Low-Cal Vanilla

Dinoboff · August 2007

Low-Cal Vanilla

mis-one · August 2007

This worked well. So far no issues. Thanks for the release!

rayk · August 2007

Oh wow, gonna give this a go!

edit: No issues so far, think the pages are loading faster.

Lussumo Bot · August 2007

Uploaded version 0.1.1 of Low-Cal Vanilla.

AlexL · August 2007

as i understand it using gzencode would be a lot faster than using capture !?

ChadFenwick · August 2007

Pretty cool... Nothing wrong yet. And it does seem they are loading a little faster. Hard to tell on a broadband connection.

Dinoboff · August 2007

@AlexL: capture?!

Wanderer · August 2007

Wow ... wow!
How does this work?
Absolutely incredible, it's like I've doubled the speed of my broadband connection!
I hope it's not a coincidence!

Posted: Sunday, 26 August 2007 at 12:56PM

Vaz · August 2007

Seems to be working great. My page has speeded up 1second. I should have added some page loading time code and tested it out!.. lazy me

AlexL · August 2007

@Dinoboff
you are using the ob_get_contents, ob_end_flush and so on commands, they are *really* slow

try something like

if(strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false) {
  /* header stuff? don't know right now, sry */
  echo gzencode($content);
} else
  echo $content;

you can use microtime(true); to compare times.
The function returns milliseconds (as float), so run it before and after the block, substract the times and compare to gzencode

Dinoboff · August 2007

I just tried with the following code:


class LowCalVanilla extends Control {

	function Render() {
		$t1 = microtime(true);
		// This is only defined if gunzip extension is installed
		if ( defined('FORCE_GZIP')
		&&	 strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false
		) {
			// Get the content of the page
			$content = ob_get_contents();
			ob_clean();
			echo gzencode($content);
			header('Vary: Accept-Encoding');
			header('Content-Encoding: gzip');
			header('Content-Length: ' . ob_get_length());
			$t2 = microtime(true);
			$t = $t2 - $t1;
			header('Time: ' . $t);
		}
	}

	function LowCalVanilla(&$Context) {
		$this->Name = 'LowCalVanilla';
		$this->Control($Context);
	}
}

And the result is similar.

Update:

New version:
Time=0.000478029251099
Time=0.000461101531982
Time=0.000349044799805
Time=0.000463962554932
Time=0.000473976135254

Previous:
Time=0.000494003295898
Time=0.000475883483887
Time=0.000339984893799
Time=0.000487089157104
Time=0.000330924987793

Server=Apache/2.2.4 (Win32) DAV/2 mod_ssl/2.2.4 OpenSSL/0.9.8e mod_autoindex_color PHP/5.2.3
Windows vista Intel Core 2 6600 @ 2.40 GHz; 2GB of RAM

Stash · August 2007

Here's a little analysis...

	Mean	% Improvement	Median	% Improvement
Old	0.000425577	—	0.000425577	—
New	0.000445223	-4.41	0.000463963	2.57

AlexL · August 2007

mh thats far far less than I expected, sorry for the extra work but the ob_ functions actually being faster is just impossible. I guess both are just too fast for a good measurement ( < 0,5 ms ) the extra headers shouldn't be neccassary anymore? either way they go before echo ;) @stash nice one, but I'm not quite sure what your 3rd columt is?

Stash · August 2007

Oops, cut 'n paste error. It was meant to say Median not Mean again. Edited and corrected.

dan39 · August 2007

If a server's already set up to use mod_gzip, then the addon isn't necessary, right?

AlexL · August 2007

not sure... is the server or just php set up to du so?

Wanderer · August 2007

I am still stunned by the speed bump due to this add-on.
Why isn't whatever it does on by default?
Even Mac Firefox is actually fast with this!
As AlexL asks, is this a server thing or a PHP setting?

Posted: Thursday, 30 August 2007 at 2:00PM

Dinoboff · August 2007

Like dan said, the server can compress your output. But on a share hosting you won't have access to these settings and it will be turned off.
For this addon, it's php who compress the output. You need to have the zlib php extension installed. The addon check it is installed.

AlexL · August 2007

oh yeah sry, I was thinking of css and js files. if you have php set to compress output (php.ini) you do NOT need this addon [ @Dinoboff maybe add a check? so output won't be compressed twice ] css and js files are not compressed by this addon. there is still quite some optimization possible

Dinoboff · August 2007

I forgot php can compress by default... I will add a check.
You should always check your pages are not already encoded before installing the add-on:
eg, use the Web Developer toolbar and check for "Content-Encoding: gzip" for the response header (Web Developer > Information > View response header) and the pages size (Web Developer > Information > View Document Size - check if it gives you a compressed size and an uncompressed size for the document).

There is also these problem with some versions of IE:

ithcy · August 2007

the user-agent header

$_SERVER['HTTP_USER_AGENT']

http://www.zytrax.com/tech/web/browser_ids.htm#msie

Low-Cal Vanilla

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