Explorer Demo: Performance loading first time

[majain]

Darell,

The initial loading of Explorer Demo is taking anywhere from 8 to 12 seconds. Same is true for my Ext GWT custom app.

However, the subsequent loading of forms/pages is almost instantaneous.

I do have a loading-indicator on the initial screen like yours.

Is there an easy way to reduce this initial loading either thro' compression or any other means?

Thanks,
Majain

[Cameron Braid]

Yeah, they should configure their apache server to use mod_deflate.

This would would compress the 570k .cache.html file down to around 170k

[majain]

Thanks for your reply.

I've my app deployed into weblogic with apache in the front.

Would mod_deflate configuration on apache still work?

Thanks in advance.
Majain

[Cameron Braid]

yes - I run my webapp in tomcat and use mod_proxy to connect apache to tomcat.

[majain]

Thanks. I'll give a try.

[majain]

I've added the following lines to the end of conf/httpd.conf file:

LoadModule deflate_module modules/mod_deflate.so

AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/javascript

But I see no difference in file sizes and download times.

Any insight?

[majain]

Darell,

Is it possible to configure the Explorer Demo website to use http compression either via using mod_deflate or other means?

This would help demonstrate how to boost performance of Explorer Demo sample and EXT GWT apps in general.

Thanks,
majain

[darrellmeyer]

mod_deflate was activated last night:

http://www.whatsmyip.org/mod_gzip_test/
http://extjs.com/explorer/438A57D6F7DB2B372272AC19C05E9728.cache.html

Original Size: 567 KB
Gzipped Size: 168 KB
Data Savings: 70.37%

[majain]

Awesome!!!

Btw, I've added the following lines to the end of conf/httpd.conf file but I see no difference in download time.

LoadModule deflate_module modules/mod_deflate.so

AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/javascript


This is what I see in the apache access log:

[30/Apr/2008:15:15:40 -0400] "GET /gwttool/3D1D2CCD0EBB19BA2C5A699A2CC28B65.cache.html HTTP/1.1" 304 -

Am I missing anything?

I appreciate your response.

Thanks,
Majain

[majain]

I also added loggin as follows but the deflate.log is always empty.

DeflateFilterNote Input input_info
DeflateFilterNote Output output_info
DeflateFilterNote Ratio ratio_info
LogFormat '"%r" %{output_info}n/%{input_info}n (%{ratio_info}n%%)' deflate
CustomLog logs/deflate.log deflate

[majain]

Never mind. I'd screwed the logs and couldn't see the changes.

It looks much better now.

Thanks
Majain

[irwinm]

Darrell,

Could you please describe how you set up your configuration for the demo application?

I have been following this thread and have done the config as described, but I am still not seeing any compression happening for my app. Maybe a snapshot of your config?

Thanks so much.

[majain]

Darell,

Do you think you can post the snapshot of your apache config that enables compression for Explorer demo?

Thanks.

[darrellmeyer]

From a earlier post in this thead:

mod_deflate was activated last night:

http://www.whatsmyip.org/mod_gzip_test/
http://extjs.com/explorer/438A57D6F7...728.cache.html (http://extjs.com/forum/../explorer/438A57D6F7DB2B372272AC19C05E9728.cache.html)

Original Size: 567 KB
Gzipped Size: 168 KB
Data Savings: 70.37%

Are you not seeing this?

[ExtRocks]

LoadModule deflate_module modules/mod_deflate.so

AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE image/svg+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/atom_xml
AddOutputFilterByType DEFLATE application/x-javascript
AddOutputFilterByType DEFLATE application/x-httpd-php
AddOutputFilterByType DEFLATE application/x-httpd-fastphp
AddOutputFilterByType DEFLATE application/x-httpd-eruby
AddOutputFilterByType DEFLATE text/html
#Highest 9 - Lowest 1
DeflateCompressionLevel 9

#Optional
#Skip browsers with known problems
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\.0[678] no-gzip
BrowserMatch \bMSIE !no-gzip !gzip-only-text/html

#Optional
#Logging
DeflateFilterNote ratio
LogFormat '"%r" %b (%{ratio}n) "%{User-agent}i"' deflate
CustomLog /etc/httpd/logs/deflate_log deflate