I'm using the below code for caching of files in .htaccess
<IfModule mod_headers.c>
<filesMatch "\.(ico|jpe?g|png|gif|swf)$">
Header set Cache-Control "public"
</filesMatch>
<filesMatch "\.(css|scss)$">
Header set Cache-Control "public"
</filesMatch>
<filesMatch "\.(js)$">
Header set Cache-Control "private"
</filesMatch>
<filesMatch "\.(x?html?|xml)$">
Header set Cache-Control "private, must-revalidate"
</filesMatch>
#Header unset ETag
#Header unset Last-Modified
</IfModule>
I'm a bit confused if i should comment the #Header unset ETag and #Header unset Last-Modified or not
below is my default.conf file on apache
CacheQuickHandler off
CacheLock on
CacheLockPath /tmp/mod_cache-lock
CacheLockMaxAge 5
CacheIgnoreHeaders Set-Cookie
<Location />
CacheEnable disk
CacheHeader on
CacheDefaultExpire 600
CacheMaxExpire 86400
CacheLastModifiedFactor 0.5
ExpiresActive on
ExpiresDefault "access plus 1 week"
ExpiresByType image/x-icon "access plus 1 month"
ExpiresByType image/jpeg "access plus 1 year"
ExpiresByType image/png "access plus 1 month"
ExpiresByType text/css "access plus 1 month"
ExpiresByType text/javascript "access plus 1 month"
ExpiresByType application/ld+json "acesss plus 1 day"
# This part sets the expires for the fonts
ExpiresByType application/vnd.ms-fontobject "access plus 1 year"
ExpiresByType application/x-font-ttf "access plus 1 year"
ExpiresByType application/x-font-opentype "access plus 1 year"
ExpiresByType application/x-font-woff "access plus 1 year"
ExpiresByType image/svg+xml "access plus 1 year"
#Header merge Cache-Control public
FileETag All
</Location>
Kindly anyone help me with this confusion what should i do to achieve maximum and best compression.
Etag and Last-Modified have nothing to do with compression, they are cache'ing options. Which is OK to unset anyway because they conflict with Cache-Control, which is a better cache method. So yes, you may disable it.
If you are looking for compression, look into Apache's mod_deflate, mod_gzip or mod_brotli.