Comments on: Using mod_concat to Speed Up Start Render Times http://www.artzstudio.com/2008/08/using-modconcat-to-speed-up-render-start/ Dave Artz and his discoveries in web design and development. Fri, 29 Jan 2010 19:09:28 -0800 http://wordpress.org/?v=2.8.6 hourly 1 By: Kai’s daily tech #38 … | Kai Richard König http://www.artzstudio.com/2008/08/using-modconcat-to-speed-up-render-start/comment-page-1/#comment-4975 Kai’s daily tech #38 … | Kai Richard König Mon, 13 Jul 2009 20:04:33 +0000 http://www.artzstudio.com/?p=45#comment-4975 [...] Combining CSS & JS with mod concat: Code Concatenation [...] [...] Combining CSS & JS with mod concat: Code Concatenation [...]

]]> By: Vivek Pohre http://www.artzstudio.com/2008/08/using-modconcat-to-speed-up-render-start/comment-page-1/#comment-382 Vivek Pohre Thu, 13 Nov 2008 17:37:34 +0000 http://www.artzstudio.com/?p=45#comment-382 Hi Dave, I am a fan of your blog and optimization.aol.com I wanted to understand the fact of render time in a very very simple language. Can you please explain me. I want to know in terms of request>response>download>display. Thanks, Vivek Hi Dave,
I am a fan of your blog and optimization.aol.com
I wanted to understand the fact of render time in a very very simple language. Can you please explain me. I want to know in terms of request>response>download>display.

Thanks,
Vivek

]]> By: 20 Ultimate Wordpress Plugins - Čolović Vladan http://www.artzstudio.com/2008/08/using-modconcat-to-speed-up-render-start/comment-page-1/#comment-215 20 Ultimate Wordpress Plugins - Čolović Vladan Mon, 29 Sep 2008 23:48:37 +0000 http://www.artzstudio.com/?p=45#comment-215 [...] PHP Speedy WP » Compress CSS and JS in one - alternative solution. Read this post for great analysis of possible solutions to a problem. [...] [...] PHP Speedy WP » Compress CSS and JS in one – alternative solution. Read this post for great analysis of possible solutions to a problem. [...]

]]> By: ijlal http://www.artzstudio.com/2008/08/using-modconcat-to-speed-up-render-start/comment-page-1/#comment-191 ijlal Sun, 21 Sep 2008 00:20:50 +0000 http://www.artzstudio.com/?p=45#comment-191 Can someone give me the mod_concat.so file..... i am on windows and dont have proper tools to build and compile the .c file. Thanking in anticipation. Regards Can someone give me the mod_concat.so file….. i am on windows and dont have proper tools to build and compile the .c file.
Thanking in anticipation.
Regards

]]> By: Greg http://www.artzstudio.com/2008/08/using-modconcat-to-speed-up-render-start/comment-page-1/#comment-109 Greg Sat, 09 Aug 2008 12:45:49 +0000 http://www.artzstudio.com/?p=45#comment-109 By the way what is the issue related with security? By the way what is the issue related with security?

]]> By: Greg http://www.artzstudio.com/2008/08/using-modconcat-to-speed-up-render-start/comment-page-1/#comment-108 Greg Fri, 08 Aug 2008 21:44:53 +0000 http://www.artzstudio.com/?p=45#comment-108 I like Rakaz’s PHP Combine Solution too because of it's caching capability on server. On the other end i couldn't have different paths files combined in once like with mod_concat. I welcome ideas on how to best use these or to gain from both. I like Rakaz’s PHP Combine Solution too because of it’s caching capability on server. On the other end i couldn’t have different paths files combined in once like with mod_concat. I welcome ideas on how to best use these or to gain from both.

