On Wednesday, August 6, 2014 7:51:09 PM UTC-4, Russell Keith-Magee wrote:
>
> Hi Alvaro,
>
> Firstly - congratulations - sounds like an interesting package. However,
> you may find that django-users is a better forum to announce something like
> that. Django-developers is the forum for discussing the development of
> Django itself, and while most of the people on this list also use django,
> django-users is a bigger audience.
>
>
Thank you--that's a good suggestion. I'll post an announcement there after
ironing out any remaining major issues.
> Secondly - the "would I use this" question... maybe. Faster templates are
> obviously a good thing; I'd be interested to see exactly how much faster
> (and how much faster compared to a "known fast" alternative template
> language like Jinja2). I'm especially interested to see how it's handled
> custom template tags, because that has always been the sticking point for
> faster *native* Django templates.
>
>
Makes sense. I have a simple benchmark script (synth/tests/timings.py) that
*roughly
*suggests ~27x faster on Ubuntu, ~20x faster on OS X and ~11x faster on
Windows, given a somewhat esoteric set of machines, templates and
data. (The details are at the end of this message, and all the standard
benchmark caveats apply.) If there's an official benchmark suite I can run
it as well and post the timings. At the moment, overall, the difference
seems to range from 10x to 30x. (Python2 vs. Python3 doesn't appear to
affect the outcome much, nor does 32-bit vs 64-bit.)
Anyway, with the bulk of the functionality completed, I can now focus on
performance, so I expect those figures to go up, as there's a lot
of low-hanging fruit.
Separately, I've been studying the differences between Django's template
language and Jinja2 and I'm considering implementing the latter natively as
well, especially because: there'd be a lot of shared code; the Django
integration glue is already there; and it seems to allow even more
opportunities for speed gains. Any thoughts?
> Lastly - you've implemented a binding layer to a new template language. Is
> there anything in Django's core that you would like to see modified that
> would make your life easier? Using a custom template language is an area
> where many people claim it's impossible to do (despite evidence to the
> contrary), so we'd like to make it as easy as possible to do. Any
> suggestions/requests?
>
>
Thanks for the offer! Currently, the best thing I can think of is to
actually try it on real projects and report significant issues and
differences in output.
One relatively small improvement I just thought of is to allow
template loaders to parse top-level templates from a file path rather than
accepting the source as a string. (Perhaps this is possible already?)
Though by far, the trickiest parts of the binding layer are the various
gymnastics necessary to make arbitrary custom tags work (custom filters
being much simpler.) I have some ideas about how that could be improved
which I'll elaborate in a follow-up post.
Thanks again!
Alvaro
Sample Timings:
* * Ubuntu 14.04.1 SMP / Linux 3.13.0-32-generic / 6GB RAM:*
~/code/synth$ python tests/timings.py
Loaded synth; version: 1.0.3
=== Prepping ===
Directories: ('tests/templates/django/blog', 'tests/templates/django', '.')
Data: {'bar': 2, 'qux': 3, 'posts': [{'url': 'http://example.org/posts/1',
'category': 'movies', 'title': 'Rocky'}, {'url':
'http://example.org/posts/2', 'category': 'shows', 'title': 'Blackjack'}],
'user': 'Dolph Lundgren', 'subtitle': 'A blog about movies and TV shows',
'foo': 1, 'categories': [{'url': 'http://example.org/categories/movies',
'title': 'Movies'}, {'url': 'http://example.org/categories/shows', 'title':
'Shows'}]}
Files: ['base.html', 'home.html', 'index.html', 'A.tpl', 'B.tpl',
'base.tpl', 'C.tpl', 'D.tpl', 'derived.tpl', 'empty.tpl', 'layout.html',
'messages.html', 'variables.tpl', 'X.tpl']
Debug: False
=== Starting ===
Iterations: 1000
Django: 0.384s; Synth: 0.018s; +/-: 21.6x; File: 'base.html'
Django: 1.301s; Synth: 0.077s; +/-: 16.8x; File: 'home.html'
Django: 1.042s; Synth: 0.070s; +/-: 14.8x; File: 'index.html'
Django: 0.276s; Synth: 0.012s; +/-: 23.8x; File: 'A.tpl'
Django: 0.555s; Synth: 0.016s; +/-: 34.9x; File: 'B.tpl'
Django: 0.326s; Synth: 0.014s; +/-: 22.9x; File: 'base.tpl'
Django: 0.835s; Synth: 0.022s; +/-: 37.4x; File: 'C.tpl'
Django: 1.081s; Synth: 0.027s; +/-: 40.3x; File: 'D.tpl'
Django: 0.694s; Synth: 0.023s; +/-: 29.6x; File: 'derived.tpl'
Django: 0.229s; Synth: 0.008s; +/-: 29.8x; File: 'empty.tpl'
Django: 1.338s; Synth: 0.055s; +/-: 24.2x; File: 'layout.html'
Django: 0.573s; Synth: 0.021s; +/-: 27.8x; File: 'messages.html'
Django: 0.413s; Synth: 0.017s; +/-: 24.1x; File: 'variables.tpl'
Django: 0.549s; Synth: 0.016s; +/-: 34.8x; File: 'X.tpl'
Average: 27.4x
=== Finished ===
* * Mac OS X 10.9.4 Mavericks / Intel Core i7 2.7GHz / 16GB RAM:*
/Projects/code/synth$ python3 tests/timings.py
Loaded synth; version: 1.0.3
=== Prepping ===
Directories: ('tests/templates/django/blog', 'tests/templates/django', '.')
