Hacking WP Super Cache for Speed

FREE THOUGHT · FREE SOFTWARE · FREE WORLD

# BEGIN WordPress
 
SetEnv HTTP_IF_GZ_MATCH .html
SetEnvIfNoCase ^Accept-Encoding$ "(.*gzip.*)" HTTP_IF_GZ_MATCH=.html.gz
 
RewriteCond %{ENV:REDIRECT_STATUS} !=200
RewriteCond %{QUERY_STRING} !s
RewriteCond %{THE_REQUEST} ^[A-Z]{3,9}\ /(.+)\ HTTP/ [NC]
RewriteCond %{HTTP_COOKIE} !^.*(comment_author_|wordpress|wp-postpass_).*$
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{HTTP_HOST}/%1/index%{ENV:HTTP_IF_GZ_MATCH} -f
RewriteRule ^(.*)$ /wp-content/cache/supercache/$1/index%{ENV:HTTP_IF_GZ_MATCH} [L,NC]
 
# END WordPress

# BEGIN WordPress
 
RewriteEngine On
RewriteBase /
RewriteCond %{QUERY_STRING} !.*s=.*
RewriteCond %{HTTP_COOKIE} !^.*comment_author_.*$
RewriteCond %{HTTP_COOKIE} !^.*wordpress.*$
RewriteCond %{HTTP_COOKIE} !^.*wp-postpass_.*$
RewriteCond %{HTTP:Accept-Encoding} gzip
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html.gz -f
RewriteRule ^(.*) /wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html.gz [L]
 
RewriteCond %{QUERY_STRING} !.*s=.*
RewriteCond %{HTTP_COOKIE} !^.*comment_author_.*$
RewriteCond %{HTTP_COOKIE} !^.*wordpress.*$
RewriteCond %{HTTP_COOKIE} !^.*wp-postpass_.*$
RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html -f
RewriteRule ^(.*) /wp-content/cache/supercache/%{HTTP_HOST}/$1/index.html [L]
 
# END WordPress

Reader Comments

1. ticktock ~

   1 question – how does one ask apache to log performance metrics of an .htaccess file?

2. erick ~

   Data caching provides the most granular control of cached data. The data cache is a full-featured cache engine that enables you to store and retrieve data between multiple HTTP requests and multiple sessions within the same application. There are three different methods that you can use to add data or objects to the cache.

3. Sunshine ~

   When using the code with AudioPlayer 2.0b plugin the audio doesn’t play in Firefox and in IE it is compressing the audio and putting noise in it. What needs to be changed to work with audio player?

   Overall it works great and load the site extremely fast.

4. Donace ~

   you got a due date on that inhouse plugin release? or will it remain in house?

5. AskApache ~

   I ended up just making my own caching plugin which is still in house.. Its pretty cool for pimping this server out. Right now I’m serving up both text/html application/xhtml+xml… Both of which are available in gzip as well and both of which validate as strict as it goes.

   I’ve been playing around with other forms of media that I can also incorporate.. I’ve already added custom rdf files for every page using the same caching system which I might release when I finish with this password protection upgrade.

   Its based on my lightning cache plugin.

   —

   Here’s some of the code I’m at today if it helps..

   RewriteCond %{REQUEST_METHOD} !^(GET|HEAD) [OR]
   RewriteCond %{QUERY_STRING} !^$ [OR]
   RewriteCond %{HTTP_COOKIE} ^.*(comment_author_|wordpress|wp-postpass_).*$ [NC]
   RewriteRule ^(.*)$ – [S=6]

   RewriteCond %{HTTP_USER_AGENT} .*W3C_Validator.* [NC]
   RewriteCond %{HTTP:Accept-Encoding} gzip [NC]
   RewriteCond %{DOCUMENT_ROOT}/fast-cache/$1/index.xhtml.gz -f
   RewriteRule ^(.*)$ /fast-cache/$1/index.xhtml.gz [L,S=5]

   RewriteCond %{HTTP:Accept} application/xhtml\+xml [NC]
   RewriteCond %{HTTP:Accept-Encoding} gzip [NC]
   RewriteCond %{DOCUMENT_ROOT}/fast-cache/$1/index.xhtml.gz -f
   RewriteRule ^(.*)$ /fast-cache/$1/index.xhtml.gz [L,S=4]

   RewriteCond %{HTTP:Accept-Encoding} gzip [NC]
   RewriteCond %{DOCUMENT_ROOT}/fast-cache/$1/index.html.gz -f
   RewriteRule ^(.*)$ /fast-cache/$1/index.html.gz [L,S=3]

   RewriteCond %{HTTP_USER_AGENT} .*W3C_Validator.* [NC]
   RewriteCond %{DOCUMENT_ROOT}/fast-cache/$1/index.xhtml -f
   RewriteRule ^(.*)$ /fast-cache/$1/index.xhtml [L,S=2]

   RewriteCond %{HTTP:Accept} application/xhtml\+xml [NC]
   RewriteCond %{DOCUMENT_ROOT}/fast-cache/$1/index.xhtml -f
   RewriteRule ^(.*)$ /fast-cache/$1/index.xhtml [L,S=1]

   RewriteCond %{DOCUMENT_ROOT}/fast-cache/$1/index.html -f
   RewriteRule ^(.*)$ /fast-cache/$1/index.html [L]

   FileETag None

   AddEncoding x-gzip .gz

   AddType ‘application/xhtml+xml; charset=UTF-8′ .xhtml
   AddType ‘text/html; charset=UTF-8′ .html

   Header set P3P “policyref=\”http://www.askapache.com/w3c/p3p.xml\”"
   Header set Content-Language “en-US”

   # BEGIN AskApache Crazy Cache
   FileETag All

   AddEncoding x-gzip .gz

   AddType ‘application/xhtml+xml; charset=UTF-8′ .xhtml
   AddType ‘application/xhtml+xml; charset=UTF-8′ .xhtml.gz

   AddType ‘text/html; charset=UTF-8′ .html
   AddType ‘text/html; charset=UTF-8′ .html.gz

   Header set P3P “policyref=\”http://www.askapache.com/w3c/p3p.xml\”"
   Header set X-Pingback “http://www.askapache.com/xmlrpc.php”
   Header set Content-Language “en-US”
   Header set Vary “Accept-Encoding,Accept”

   ExpiresActive On
   ExpiresDefault A3600

   # END AskApache Crazy Cache

6. Mike ~

   While I agree that the rules aren’t entirely optimal, there’s a problem with your ruleset.

   “RewriteCond %{HTTP:Accept-Encoding} gzip” in the original causes a Vary: Accept-Encoding header to be appended if the rule passes as true.

   Without that header, a front-end or intermediate cache could, for example, send cached gzipped content to a UA that doesn’t support it.

7. AskApache ~

   @ Stuart

   Thank you for taking the time to let me know, I’ve added the date under the title great suggestion!

   This article of mine really isn’t that good to begin with, I’m still waiting on more improvements before I switch from wp-cache.

8. stuart ~

   I agree with the other comment, I’ve just been looking for a date and I’m not sure if this article is still valid.
   offtopic: his name is stuart aswell, what are the odds?

9. Stuart ~

   Hi, do you think you could put the date somewhere on the post. It’s a little annoying landing here from google and not knowing if what I’m reading is fresh or outdated, especially when it says stuff like this article says.

   To find the date of this particular page I had to go to your homepage, look down the sidebar, click on the ‘Cache’ tag, and find the excerpt among the index listings. Not high usability by any means :(

It's very simple - you read the protocol and write the code. -Bill Joy

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