Support » Plugin: WP Super Cache » Supercache can be ten times faster by using sane rewrite syntax

  • The rewrite rules used by WP Super Cache will run an order of magnitude faster by using sane syntax. Consider, for example, these two questions:

    Question 1:

    Does your name an an “a” in it?

    Question 2:

    Does your name have the following:
    Starting at the very beginning, some letters or symbols, or maybe none, followed by an “a”, followed by some letters or symbols, or not, all the way to the very end?

    The two questions are actually exactly the same. The second form just has a lot lot of extra words, requiring a lot more mental processing. WP Super Cache uses the second form, requiring a lot more CPU processing.

    For example, this line:
    RewriteCond %{REQUEST_URI} !^.*[^/]$

    The pattern means:
    If it is not true that, at the very beginning, there are some characters, or not, then any character that’s not a slash, at the very end.

    In other words, “if it ends with a slash” Which can much more more succinctly and efficiently written as:
    RewriteCond %{REQUEST_URI} /$

    These two mean exactly the same thing:
    RewriteCond %{REQUEST_URI} !^.*[^/]$
    and
    RewriteCond %{REQUEST_URI} /$

    It probably makes sense to get rid of the double negative and use the second, far simpler, way of saying it.

    Most of the lines have two pieces of silliness:
    RewriteCond %{QUERY_STRING} !^.*=.*$

    ^.* means “if the beginning has some characters, or not”. Since that’s always true, checking for it is just a waste of time.

    Similarly, .*$ means “if there’s anything at the end, or not”, which is again meaningless, it’s always true.

    So this:
    RewriteCond %{QUERY_STRING} !^.*=.*$
    becomes:
    RewriteCond %{QUERY_STRING} !=

    I’m guessing someone read our regex documentation where we say that an anchored pattern can be more efficient. That means a pattern that actually IS anchored. When you know you’re looking for “obama”, not for “dobama”, using the anchor means the finite state machine can stop after the first character if the first character isn’t “o”. A fake anchor like “^.*” doesn’t let it stop, though, it just creates a lot more states to keep track of.

    On another note, there’s no need to process the same set of conditions four times. The common conditions could come first, with a skip rule:
    RewriteRule . – [S=4]

    That will use or skip the four supercache rules with ONE checks of the long patterns, rather than repeating the same comparisons four times. Since it’s a skip, you would of course remove the negation (!) from the beginning of each rule and terminate them with the [OR] flag.

    Here a complete set with the double negatives and fake anchors removed. Maybe later I’ll post a skip set:

    # BEGIN WPSuperCache
    <IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    #If you serve pages from behind a proxy you may want to change 'RewriteCond %{HTTPS} on' to something more sensible
    AddDefaultCharset UTF-8
    RewriteCond %{REQUEST_URI} /$
    RewriteCond %{REQUEST_URI} !//
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !.*=.*
    RewriteCond %{HTTP:Cookie} !^.*(comment_author_|wordpress_logged_in|wp-postpass_).*$
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-).* [NC]
    RewriteCond %{HTTP:Accept-Encoding} gzip
    RewriteCond %{HTTPS} on
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-https.html.gz -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-https.html.gz" [L]
    
    RewriteCond %{REQUEST_URI} !^.*[^/]$
    RewriteCond %{REQUEST_URI} !^.*//.*$
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !.*=.*
    RewriteCond %{HTTP:Cookie} !^.*(comment_author_|wordpress_logged_in|wp-postpass_).*$
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-).* [NC]
    RewriteCond %{HTTP:Accept-Encoding} gzip
    RewriteCond %{HTTPS} !on
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html.gz -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html.gz" [L]
    
    RewriteCond %{REQUEST_URI} !^.*[^/]$
    RewriteCond %{REQUEST_URI} !^.*//.*$
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !.*=.*
    RewriteCond %{HTTP:Cookie} !^.*(comment_author_|wordpress_logged_in|wp-postpass_).*$
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-).* [NC]
    RewriteCond %{HTTPS} on
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-https.html -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-https.html" [L]
    
    RewriteCond %{REQUEST_URI} !^.*[^/]$
    RewriteCond %{REQUEST_URI} !^.*//.*$
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !.*=.*
    RewriteCond %{HTTP:Cookie} !^.*(comment_author_|wordpress_logged_in|wp-postpass_).*$
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-).* [NC]
    RewriteCond %{HTTPS} !on
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html" [L]
    </IfModule>
    
    # END WPSuperCache

    http://wordpress.org/extend/plugins/wp-super-cache/

Viewing 15 replies - 1 through 15 (of 21 total)
  • The wrong thing got pasted. The complete set should be:

