abhishek

<h4>1. Add an Expires Header</h4>
Web pages are becoming increasingly complex with more scripts, style sheets, images, and Flash on them. A first-time visit to a page may require several HTTP requests to load all the components. By using Expires headers these components become cacheable, which avoids unnecessary HTTP requests on subsequent page views. Expires headers are most often associated with images, but they can and should be used on all page components including scripts, style sheets, and Flash.
Using WP Avoid Slow reduces number of HTTP requests affecting the page load performance.
<h4>2. Configure Etags</h4>
Entity tags (ETags) are a mechanism web servers and the browser use to determine whether a component in the browser’s cache matches one on the origin server. Since ETags are typically constructed using attributes that make them unique to a specific server hosting a site, the tags will not match when a browser gets the original component from one server and later tries to validate that component on a different server.
WP Avoid Slow Configure Etags helping browsers to validate the component !!
<h4>Please Note</h4>
Performance can be measured via Yslow. <a href="http://developer.yahoo.com/yslow/" rel="nofollow ugc">Read More</a> about Yslow .

WP Avoid Slow

WP Avoid Slow - Add .htaccess tricks to boost your WP Blog Speed.

Stefano Lissa

Hyper Cache is a cache plugin specifically written to get the maximum speed for your WordPress blog.
It can be used in low resources hosting as well on high end servers.
Hyper Cache is purely PHP and works on every blog: no complex configurations are needed and when you deactivate it no stale settings are left around.
NOTE
Mobile detection server side and serving different content to mobile and desktop device is now obsolete. 
Every modern WP theme deals with mobile/desktop contexts using the media queries, progressive enhancement and so on. 
So I don’t see the need to keep the mobile/desktop cache separation and all the overhead in the plugin. The feature will be removed as version 3.5.
Short list of features:
<ul>
<li>Mobile aware: double cache for desktop and mobile site versions</li>
<li>HTTPS ready</li>
<li>Mobile theme switch option: change the theme on mobile device detection</li>
<li>Able to serve expired pages to bots to increase the perceived blog speed by bots</li>
<li>Manages compression even on the fly for non cached pages</li>
<li>Lots of configurable bypasses: matching cookies, matching urls, user agents, …</li>
<li>Comments aware: is able to serve cached pages even to visitors who commented the blog (perfect for blog with great readers paritipation)</li>
<li>Cache folder can be moved outside your blog space to exclude it from backups</li>
<li>Controls over cache cleaning on blog events (post edited, comments, …)</li>
<li>Autoclean to controls the cache used disk space</li>
<li>CDN support</li>
<li>Other special options</li>
<li>Response header signature to check the working status</li>
<li>bbPress specific integration</li>
</ul>
More can be read on the <a href="https://www.satollo.net/plugins/hyper-cache" rel="nofollow ugc">Hyper Cache official page</a>.
You can further optimize the blog installing <a href="https://wordpress.org/plugins/autoptimize/" rel="ugc">Autoptimize</a> which cleans up the HTML, minifies and concatenates CSS and JavaScript.
Other plugins by Stefano Lissa:
<ul>
<li><a href="https://www.thenewsletterplugin.com" rel="nofollow ugc">Newsletter</a></li>
<li><a href="https://www.satollo.net/plugins/header-footer" rel="nofollow ugc">Header and Footer</a></li>
<li><a href="https://www.satollo.net/plugins/include-me" rel="nofollow ugc">Include Me</a></li>
<li><a href="http://www.satollo.net/plugins/thumbnails" rel="nofollow ugc">Thumbnails</a></li>
</ul>

Hyper Cache

Super fast, not overly complicated but with enough settings to customize for any set up. Most importantly: works like a charm on VPS!

THE caching plugin

Really well coded plugin, improved pagespeed for google from 86 to 93 compared to lightspeed cache. Simple and reliable.

Simply faster

Hyper Cache is a performant and easy to configure cache system for WordPress.

WP Avoid Slow vs Hyper Cache