Suggestions on how to improve this .htaccess file for page load speed

Here is my standard .htaccess file, any suggestions on how I can improve it with regards to page load speed? Would gZip instead of DEFLATE make any sort of difference?

ExpiresActive On
RewriteEngine on
RewriteBase /

# compress text, html, javascript, css, xml:
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/javascript
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript

# Expires 1 month after file is first accessed
ExpiresByType image/jpeg A2592000
ExpiresByType image/jpg A2592000
ExpiresByType image/gif A2592000
ExpiresByType image/png A2592000
ExpiresByType image/x-icon A2592000
ExpiresByType text/plain A2592000

# Expires 1 month after file is modified
ExpiresByType application/x-javascript M2592000
ExpiresByType text/css M2592000
ExpiresByType text/javascript M2592000
ExpiresByType text/html M2592000

Honestly, this looks OK, though you could clean it up a little bit.

You have two ways to make this code better:

• group related mime types.

• use human-readable syntax

Regarding point #2, here's part of the config I created after watching Illya Grigorik's presentation "Breaking the 1000ms Time to Glass Mobile Barrier":

# these are known to be safe with MSIE 6
AddOutputFilterByType DEFLATE text/html text/plain text/xml

# everything else may cause problems with MSIE 6
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/x-javascript application/javascript application/ecmascript
AddOutputFilterByType DEFLATE application/rss+xml

ExpiresActive On
ExpiresDefault "access plus 15 minutes"

ExpiresByType text/html "access"
ExpiresByType application/json "access"

ExpiresByType text/css "access plus 1 week"
ExpiresByType image/gif "access plus 1 week"
ExpiresByType image/png "access plus 1 week"
ExpiresByType image/jpeg "access plus 1 week"
ExpiresByType application/javascript "access plus 1 week"

You might also look into Google's mod_pagespeed for Apache.

StackExchange Code Review Q#4812, answer score: 3