    # BEGIN WPSuperCache
    <IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    #If you serve pages from behind a proxy you may want to change 'RewriteCond %{HTTPS} on' to something more sensible
    AddDefaultCharset UTF-8
    RewriteCond %{REQUEST_URI} /$
    RewriteCond %{REQUEST_URI} !//
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !=
    RewriteCond %{HTTP:Cookie} !(comment_author_|wordpress_logged_in|wp-postpass_)
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800) [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-) [NC]
    RewriteCond %{HTTP:Accept-Encoding} gzip
    RewriteCond %{HTTPS} on
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-https.html.gz -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-https.html.gz" [L]
    
    RewriteCond %{REQUEST_URI} /$
    RewriteCond %{REQUEST_URI} !//
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !=
    RewriteCond %{HTTP:Cookie} !(comment_author_|wordpress_logged_in|wp-postpass_)
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800) [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-) [NC]
    RewriteCond %{HTTP:Accept-Encoding} gzip
    RewriteCond %{HTTPS} !on
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html.gz -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html.gz" [L]
    
    RewriteCond %{REQUEST_URI} /$
    RewriteCond %{REQUEST_URI} !//
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !=
    RewriteCond %{HTTP:Cookie} !(comment_author_|wordpress_logged_in|wp-postpass_)
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800) [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-) [NC]
    RewriteCond %{HTTPS} on
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-https.html -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-https.html" [L]
    
    RewriteCond %{REQUEST_URI} /$
    RewriteCond %{REQUEST_URI} !//
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !=
    RewriteCond %{HTTP:Cookie} !(comment_author_|wordpress_logged_in|wp-postpass_)
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800) [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-) [NC]
    RewriteCond %{HTTPS} !on
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html" [L]
    </IfModule>
    
    # END WPSuperCache

    Plugin Author Donncha O Caoimh

    (@donncha)

    Does it really make a significant difference when these changes are made? Have you done any before and after benchmarking?

    It’s great to get someone knowledgeable in mod_rewrite looking at the rules though and I’ll try to incorporate all those changes.

    The difference in the speed of the .htaccess is huge* – somewhere between 10 and 100 times. That matters when it hits the cache, meaning it doesn’t run any PHP. On the other hand. when it doesn’t hit the cache and it runs thousands of lines of PHP, the rewrite isn’t significant compared to the PHP.

    I haven’t benchmarked it, but knowing the C code that it runs, there’s a huge difference in how many lines of code are run, and how many times key lines are repeated.

    I’ll be actually testing a new installation, with the skip rules, in the next 2-36 hours so I can confirm there are no typos. Shortly after posting above, I did realize I had one error. This:

    !^.*[^/]$

    Should become:
    /*$

    I was wrong when I said:
    /$

    The difference being the case where it’s empty, there’s no slash or any other characters. (Just mydomain.com)

    * The “huge” speed difference mostly matters only if you care about speed / load, of course. It’s not nearly the slowest thing in WordPress, by a long shot, but people use WP Supercache because speed / load matters to them. In an application like MS Word, other slowness would dwarf this difference.

    I’ll try to remember to follow up after this new site is tested. I’ve worked on the WPSC .htaccess before, but didn’t save it.

    Very interesting because more speed means also lower server load. I’m using php cache right now mainly because I can send 304s.

    blau: note that the documentation/comment for the 304 responses isn’t really right. Your site will send 304s (provided your server is configured correctly) when using mod_rewrite, because it is a static file, so apache will send a 304 for it just like any other static file on your site. I was just wondering about that supercache warning, and was thinking it should be rewritten better.

    raymor: It’d be great to see your skip rules. I’ve looked through the supercache rules before, and wondered about the performance implications.

    I’m not convinced your analysis of /*$ is correct though. Doesn’t that match anything, whether it ends with a / or not? I’m thinking the rule is trying to say match anything that ends with a slash, OR match ^$ I have no idea what scenario the double-slash rule is trying to match.

    While on the matter, I was wondering about a few things and would like to make some constructive suggestions:

    1) I think whether or not there’s support for HTTPS should be set up in the plugin’s settings page. If the site has no support for HTTPS – then there should be no reason to include the rewrite rules for HTTPS support.

    2) Since I selected to treat known users as anonymous, then there is no point in the rewrite condition that checks the %{HTTP:Cookie}

    3) Since I selected mobile support, then there is no reason why there shouldn’t be rewrite rules for those supported browsers, such as

    RewriteRule ^(.*) “/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-mobile.html” [L]

    or

    RewriteRule ^(.*) “/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-mobile.html.gz” [L]

    The situation right now is that there are a) too many conditions the htaccess must go through; and b) too many rejection cases then get treated by (the MUCH slower) PHP, instead of serving him the html immediately.

