in reply to Re^3: developing a template system
in thread developing a template system

ok, the test script is right there in the package (t/test.pl, t/test.html). I updated some minutes ago it because the version that was in the package wasn't runnable.
ok, it's not a complete test of all functionalities, but you can have a look at it and maybe tell me what I'm missing.

update: i updated the test.pl script again, so now everybody should see quickly what it is doing. before it was just a big mess...

update2: here is the test script with additional testing of H::T::JIT: http://www.tinita.de/projects/perl/modules/HTC_test_pl.txt
when I run it HTC is more than 3 times faster than H::T::JIT, so I *must* be doing something wrong...

Replies are listed 'Best First'.
Re^5: developing a template system
by perrin (Chancellor) on Aug 22, 2005 at 03:02 UTC
    I finally had a chance to test this myself. On my system, H::T::C is about 2.5 times faster than H::T::JIT, which is about 6 times faster than normal H::T. That's an impressive result. I did notice though that the output is not identical. It looks like your loop context vars are off by 1, and maybe some interpolation is not quite the same.

    I wonder if any of the speed difference is a result of feature differences. As you mentioned, they are not identical in features. Regardless, I think this shows that compiling to perl opcodes is a good approach and that either Inline::C is just not fast enough or the C code generated by H::T::JIT could be optimized more.

[reply]
      It looks like your loop context vars are off by 1
      yep, noticed that, that should be an easy fix.

      About speed - I tested with a larger template by just repeating the same template code a couple of times. The larger the template, the faster was H::T::JIT.
      With my example template, they reach about the same speed here. So for big templates H::T::JIT definitely seems to be a lot faster.

      If I turn off case_sensitive, I'm only about 2.5 times faster than H::T instead of 5, but on the other hand turning on case_sensitive in H::T doesn't result in a speed gain.

[reply]
        My results are a bit different. When I turn off case-sensitivity, JIT immediately becomes 20% faster than Compiled. When I increase the size of the template, JIT slows down but Compiled is almost unaffected. At 4 times the original size, JIT slows down to the point where Compiled is twice as fast as JIT.

        FYI, my system is Fedora Core 3 with Perl 5.8.5.

[reply]

In Section Seekers of Perl Wisdom