How do I diagnose my slow website?

Have you tried:

– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).

– switching to the default theme to rule out any theme-specific problems.

– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.

.

After following esmi’s advice you could:

Try enabling gzip by adding the following code above the #Begin WordPress rules in your .htaccess file (back up the original first!!)

# APACHE COMPRESSION GZIP
<IfModule mod_deflate.c>
AddOutputFilterByType DEFLATE text/html text/plain text/xml application/xml application/xhtml+xml text/css text/javascript application/javascript application/x-javascript
</IfModule>

Try adding the following code to your .htaccess file to improve the browser caching:

# BEGIN Expire headers
<ifModule mod_expires.c>
    ExpiresActive On
    ExpiresDefault "access plus 5 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 648000 seconds"
    ExpiresByType application/javascript "access plus 648000 seconds"
    ExpiresByType application/x-javascript "access plus 648000 seconds"
    ExpiresByType text/html "access plus 600 seconds"
    ExpiresByType application/xhtml+xml "access plus 600 seconds"
</ifModule>
# END Expire headers

Try converting the follwoing images to progressive jpegs:
FAILED (257.4 KB) – https://www.skyforgelabs.com/wp-content/uploads/2014/05/Circuits.jpg
FAILED (57.6 KB) – https://pbs.twimg.com/media/BnUupdaIUAAPzp6.jpg
FAILED (40.3 KB) – https://www.skyforgelabs.com/wp-content/uploads/2014/05/BitFenix-Comrade3.jpg
FAILED (13.3 KB) – https://www.skyforgelabs.com/wp-content/uploads/2014/05/ASUS-Radeon-R9-280-Strix-3GB-200×150.jpg
FAILED (11.7 KB) – https://www.skyforgelabs.com/wp-content/uploads/2014/05/ASUS-GeForce-GTX-780-Strix-6GB-200×150.jpg
FAILED (10.5 KB) – https://www.skyforgelabs.com/wp-content/uploads/2014/05/Nvidia-GeForce-GTX-Titan-Z1-200×150.jpg

I have tried a few times to ping your site. Using the Command prompt, type “ping https://www.skyforgelabs.com” – it just timed out. Should be around 25 – 50 ms. This means there is slowness with either the internet at some point on the route or with your web server, irrespective of what WordPress is doing. Maybe its a bad day today so try it a few times and see if this persists.

I have used https://www.my-ip-neighbors.com/ to find out that you share your hosting server with 720 other sites. Responsiveness of your site depends on how active those other sites are, nevertheless 720 is a lot.

I would contact your host’s support team with the problem and ask if your site can be moved to a faster server or a server with a lower contention ratio. If not, consider another host.

most likely you need to do some configuration to speed up the site.

If all of them do not work, then it can be your server hosting issue, because your site might be hosted on shared hosting, so you basically shared the server with many other websites, if one of the sites on the server using a lot of cpu, it might slow down your site as well. Contact your host, and investigate the server for u.