Check if we have enabled mod_headers.c and mod_expires.c

First we need to check if we have enabled mod_headers.c and mod_expires.c.

sudo apache2 -l

If we don’t have it, we need to enable then

sudo a2enmod headers

Then we need to restart apache

sudo apache2 restart

Leverage browsers caching

By adding the following lines on .htaccess Leverage Browsers Caching has simply disappeared! I got the solution from http://stackoverflow.com/questions/6878427/leverage-browser-caching-how-on-apache-or-htaccess

ExpiresActive On
ExpiresByType image/gif A2592000
ExpiresByType image/jpeg A2592000
ExpiresByType image/jpg A2592000
ExpiresByType image/png A2592000
ExpiresByType image/x-icon A2592000
ExpiresByType text/css A86400
ExpiresByType text/javascript A86400
ExpiresByType application/x-shockwave-flash A2592000
#
<FilesMatch "\.(gif¦jpe?g¦png¦ico¦css¦js¦swf)$">
Header set Cache-Control "public"
</FilesMatch>

It went from a global score of 53% to 72%.
And F(1) to A(98).

Enable gzip compression

<IfModule mod_deflate.c>
 AddOutputFilterByType DEFLATE application/javascript
 AddOutputFilterByType DEFLATE application/rss+xml
 AddOutputFilterByType DEFLATE application/vnd.ms-fontobject
 AddOutputFilterByType DEFLATE application/x-font
 AddOutputFilterByType DEFLATE application/x-font-opentype
 AddOutputFilterByType DEFLATE application/x-font-otf
 AddOutputFilterByType DEFLATE application/x-font-truetype
 AddOutputFilterByType DEFLATE application/x-font-ttf
 AddOutputFilterByType DEFLATE application/x-javascript
 AddOutputFilterByType DEFLATE application/xhtml+xml
 AddOutputFilterByType DEFLATE application/xml
 AddOutputFilterByType DEFLATE font/opentype
 AddOutputFilterByType DEFLATE font/otf
 AddOutputFilterByType DEFLATE font/ttf
 AddOutputFilterByType DEFLATE image/svg+xml
 AddOutputFilterByType DEFLATE image/x-icon
 AddOutputFilterByType DEFLATE text/css
 AddOutputFilterByType DEFLATE text/html
 AddOutputFilterByType DEFLATE text/javascript
 AddOutputFilterByType DEFLATE text/plain
 # Remove browser bugs (only needed for really old browsers)
 BrowserMatch ^Mozilla/4 gzip-only-text/html
 BrowserMatch ^Mozilla/4\.0[678] no-gzip
 BrowserMatch \bMSIE !no-gzip !gzip-only-text/html
 Header append Vary User-Agent
</IfModule>
<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>

Defer parsing of JavaScript

To solve this issue I’v installed Asynchronous Javascript WordPress plugin.
It went from a score of F (19) to B (85).

 

 

 

I strongly recommend to install Google PageSpeed module.
Small tutorial https://www.digitalocean.com/community/tutorials/how-to-get-started-with-mod_pagespeed-with-apache-on-an-ubuntu-and-debian-cloud-server