Стоит ли делать? <<Использование кеша браузера >>

# кеширование в браузере на стороне пользователя
<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault "access 7 days"
ExpiresByType application/javascript "access plus 1 year"
ExpiresByType text/javascript "access plus 1 year"
ExpiresByType text/css "access plus 1 year"
ExpiresByType text/html "access plus 7 day"
ExpiresByType text/x-javascript "access 1 year"
ExpiresByType image/gif "access plus 1 year"
ExpiresByType image/jpeg "access plus 1 year"
ExpiresByType image/png "access plus 1 year"
ExpiresByType image/jpg "access plus 1 year"
ExpiresByType image/x-icon "access 1 year"
ExpiresByType application/x-shockwave-flash "access 1 year"
</IfModule>
# Cache-Control
<ifModule mod_headers.c>
# 30 дней
<filesMatch ".(ico|pdf|flv|jpg|jpeg|png|gif|swf)$">
Header set Cache-Control "max-age=2592000, public"
</filesMatch>
 
# 30 дней
<filesMatch ".(css|js)$">
Header set Cache-Control "max-age=2592000, public"
</filesMatch>
 
# 2 дня
<filesMatch ".(xml|txt)$">
Header set Cache-Control "max-age=172800, public, must-revalidate"
</filesMatch>
 
# 1 день
<filesMatch ".(html|htm|php)$">
Header set Cache-Control "max-age=172800, private, must-revalidate"
</filesMatch>
</ifModule>