Improve your website speed

Improve your website speed

Published on September 26th, 2009 by admin in Design

The following is a list of things you can do to help improve your website loading speed.

Use GZip compression for CSS, Javascript etc. Check your site here.
Minimize your javascript. You can use JMin for this.
Remove ETags
Set Header Expires to future
Put scripts at the bottom of the page

GZip compression can be controlled in Apache servers using .htaccess -

SetOutputFilter DEFLATE

php_flag zlib.output_compression On php_value zlib.output_compression_level 5

You can also remove Etags and set Header Expires in. htaccess using the following -

ExpiresActive On ExpiresDefault "access plus 12 hours" ExpiresByType image/gif "access plus 2 month" ExpiresByType image/png "access plus 2 month" ExpiresByType image/jpeg "access plus 2 month" ExpiresByType image/ico A2592000 ExpiresByType text/javascript "access plus 2 month" ExpiresByType text/css "access plus 2 month" FileETag none

How to enable GZip in Centos 5

1 . Login to SSH and create a file in the following location
/etc/httpd/conf.d/deflate.conf


2. Insert the following into the file you just created and save it

# Insert filter

SetOutputFilter DEFLATE
# Netscape 4.x has some problems...

BrowserMatch ^Mozilla/4 gzip-only-text/html
# Netscape 4.06-4.08 have some more problems

BrowserMatch ^Mozilla/4.0[678] no-gzip
# MSIE masquerades as Netscape, but it is fine

BrowserMatch bMSIE !no-gzip !gzip-only-text/html
# Don't compress images

SetEnvIfNoCase Request_URI .(?:gif|jpe?g|png)$ no-gzip dont-vary
# Don't compress already compressed stuff !

SetEnvIfNoCase Request_URI .(?:exe|t?gz|zip|bz2|sit|rar)$ no-gzip dont-vary

SetEnvIfNoCase Request_URI .pdf$ no-gzip dont-vary
# Make sure proxies don't deliver the wrong content

Header append Vary User-Agent env=!dont-vary

# Log Stuff ! # 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 /var/log/httpd/deflate_log deflate

3. Restart Apache and you are finished
/etc/init.d/httpd restart