Commits
-------
cd24fb8 change explode's limit parameter based on known variable content
b3cc270 minor optimalisations for explode
Discussion
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[FrameworkBundle][CssSelector][HttpFoundation][HttpKernel] [Security][Validator] Minor optimizations for "explode" function
Bug fix: no
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
Fixes the following tickets: -
Todo: -
I added limit parameter in some places, where it may be usefull. I did not check the context of what values may have been exploded. So to not break anything, I added +1 to limit parameter.
If you find out that in some places limit (or limit+1) is not important or meaningless, write a comment please and I will fix it.
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by fabpot at 2011/12/07 06:56:49 -0800
Adding +1 just to be sure to not break anything is clearly something we won't do. What is the benefit of doing that anyway?
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by pulzarraider at 2011/12/07 13:50:24 -0800
The main idea of making this PR was to notify about some places that may run faster with just adding one parameter to explode function.
If in code is someting like: ```list($a, $b) = explode(':', $s);```
Function ```explode``` will create n-items (depends on ```$s```), but we need in code only the first two items. There is no reason to let ```explode``` create more items in memory that are NEVER used in our code. The limit parameter is there for these situations, so let's use it.
I know that it is microoptimization and may look unimportant, but we are writing a framework - so people expect that code will be as fast as possible without this kind of mistakes.
As I've noticed above, I know that +1 is not ideal solution, but the fastest without debugging the code. I expect that someone (with good knowledge of that code) will look at it and write in comments if variable may contain 1 comma (dot or someting on what is doing the explode) or maybe 2 in some situations or more.
Anyway, +1 will not break anything, because same items are created as it is now, but no unnecessary item is created.
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by fabpot at 2011/12/07 23:14:59 -0800
I'm +1 for adding the number to avoid problems but I'm -1 on the optimization side of things as it won't optimize anything.
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by helmer at 2011/12/08 12:46:49 -0800
*.. The main idea of making this PR was to notify about some places that **may** run faster ..*
I am also unsure the optimization is really an optimization, care to benchmark (with meaningful inputs)? As for the limit+1 thing, why would you want to +1 it? The number of ``list`` arguments should always reflect the ``limit`` parameter, no?
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by pulzarraider at 2011/12/08 23:11:34 -0800
@helmer please try this simple benchmark:
```
<?php
header('Content-Type: text/plain; charset=UTF-8');
define('COUNT', 10000);
$source_string = 'aaaaaaaaaaaaaaaaaaaa:bbbbbbbbbbbbbbbbbbbbb:cccccccccccccccccccccccc:dddddddddddddddddddddd:eeeeeeeeeeeeeeeeeeeeeeeee:fffffffffffffffffffffffffff';
$start = microtime(true);
for ($i = 0; $i < COUNT; $i++) {
list($a, $b) = explode(':', $source_string);
}
$end = microtime(true)-$start;
echo 'without limit: '.$end."\n";
$start = microtime(true);
for ($i = 0; $i < COUNT; $i++) {
list($a, $b) = explode(':', $source_string, 2);
}
$end = microtime(true)-$start;
echo 'with limit: '.$end."\n";
```
My results are:
```
without limit: 0.057228803634644
with limit: 0.028676986694336
```
That is 50% difference (with APC enabled). Of course the result depends on the length of source string and if it's too short, the difference may be none or very very small. That's why I said, that it **may** run faster and is just a micro optimization.
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by pulzarraider at 2011/12/08 23:18:12 -0800
@helmer And why +1? It depends on a code:
```
$source_string = 'aaaaaaaaaaaaaaaaaaaa:bbbbbbbbbbbbbbbbbbbbb:cccccccccccccccccccccccc';
list($a, $b) = explode(':', $source_string, 2);
var_dump($a, $b);
```
and
```
$source_string = 'aaaaaaaaaaaaaaaaaaaa:bbbbbbbbbbbbbbbbbbbbb:cccccccccccccccccccccccc';
list($a, $b) = explode(':', $source_string, 3);
var_dump($a, $b);
```
gives different results. That's why the content of the variable must be known.
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by helmer at 2011/12/09 00:08:28 -0800
@pulzarraider Thanks for the benchmark, seems like a gain enough. Although, we are more likely having a scenario of:
``explode(':', 'a🅱️c')`` vs ``explode(':', 'a🅱️c', 3)`` with a ``COUNT`` of 10, where the difference is not even in microseconds anymore :)
The limit addition alters the behaviour though, ie suddenly you can define a controller [logical name](http://symfony.com/doc/current/book/routing.html#controller-string-syntax) as ´´AcmeBlogBundle:Blog:show:something``, and things go downhill from there on.
All that aside, I'm +1 for setting the limit to the exact number of ``list`` parameters, but certainly not number+1, this is just too wtfy (as you said, this was a safety thing, but I reckon for this PR to be merged it needs to be +0).
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by drak at 2011/12/09 08:28:58 -0800
Overall `list()` is ugly as it's not very explicit. Even though it would mean extra lines, it's better to `explode()` then explicitly assign variables:
```
$parts = explode(':', $foo);
$name = $parts[0];
$tel = $parts[1];
```
`list()` is one of those bad relics from the PHP past...
