mike

In reply to Re: SHA-256? What do you all think of this? by RMGir
in thread SHA-256? What do you all think of this? by locked_user erichansen1836

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.