Data: {'categories': [{'title': 'Movies', 'url': '
http://example.org/categories/movies'}, {'title': 'Shows', 'url': '
http://example.org/categories/shows'}], 'posts': [{'title': 'Rocky', 'url':
'http://example.org/posts/1', 'category': 'movies'}, {'title': 'Blackjack',
'url': 'http://example.org/posts/2', 'category': 'shows'}], 'user': 'Dolph
Lundgren', 'qux': 3, 'subtitle': 'A blog about movies and TV shows', 'foo':
1, 'bar': 2}
Files: ['base.html', 'home.html', 'index.html', 'A.tpl', 'B.tpl',
'base.tpl', 'C.tpl', 'D.tpl', 'derived.tpl', 'empty.tpl', 'layout.html',
'messages.html', 'variables.tpl', 'X.tpl']
Debug: False
=== Starting ===
Iterations: 1000
Django: 0.352s; Synth: 0.030s; +/-: 11.9x; File: 'base.html'
Django: 1.733s; Synth: 0.128s; +/-: 13.5x; File: 'home.html'
Django: 1.337s; Synth: 0.117s; +/-: 11.4x; File: 'index.html'
Django: 0.284s; Synth: 0.018s; +/-: 16.0x; File: 'A.tpl'
Django: 0.683s; Synth: 0.027s; +/-: 25.7x; File: 'B.tpl'
Django: 0.353s; Synth: 0.022s; +/-: 15.8x; File: 'base.tpl'
Django: 1.066s; Synth: 0.034s; +/-: 31.3x; File: 'C.tpl'
Django: 1.451s; Synth: 0.041s; +/-: 35.2x; File: 'D.tpl'
Django: 0.852s; Synth: 0.036s; +/-: 23.9x; File: 'derived.tpl'
Django: 0.239s; Synth: 0.016s; +/-: 14.9x; File: 'empty.tpl'
Django: 2.014s; Synth: 0.084s; +/-: 24.0x; File: 'layout.html'
Django: 0.750s; Synth: 0.047s; +/-: 15.9x; File: 'messages.html'
Django: 0.417s; Synth: 0.028s; +/-: 15.0x; File: 'variables.tpl'
Django: 0.622s; Synth: 0.027s; +/-: 23.0x; File: 'X.tpl'
Average: 19.8x
=== Finished ===
* * Windows 8.1 Pro / Intel Core i7-4790 3.60Ghz / 16GB RAM:*
c:\code\synth>python.exe tests\timings.py
Loaded synth; version: 1.0.3
=== Prepping ===
Directories: ('tests/templates/django/blog', 'tests/templates/django', '.')
Data: {'user': 'Dolph Lundgren', 'subtitle': 'A blog about movies and TV
shows', 'foo': 1, 'posts': [{'url': 'http://example.org/posts/1',
'category': 'movies', 'title': 'Rocky'}, {'url': 'http://exam
ple.org/posts/2', 'category': 'shows', 'title': 'Blackjack'}],
'categories': [{'url': 'http://example.org/categories/movies', 'title':
'Movies'}, {'url': 'http://example.org/categories/shows', 'title'
: 'Shows'}], 'qux': 3, 'bar': 2}
Files: ['base.html', 'home.html', 'index.html', 'A.tpl', 'B.tpl',
'base.tpl', 'C.tpl', 'D.tpl', 'derived.tpl', 'empty.tpl', 'layout.html',
'messages.html', 'variables.tpl', 'X.tpl']
Debug: False
=== Starting ===
Iterations: 1000
Django: 0.339s; Synth: 0.049s; +/-: 7.0x; File: 'base.html'
Django: 1.438s; Synth: 0.152s; +/-: 9.4x; File: 'home.html'
Django: 1.089s; Synth: 0.126s; +/-: 8.6x; File: 'index.html'
Django: 0.274s; Synth: 0.035s; +/-: 7.8x; File: 'A.tpl'
Django: 0.680s; Synth: 0.056s; +/-: 12.1x; File: 'B.tpl'
Django: 0.326s; Synth: 0.038s; +/-: 8.7x; File: 'base.tpl'
Django: 1.049s; Synth: 0.077s; +/-: 13.6x; File: 'C.tpl'
Django: 1.431s; Synth: 0.096s; +/-: 14.9x; File: 'D.tpl'
Django: 0.797s; Synth: 0.065s; +/-: 12.2x; File: 'derived.tpl'
Django: 0.220s; Synth: 0.030s; +/-: 7.2x; File: 'empty.tpl'
Django: 1.566s; Synth: 0.092s; +/-: 17.1x; File: 'layout.html'
Django: 0.632s; Synth: 0.052s; +/-: 12.1x; File: 'messages.html'
Django: 0.391s; Synth: 0.042s; +/-: 9.3x; File: 'variables.tpl'
Django: 0.619s; Synth: 0.055s; +/-: 11.2x; File: 'X.tpl'
Average: 10.8x
=== Finished ===
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