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by fabpot at 2011/12/11 10:07:47 -0800
@drak: why is `list` not explicit? It is in fact as explicit as the more verbose syntax you propose.
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by pulzarraider at 2011/12/11 13:08:50 -0800
@drak: I agree with @fabpot. In speech of benchmarks ```list``` is faster then using a helper variable.
@fabpot, @helmer I've changed explode's limit to be correct (without +1) and removed some changes from this PR, where I can't find out what the content of variable may be. Unit tests pass, so I think it's ready for merge.
Commits
-------
db2d773 [FrameworkBundle] Improve the TemplateLocator exception message
Discussion
----------
Template locator/exception message
Bug fix: no
Feature addition: no
Backwards compatibility break: no
Symfony2 tests pass: yes
Improve the error message to include the error message from the File Locator which is more accurate : the File Locator might also look in some fallback folder(s) (i.e. `%kernel.root_dir%/Resources`)
If a request listener returns a response before calling the profiler
listener, the request will not be added in the stack leading to an error
during the handling of the kernel.response event. The profiler listener
should ideally be run first.
Commits
-------
ae342c7 unified toolbar.css
a7e4e70 unified profiler.css
09fe09e unified and corrected exception_layout.css
3a1674b unified and corrected exception.css
Discussion
----------
Unified and corrected CSS markup
Unified (spaces, braces, quotes, indention) and corrected (missing semicolon) the CSS markup.
Did not change any semantic, only markup!
@fabpot: New pull based on symfony:2.0 and changed formatting style as agreed in #2405
Commits
-------
731b28b [composer] add missing deps for FrameworkBundle
9c8f100 [composer] change ext/intl to the new ext-intl syntax
d535afe [composer] fix monolog-bridge composer.json, add more inter-component deps
9ade639 [composer] add composer.json
Discussion
----------
Composer
This PR adds a composer.json file for [composer](https://github.com/composer/composer) ([more info](packagist.org/about-composer)).
For discussion you can also go into #composer-dev on freenode and argue with naderman, seldaek and everzet.
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by naderman at 2011/09/26 15:51:51 -0700
You haven't entered any keywords, they might come in handy when searching for packages on packagist.
But really this is just a +1 ;-)
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by stof at 2011/09/26 16:12:21 -0700
See my comments on your previous (non-rebased) commit: f1c0242b5a
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by igorw at 2011/09/27 00:04:36 -0700
Following dependencies do not have a composer.json yet: Twig, Doctrine (orm, dbal, common), swiftmailer.
Also missing from the standard edition: assetic, twig-extensions, jsm-metadata, SensioFrameworkExtraBundle, JMSSecurityExtraBundle, SensioDistributionBundle, SensioGeneratorBundle, AsseticBundle.
The point is, those can be added later on. Having the components composerized is already a leap forward. Also, doctrine depends on some symfony components, we've got to start somewhere.
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by Seldaek at 2011/09/27 00:36:41 -0700
Also, just for information, the plan is to have `symfony/framework-bundle` be the "framework", with all dependencies to doctrine etc, though we should really only have strict requirements in there, and then in symfony-standard we ship a composer.json that requires the framework-bundle, doctrine-orm and things like that that are not essential to core. Otherwise people don't have a choice about what they use anymore.
Just a comment btw, the json is invalid, all / should be escaped. However json_decode is nice enough to parse those without complaining, browsers do too, even Crockford's json2.js does, so I'm not sure if we should privilege readability over strictness, since it seems nobody really cares about this escaping.
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by igorw at 2011/09/27 00:41:39 -0700
So, I've implemented all of @stof's suggestions, except (for reasons stated above):
* doctrine to DoctrineBundle
* swiftmailer to SwiftmailerBundle
* twig to TwigBundle
* doctrine-common to Validator
* FrameworkBundle (what exactly does it depend on?)
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by stof at 2011/09/27 00:52:31 -0700
@igorw at least HttpKernel, Routing, Templating, EventDispatcher, Doctrine Common (annotations cannot be disabled), Translator, Form (optional), Validator (optional), Console (optional). See the service definitions to see the others
@Seldaek FrameworkBundle does not depend on Doctrine, except for Common
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by beberlei at 2011/09/27 03:15:34 -0700
What does the symfony/ or ext/ prefix control in composer?
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by Seldaek at 2011/09/27 03:33:52 -0700
symfony/ is just the (mandatory) vendor namespace. Also ext/ has been renamed to ext- now, so it's not in any vendor, and should avoid potential issues.
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by beberlei at 2011/09/27 05:07:03 -0700
@Seldaek Mandatory? So every package name is "vendor/package"? I like that because previously i thought package names are not namespaced, and thus clashes could occur between different communities easily.
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by Seldaek at 2011/09/27 05:16:20 -0700
@beberlei: Mandatory. As of yesterday http://packagist.org/ will tell you you have an invalid package name if there's no slash in it. See 1306d1ca82 (diff-3)