    Given the rise in mobile traffic (30% of our site visits are from smartphones nowadays) – the latter issue (a lack of rewrite rules for mobile) is a very painful issue for me.

    I wish I knew rewrite well enough to write an alternative, but I don’tโ€ฆ So I’m here ๐Ÿ™‚

    Thanks,

    Bira

    OK, so following my previous post, I decided to give it a try and test an .htaccess version on my test server.

    1) I incorporated raymor’s suggestions
    2) I removed the https support
    3) I removed the cookie condition test
    4) I added rule for the mobile cached page

    This is what I ended up with:

    # BEGIN WPSuperCache
    <IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    #If you serve pages from behind a proxy you may want to change 'RewriteCond %{HTTPS} on' to something more sensible
    AddDefaultCharset UTF-8
    
    RewriteCond %{REQUEST_URI} /*$
    RewriteCond %{REQUEST_URI} !//
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !=
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-).* [NC]
    RewriteCond %{HTTP:Accept-Encoding} gzip
    RewriteCond %{HTTPS} !on
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html.gz -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html.gz" [L]
    
    RewriteCond %{REQUEST_URI} /*$
    RewriteCond %{REQUEST_URI} !//
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !=
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-).* [NC]
    RewriteCond %{HTTPS} !on
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html" [L]
    
    RewriteCond %{REQUEST_URI} /*$
    RewriteCond %{REQUEST_URI} !//
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !=
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} ^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{HTTP:Accept-Encoding} gzip
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-mobile.html.gz -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-mobile.html.gz" [L]
    
    RewriteCond %{REQUEST_URI} /*$
    RewriteCond %{REQUEST_URI} !//
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !=
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} ^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-mobile.html -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-mobile.html" [L]
    </IfModule>
    
    # END WPSuperCache

    I turned on debug for WPSC and also tested response time with the default WPSC .htaccess and the revised one I did. The results are a HUGE increase in speed – especially for mobile and known users (which we treat as anonymous).

    I plan to use this on my live server, and would love to see something even better incorporated in the next WPSC version – since I have little clue what I’m doing and so may have missed some stuff that could be added or removed.

    Many thanks,

    Bira

    p.s.

    Donncha, I think you should also add “Windows Phone” to the list of mobile devices ๐Ÿ™‚

    I don’t have anything special for mobile yet, so I also removed a bunch of lines:

    # BEGIN WPSuperCache
    <IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    AddDefaultCharset UTF-8

    RewriteCond %{REQUEST_URI} !^.*[^/]$
    RewriteCond %{REQUEST_URI} !^.*//.*$
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !=
    RewriteCond %{HTTP:Accept-Encoding} gzip
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html.gz -f
    RewriteRule ^(.*) “/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html.gz” [L]

    RewriteCond %{REQUEST_URI} !^.*[^/]$
    RewriteCond %{REQUEST_URI} !^.*//.*$
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !=
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html -f
    RewriteRule ^(.*) “/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html” [L]
    </IfModule>
    # END WPSuperCache

    By the way, whay is HTTP:Profile? I couldn’t find any documentation on it.

    Also, why is it necessary to have two HTTP_USER_AGENT strings for mobile? The second, with the mobile prefixes, is quite redundant and a little out of date. It’s kind of a nightmare maintaining it.

    Just as a follow-up:

    This bit, which I took from @raymor, isn’t working well:

    RewriteCond %{REQUEST_URI} /*$
    RewriteCond %{REQUEST_URI} !//
    RewriteCond %{QUERY_STRING} !=

    If you have permalinks for posts using post_name, then links with /?p= will not redirect to /post-name/ and you’ll effectively get two cache versions of the same post.

    I reverted back these three RewriteCond to the way they were originally in the WPSC plugin, so right now that part of my .htaccess is:

    <IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /
    AddDefaultCharset UTF-8
    
    RewriteCond %{REQUEST_URI} !^.*[^/]$
    RewriteCond %{REQUEST_URI} !^.*//.*$
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !.*=.*
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|Windows\ Phone|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-).* [NC]
    RewriteCond %{HTTP:Accept-Encoding} gzip
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html.gz -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html.gz" [L]
    
