WordPress.org

Weston Ruter

WordPress Performance Team

<p><em>This plugin was formerly called as “No-cache BFCache”, which admittedly was a poor jargony name and was too narrowly scoped.</em></p>
<p>This plugin enables instant back/forward navigation via the browser’s <a href="https://developer.mozilla.org/en-US/docs/Glossary/bfcache" rel="nofollow ugc">bfcache</a>. It does this by removing the <code>no-store</code> directive from the <code>Cache-Control</code> response header, which WordPress sends by default when <code>nocache_headers()</code> is called. This happens primarily when a user is logged in, but some plugins may send these “no-cache” headers such as on the Cart or Checkout pages for an e-commerce site. <strong>Upon activation, to see the effect, you must log out of WordPress and log back in again, ensuring “Remember Me” is checked.</strong> Even so, another plugin, theme or server configuration may be active which makes pages <a href="https://web.dev/articles/bfcache#optimize" rel="nofollow ugc">ineligible for bfcache</a> due to other <a href="https://developer.mozilla.org/en-US/docs/Web/API/Performance_API/Monitoring_bfcache_blocking_reasons#blocking_reasons" rel="nofollow ugc">blocking reasons</a>. Nevertheless, the removal of <code>no-store</code> will <em>still speed up back/forward navigations</em> since pages may then be served from the browser’s HTTP cache, eliminating the need to re-download the HTML from the server. This is a feature plugin to implement <a href="https://core.trac.wordpress.org/ticket/63636" rel="nofollow ugc">#63636</a> in WordPress core.</p>
<p>Blog post: <a href="https://weston.ruter.net/2025/07/23/instant-back-forward-navigations-in-wordpress/" rel="nofollow ugc">Instant Back/Forward Navigations in WordPress</a></p>
<p>The speed of page navigations in WordPress saw a big boost in 6.8 with the introduction of <a href="https://make.wordpress.org/core/2025/03/06/speculative-loading-in-6-8/" rel="nofollow ugc">Speculative Loading</a>. However, by default Speculative Loading in WordPress is not configured to enable <em>instant</em> page loads, which requires a non-conservative eagerness with the prerender mode; not all sites can even opt in to prerendering due to compatibility issues, such as with analytics, and due to concerns about sustainability with unused prerenders (e.g. increasing server load and taxing a user’s bandwidth/CPU). While Speculative Loading (i.e. the Speculation Rules API) is relatively new and currently only supported in Chromium browsers (e.g. Chrome and Edge), there is a much older web platform technology that enables prerendering <em>and</em> which is supported in all browsers: the back/forward cache (bfcache). This instant loading involves no network traffic and no CPU load, since previously visited pages are stored in memory. According to the web.dev article on <a href="https://web.dev/articles/bfcache" rel="nofollow ugc">back/forward cache</a>:</p>
<p><strong>Chrome usage data shows that 1 in 10 navigations on desktop and 1 in 5 on mobile are either back or forward. With bfcache enabled, browsers could eliminate the data transfer and time spent loading for billions of web pages every single day!</strong></p>
<p>Also learn more via the following video:</p>
<p><iframe loading="lazy" title="Debugging bfcache, make your page load instantly #DevToolsTips" width="750" height="422" src="https://www.youtube.com/embed/Y2IVv5KnrmI?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></p>
<p>Normally, WordPress sends a <code>Cache-Control</code> header with the <code>no-store</code> directive when a user is logged in. This has the effect of <a href="https://web.dev/articles/bfcache#minimize-no-store" rel="nofollow ugc">breaking the browser’s bfcache</a>, which means that navigating back or forward in the browser requires the pages to be re-fetched from the server and for any JavaScript on the page to re-execute. The result can be a sluggish navigation experience not only when navigating around the WP Admin (see <a href="https://github.com/Automattic/jetpack/pull/44322#:~:text=page%20load%20is%3A-,Without%20bfcache,-With%20bfcache" rel="nofollow ugc">Jetpack demo video</a> and demo video below) but also when navigating around the frontend of a site. Furthermore, the lack of bfcache can cause data loss when data has been entered via a JavaScript-built UI since this state is lost when a page is not restored via bfcache (see <a href="https://github.com/woocommerce/woocommerce/pull/58445#issuecomment-3014404754" rel="nofollow ugc">WooCommerce demo video</a> and demo video below).</p>
<p>The reason why the <code>no-store</code> directive was added in the first place was due to a privacy concern where an authenticated user may log out of WordPress, only for another person to access the computer and click the back button to view the contents of the authenticated page loaded from bfcache or the HTTP cache. (See <a href="https://core.trac.wordpress.org/ticket/21938" rel="nofollow ugc">#21938</a>.) In practice this issue depends on the user being on a shared computer who didn’t exit the browser, and it requires the malicious user to act soon before the page is evicted from bfcache (e.g. Chrome as a <a href="https://developer.chrome.com/docs/web-platform/bfcache-ccns#:~:text=The%20bfcache%20timeout%20for%20Cache%2DControl%3A%20no%2Dstore%20pages%20is%20also%20reduced%20to%203%20minutes%20(from%2010%20minutes%20used%20for%20pages%20which%20don%27t%20use%20Cache%2DControl%3A%20no%2Dstore)%20to%20further%20reduce%20risk." rel="nofollow ugc">10-minute timeout</a>).</p>
<p>To address this privacy concern, a safeguard is in place to protect against restoring pages from bfcache and the HTTP cache after the user has logged out:</p>
<p>When authenticating to WordPress, a “bfcache session token” cookie is set along with the other authentication cookies. This cookie is not HTTP-only so that it can be read in JavaScript; it is a random string not used for any other purpose. When an authenticated page is served, this bfcache session token is included in the HTML as well as a script which reads the value of this cookie. When a user navigates away from the page and then navigates back to it, a script on the page checks if the current session token in the cookie matches the initial session token sent with the page. If they do not match (e.g. because the user has logged out or another user has logged in), then the contents of the page are cleared and the page is reloaded so that the contents are not available.</p>
<p>Since JavaScript is required to invalidate cached pages, the login form is extended to pass along whether scripting is enabled. Only when JS is enabled will the <code>no-store</code> directive be omitted from the <code>Cache-Control</code> response header. This ensures that users with JavaScript turned off will retain the privacy protection after logging out. Lastly, <code>no-store</code> is also only omitted if the user checked the “Remember Me” checkbox on the login form. Since it is highly unlikely a user on a shared computer would have checked this checkbox, this provides yet an additional safeguard (which may in the end prove excessive). A ✨ emoji is displayed next to the checkbox in a button that opens a popover that promotes the capability. If you want to opt out of this opt-in (and the sparkle) so that all logged-in users get bfcache, you can use the <code>nocache_bfcache_use_remember_me_as_opt_in</code> filter which you can use in a custom plugin or your theme:</p>
<pre>add_filter( 'nocache_bfcache_use_remember_me_as_opt_in', '__return_false' );</pre>
<p>When this plugin strips out the <code>no-store</code> directive, it also ensures that the <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Cache-Control#private" rel="nofollow ugc"><code>private</code> directive</a> is sent in its place: “The <code>private</code> response directive indicates that the response can be stored only in a private cache (e.g., local caches in browsers).” WordPress is already sending <code>private</code> as of <a href="https://core.trac.wordpress.org/ticket/57627" rel="nofollow ugc">#57627</a>. This directive ensures that proxies do not cache authenticated pages. In addition to ensuring <code>private</code> is present, this plugin also adds <code>no-cache</code>, <code>max-age=0</code>, and <code>must-revalidate</code> while ensuring <code>public</code> is removed, all to further guard against any misconfigured proxy from caching the private response.</p>
<h4>Demo: Navigating the WordPress Admin</h4>
<p>Without bfcache:</p>
<p><iframe loading="lazy" title="Navigating the WordPress Admin without Back/forward Cache (bfcache)" width="750" height="563" src="https://www.youtube.com/embed/Cz-_L6q9ZRc?start=22&feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></p>
<p>With bfcache:</p>
<p><iframe loading="lazy" title="Navigating the WordPress Admin with Back/forward Cache (bfcache)" width="750" height="563" src="https://www.youtube.com/embed/z4dILiwe0Rk?start=27&feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></p>
<h4>Demo: Navigating the WordPress Frontend</h4>
<p><strong>Without bfcache:</strong> The drafted BuddyPress activity update is lost when navigating away from the page before submitting. The activity feed and Tweet have to be reconstructed with each back/forward navigation.</p>
<p><iframe loading="lazy" title="Navigating the WordPress Frontend without Back/forward Cache (bfcache)" width="750" height="563" src="https://www.youtube.com/embed/Ko1w_SRlCig?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></p>
<p><strong>With bfcache:</strong> The drafted BuddyPress activity update is preserved when navigating away from the page without submitting. The activity feed and Tweet do not have to be reconstructed when navigating to previously visited pages via the back/forward buttons.</p>
<p><iframe loading="lazy" title="Navigating the WordPress Frontend with Back/forward Cache (bfcache)" width="750" height="563" src="https://www.youtube.com/embed/bzGm6LcHHAs?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></p>


