Tối ưu hóa website bằng cách sử dụng .htaccess Mod_Gzip và Mod_Deflate

<ifModule mod_gzip.c>
  mod_gzip_on Yes
  mod_gzip_dechunk Yes
  mod_gzip_item_include file .(html?|txt|css|js|php|pl)$
  mod_gzip_item_include handler ^cgi-script$
  mod_gzip_item_include mime ^text/.*
  mod_gzip_item_include mime ^application/x-javascript.*
  mod_gzip_item_exclude mime ^image/.*
  mod_gzip_item_exclude rspheader ^Content-Encoding:.*gzip.*
</ifModule>

# BEGIN Compress text files
<IfModule mod_deflate.c>
  <FilesMatch ".(css|js|x?html?|php)$">
    SetOutputFilter DEFLATE
  </FilesMatch>
</IfModule>
# END Compress text files
# BEGIN Expire headers
<IfModule mod_expires.c>
  ExpiresActive On
  ExpiresDefault "access plus 1 seconds"
  ExpiresByType image/x-icon "access plus 2592000 seconds"
  ExpiresByType image/jpeg "access plus 2592000 seconds"
  ExpiresByType image/png "access plus 2592000 seconds"
  ExpiresByType image/gif "access plus 2592000 seconds"
  ExpiresByType application/x-shockwave-flash "access plus 2592000 seconds"
  ExpiresByType text/css "access plus 604800 seconds"
  ExpiresByType text/javascript "access plus 216000 seconds"
  ExpiresByType application/javascript "access plus 216000 seconds"
  ExpiresByType application/x-javascript "access plus 216000 seconds"
  ExpiresByType text/html "access plus 600 seconds"
  ExpiresByType application/xhtml+xml "access plus 600 seconds"
</IfModule>
# END Expire headers
# BEGIN Cache-Control Headers
<IfModule mod_headers.c>
  <FilesMatch ".(ico|jpe?g|png|gif|swf)$">
    Header set Cache-Control "max-age=2592000, public"
  </FilesMatch>
  <FilesMatch ".(css)$">
    Header set Cache-Control "max-age=604800, public"
  </FilesMatch>
  <FilesMatch ".(js)$">
    Header set Cache-Control "max-age=216000, private"
  </FilesMatch>
  <FilesMatch ".(x?html?|php)$">
    Header set Cache-Control "max-age=600, private, must-revalidate"
  </FilesMatch>
</IfModule>
# END Cache-Control Headers
# BEGIN Turn ETags Off
<IfModule mod_headers.c>
  Header unset ETag
</IfModule>
FileETag None
# END Turn ETags Off
# BEGIN Remove Last-Modified Header
<IfModule mod_headers.c>
  Header unset Last-Modified
</IfModule>
# END Remove Last-Modified Header