    RewriteCond %{REQUEST_URI} !^.*[^/]$
    RewriteCond %{REQUEST_URI} !^.*//.*$
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !.*=.*
    RewriteCond %{HTTP:X-Wap-Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} !^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|Windows\ Phone|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{HTTP_user_agent} !^(w3c\ |w3c-|acs-|alav|alca|amoi|audi|avan|benq|bird|blac|blaz|brew|cell|cldc|cmd-|dang|doco|eric|hipt|htc_|inno|ipaq|ipod|jigs|kddi|keji|leno|lg-c|lg-d|lg-g|lge-|lg/u|maui|maxo|midp|mits|mmef|mobi|mot-|moto|mwbp|nec-|newt|noki|palm|pana|pant|phil|play|port|prox|qwap|sage|sams|sany|sch-|sec-|send|seri|sgh-|shar|sie-|siem|smal|smar|sony|sph-|symb|t-mo|teli|tim-|tosh|tsm-|upg1|upsi|vk-v|voda|wap-|wapa|wapi|wapp|wapr|webc|winw|winw|xda\ |xda-).* [NC]
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index.html" [L]
    
    RewriteCond %{REQUEST_URI} !^.*[^/]$
    RewriteCond %{REQUEST_URI} !^.*//.*$
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !.*=.*
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} ^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|Windows\ Phone|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{HTTP:Accept-Encoding} gzip
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-mobile.html.gz -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-mobile.html.gz" [L]
    
    RewriteCond %{REQUEST_URI} !^.*[^/]$
    RewriteCond %{REQUEST_URI} !^.*//.*$
    RewriteCond %{REQUEST_METHOD} !POST
    RewriteCond %{QUERY_STRING} !.*=.*
    RewriteCond %{HTTP:Profile} !^[a-z0-9\"]+ [NC]
    RewriteCond %{HTTP_USER_AGENT} ^.*(2.0\ MMP|240x320|400X240|AvantGo|BlackBerry|Blazer|Cellphone|Danger|DoCoMo|Elaine/3.0|EudoraWeb|Googlebot-Mobile|hiptop|IEMobile|KYOCERA/WX310K|LG/U990|MIDP-2.|MMEF20|MOT-V|NetFront|Newt|Nintendo\ Wii|Nitro|Nokia|Opera\ Mini|Palm|PlayStation\ Portable|portalmmm|Proxinet|ProxiNet|SHARP-TQ-GX10|SHG-i900|Small|SonyEricsson|Symbian\ OS|SymbianOS|TS21i-10|UP.Browser|UP.Link|webOS|Windows\ CE|Windows\ Phone|WinWAP|YahooSeeker/M1A1-R2D2|iPhone|iPod|Android|BlackBerry9530|LG-TU915\ Obigo|LGE\ VX|webOS|Nokia5800).* [NC]
    RewriteCond %{DOCUMENT_ROOT}/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-mobile.html -f
    RewriteRule ^(.*) "/wp-content/cache/supercache/%{SERVER_NAME}/$1/index-mobile.html" [L]

    I have to say, this has markedly improved the speed of our mobile version – and the hits ratio on the cache is much higher.

    Thanks,

    Bira

    I’m not sure what “If you have permalinks for posts using post_name, then links with /?p= will not redirect to /post-name/ and you’ll effectively get two cache versions of the same post.” means.

    Why wouldn’t they redirect? A URL with a GET parameter is not going to be cached at all, so I don’t see how you would end up with two cached pages?

    I’m not convinced your analysis of /*$ is correct though. Doesn’t that match anything, whether it ends with a / or not? I’m thinking the rule is trying to say match anything that ends with a slash, OR match ^$ I have no idea what scenario the double-slash rule is trying to match.

    I think you’re right, I applied the not operator (!) in the wrong order. It says “don’t match it if it ends with something other than a slash”, doesn’t it?

    The old pattern was:
    ! ^.*[^/]$

    ^.* = Start with any characters, or none. That’s meaningless, so we’ll remove it and we have:
    ![^/]$

    ! means “don’t match”. [^] means “any character other than a slash”. $ means “at the end”. So we have:

    Don't match any character other than a slash, at the end

    Getting rid of the negative:
    Match if it's a slash at the end, or nothing at all at the end.

    So I now think the best we can do is to just get rid of the meaningless ^.* and use:
    ![^/]$

    Does that sound right?

    @jondaley there is an option in WPSC’s advanced settings: “Donโ€™t cache pages with GET parameters.”

    I have that option UNchecked, because some of our pages actually use GET parameters.

    So yes, if the htaccess rewrite conditions are broken, a /?p= won’t redirect — and in effect will create a second cache version of the same post. Probably the GET cache is done in PHP or legacy, but nevertheless, it is a second cache served for the same post.

    (And never mind that I just don’t want two different URLs shared around, etc)

    @raymor if I understood what this specific rule is aimed at. Is it supposed to check if there’s a slash at the end of the URI, and if there ISN’T one then skip the rule?

    In other words, is a slash at the end of the URI a requirement for the rule to be used?

Viewing 15 replies - 1 through 15 (of 21 total)
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