]]> By: ArtzStudio http://www.artzstudio.com/2008/08/using-modconcat-to-speed-up-render-start/comment-page-1/#comment-95 ArtzStudio Fri, 01 Aug 2008 17:54:13 +0000 http://www.artzstudio.com/?p=45#comment-95 <p>Hmm, I logged this in memory at some point, and I traced this back to the following article: <a href="http://www.thinkvitamin.com/features/webapps/serving-javascript-fast" rel="nofollow">Serving JavaScript Fast</a>.</p> <p>I also found a few other mentions:</p> <ul><li><a href="http://www.sitepoint.com/forums/showthread.php?t=551724" rel="nofollow">Safari: no cache for files when they have variables in query string?</a></li> <li><a href="http://css-tricks.com/update-on-css-caching/#comment-16328" rel="nofollow">CSS Caching, see Comments</a></li> <li><a href="http://www.techlists.org/archives/programming/railslist/2006-05/msg04915.shtml" rel="nofollow">Query Strings and Browser Caching</a></li> <li><a href="http://particletree.com/notebook/automatically-version-your-css-and-javascript-files/#comment-24520" rel="nofollow">Version your CSS/JS, a comment</a></li> </ul> <p><a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13.9" rel="nofollow">Section 13.9 of the HTTP/1.1: Caching in HTTP spec</a> says:</p> <p><i>We note one exception to this rule: since some applications have traditionally used GETs and HEADs with query URLs (those containing a "?" in the rel_path part) to perform operations with significant side effects, caches MUST NOT treat responses to such URIs as fresh unless the server provides an explicit expiration time. This specifically means that responses from HTTP/1.0 servers for such URIs SHOULD NOT be taken from a cache.</i></p> <p>I think people may be misinterpreting the spec - it seems HTTP/1.1 should respect the cache headers, but HTTP/1.0 should not (and thus why Opera and Safari may not).</p> <p>This guy claims all browsers respect the cache control headers with query parameters: <a href="http://www.mnot.net/blog/2006/05/11/browser_caching" rel="nofollow">The State of Browser Caching</a> but no specifics if his tests were HTTP/1.1 or HTTP/1.0.</p> <p>If what you say is true, I need to update my brain (and this article). This may give me an excuse to install <a href="http://michelf.com/projects/multi-safari/" rel="nofollow">Multi-Safari</a> and test on AOL's servers as they use HTTP/1.0 to gain 4 parallel connections in IE. Anybody have any test data here?</p> Hmm, I logged this in memory at some point, and I traced this back to the following article: Serving JavaScript Fast.

I also found a few other mentions:

Section 13.9 of the HTTP/1.1: Caching in HTTP spec says:

We note one exception to this rule: since some applications have traditionally used GETs and HEADs with query URLs (those containing a “?” in the rel_path part) to perform operations with significant side effects, caches MUST NOT treat responses to such URIs as fresh unless the server provides an explicit expiration time. This specifically means that responses from HTTP/1.0 servers for such URIs SHOULD NOT be taken from a cache.

I think people may be misinterpreting the spec – it seems HTTP/1.1 should respect the cache headers, but HTTP/1.0 should not (and thus why Opera and Safari may not).

This guy claims all browsers respect the cache control headers with query parameters: The State of Browser Caching but no specifics if his tests were HTTP/1.1 or HTTP/1.0.

If what you say is true, I need to update my brain (and this article). This may give me an excuse to install Multi-Safari and test on AOL’s servers as they use HTTP/1.0 to gain 4 parallel connections in IE. Anybody have any test data here?

]]> By: Chris Griego http://www.artzstudio.com/2008/08/using-modconcat-to-speed-up-render-start/comment-page-1/#comment-94 Chris Griego Fri, 01 Aug 2008 16:39:13 +0000 http://www.artzstudio.com/?p=45#comment-94 Dave, what versions of Safari and Opera are you basing the statement that query strings causes these browsers to not honor cache control headers? In my tests with Safari 3 and Opera 9, they both appear to honor Expires headers used with query strings. Dave, what versions of Safari and Opera are you basing the statement that query strings causes these browsers to not honor cache control headers? In my tests with Safari 3 and Opera 9, they both appear to honor Expires headers used with query strings.

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