Instant Back/Forward


This is now a "must install" plugin for me on every site I work on. It's absolutely magical.


Magical

Enables back/forward cache (bfcache) for instant history navigations even when “nocache” headers are sent, such as when a user is logged in.

Konstantin Kovshenin

<p>Surge generates and serves static HTML files for your WordPress site, causing quicker requests, faster load times and a shorter time to first byte (TTFB).</p>
<p>Surge does not require configuration, and has no options. It works out of the box on any well-configured hosting platform. Cached files are stored on disk, and automatically invalidated when your site is updated.</p>
<p>In various load tests, Surge has shown to easily handle 1000-2500 requests per second at 100 concurrent, on a small single-core server with only 1 GB of RAM. That’s over 70 times faster than a stock WordPress install.</p>


Surge

This plugin does one thing: generate and serve static HTML files. And it does that one thing perfectly.

Focused

It really helps to improve speed A LOT without any hassle with options.

Great job!

I just installed Surge in all my sites. After cancelling the payment option I was using, I was looking for a simple and easy to install option. And Surge is exactly this. Forget about complex configuration options (where you're at risk of crashing your site, talking from my own experience!), just install and forget!. 

I don't know if it's really the fastest option if you're an optimization expert that know exactly what to touch but it's the fastest option for me, no doubt about it

Hassle-free option - Works out-of-the-box


This plugin works! Install, activate, and check WP_CACHE value and boom - your site is fast!One nice feature that is happening under the hood is caching of specific REST API requests. That makes, for example, dynamic parts of the site with javascript filtering blazingly fast.


Just works!


Over the years, I've looked at all the top caching plugins, and never found one that I liked. They were either too complex, too finicky, or tried to do too many things.



Surge just works, and it works great.



Update: I ran some basic performance testing of the same sample content with and without Surge activated.Surge increased my Requests per second by a factor of 21x and reduced my time per request by a factor of 25x.



Beyond that, Konstantin has been amazing as far as support goes for a free plugin. Besides addressing issues and requests, he's gone above-and-beyond at helping work through issues, to the point of looking at where we are using Surge and making additional configuration recommendations. If it were possible to give 6 stars, I would!


Finally a Caching Plugin I can get behind!

Surge is a very simple and fast page caching plugin for WordPress.

Instant Back/Forward vs Surge