Beefy Boxes and Bandwidth Generously Provided by pair Networks
Perl Monk, Perl Meditation
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
With that said, compiling all of Perl 5 with a compiler that knows how to do link time optimization does offer a benefit, even if you can use LTO only on the core itself. This won't be an order of magnitude improvement. If you get 5% performance improvement, be happy.

If all you do is use LLVM's C front-end to compile the complete existing code base to IF, optimise, and then back to C to compile, I think you are probably in the ball park, if a little pessimistic. I'd have said low double digit percentage improvements.

But, if you break out the runtime components from the compile-time components -- ie. everything before the (say*) ${^GLOBALPHASE} = INIT -- and compile the before to C and link it. But then convert the (for want of a better term) "bytecode" to IF and pass it to the LLVM JIT engine, what then?

And what if the IF generated could be saved and the reloaded thus avoiding the perl compilation phase for second and subsequent runs (until edits)?

And how about combining the IF generated from the bytecode with the IF form of the core and linking it to build standalone executables?

Is any of this possible? There is only one way to find out.

(*)I appreciate that you would probably need to intercept, repeatedly, at the ${^GLOBALPHASE} = 'CHECL' or 'UNITCHECK' stages in reality.


With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

RIP Neil Armstrong


In reply to Re^7: Perl 5 Optimizing Compiler, Part 4: LLVM Backend? by BrowserUk
in thread Perl 5 Optimizing Compiler, Part 4: LLVM Backend? by Will_the_Chill

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others contemplating the Monastery: (8)
    As of 2014-11-23 12:30 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      My preferred Perl binaries come from:














      Results (131 votes), past polls