Optimization - Firebug Page Speed Recommendations

24 Jun 2009, 10:08

#1

Totally Zenned

Join Date:: Feb 2009
Posts:: 1,326
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Optimization - Firebug Page Speed Recommendations

Hi,

I've just started to look at Page Speed to aid in the optimization my Site.

Looking at the 'High Priority' recommendations, I'm unsure whether I need to address them or not:

1. Enable Gzip Compression - lists certain css files (and a lightbox .js file) as being able to benefit from compression. This seems strange as I have gzip enabled in Admin. btw, websiteoptimization.com recognises my gzip.
2. Leverage Browser Caching - css and gif files listed here are 'missing a cache expiration' ...????
3. Parallelize downloads across hostnames - again, refers to css and gif files on the page.

Any ideas as to whether I need to address these and if so how?

Using 1.3.8a
link to my website is here

thanks

Simon

19 Jan 2010, 21:45

#2

skipwater

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Join Date:: Jun 2008
Posts:: 775
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Re: Optimization - Firebug Page Speed Recommendations

I have been working on this issue. And I am only six months behind.

With Google pushing there web tools it seems that when a customer finds the Site performance section and then they install the "Page Speed browser add-on" and they get the 'High Priority' recommendations. They want to know WHY they are not fixed.

Because ZC GZip Compression is unrelated to the css or js files, a work around was needed.

So what I have found is a way that you can use GZip Compression for your css files and your java script files. Eliminating these from the 'High Priority' recommendation list. And at the same time increase the speed of ZC page load.

The attached zip contains 5 files 2 for css folder and 2 for jscript folder and a readme file.

Skip

18 Apr 2010, 07:31

#3

wingc3

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Join Date:: Mar 2009
Posts:: 75
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Re: Optimization - Firebug Page Speed Recommendations

Now will those also solve the issue of Parallelize downloads across hostnames? Or will it only solve the GZip compression issue?

18 Apr 2010, 09:51

#4

skipwater

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Re: Optimization - Firebug Page Speed Recommendations

This patch is only for a ZC domain files, files on other domains are not effected.

Skip

18 Apr 2010, 11:09

#5

wingc3

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Re: Optimization - Firebug Page Speed Recommendations

Sounds good! Thanks.

11 Aug 2010, 20:16

#6

wingc3

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Re: Optimization - Firebug Page Speed Recommendations

Just an update Skip, when I apply your zip file on my test sites it somehow breaks all the sites. I was testing this on Cherry Zen Template.

It causes the images and text to become distorted. You can test this on a cherry zen template to see what I mean.

11 Sep 2010, 09:32

#7

eostre

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Join Date:: Apr 2005
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Re: Optimization - Firebug Page Speed Recommendations

To make sure I undertand this:
When I use these files (download), do I need to enable the GZip Compression, Yes or No?

Because in the tutorial of ZC there is mentioned that when your server php configuration does "output_buffering", it's better not to enable the GZip Compression, it will slow down your site...
Read this: https://www.zen-cart.com/tutorials/index.php?article=255

Can someone tell me about this isue?

11 Sep 2010, 19:03

#8

skipwater

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Join Date:: Jun 2008
Posts:: 775
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Re: Optimization - Firebug Page Speed Recommendations

eOstrE:
To make sure I undertand this:
When I use these files (download), do I need to enable the GZip Compression, Yes or No?

Can someone tell me about this isue?

Short answer yes running gzip on the site will increase its speed. But there is alot of ifs.

If you look in the htaccess file the 'output compress On' is commented out and not used.
# php_flag zlib.output_compression On
this is due to the tutorial saying you do not want it to run twice.

Here is a link the-definitive-css-gzip-method will help explain what these files are trying to do.

Skip

29 Sep 2010, 16:03

#9

lazzo85

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Join Date:: Sep 2007
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Re: Optimization - Firebug Page Speed Recommendations

For the problem "Leverage Browser Caching"...
How I resolve?