Title: Speed Booster Pack ⚡ PageSpeed Optimization Suite
Author: Optimocha
Published: May 20, 2014
Last modified: May 8, 2026
---
Search plugins
# Speed Booster Pack ⚡ PageSpeed Optimization Suite
By [Optimocha](https://profiles.wordpress.org/optimocha/)
[Download](https://downloads.wordpress.org/plugin/speed-booster-pack.4.5.9.1.zip)
* [Details](https://wordpress.org/plugins/speed-booster-pack/#description)
* [Reviews](https://wordpress.org/plugins/speed-booster-pack/#reviews)
* [Installation](https://wordpress.org/plugins/speed-booster-pack/#installation)
* [Development](https://wordpress.org/plugins/speed-booster-pack/#developers)
[Support](https://wordpress.org/support/plugin/speed-booster-pack/)
## Description
Improving your site’s speed will get you a better score on major speed testing services
such as [Google PageSpeed](https://pagespeed.web.dev/), [GTmetrix](https://gtmetrix.com/),
[Pingdom](https://tools.pingdom.com/), [WebPageTest](https://www.webpagetest.org/)
and will also improve your overall site’s usability. This will help Google and other
search engines to rank your site higher in search results thus sending more traffic.
**Speed Booster Pack** is maintained & operated by **[Optimocha](https://optimocha.com/)**,
a company that offers special speed optimization services filled with people who
_obsess_ about speed!
### Benefits of Speed Booster Pack
Each second of delay can cause up to 20% loss in conversion rates ([source: Google](https://web.dev/articles/why-speed-matters)).“
Conversion” means _converting_ visitors to something more than a “visitor”: leads,
customers, subscribers, followers… you name it.
You might lose more than half of your visitors if your website loads **slower than
three seconds**! ([source: Google again](https://www.blog.google/products/admanager/the-need-for-mobile-speed/))
More than half of your potential customers might get back to the search results
page and navigate to your competitor. This is a huge problem, and it’s hugely overlooked
among other SEO-related concerns. People don’t realize how important speed is, in
the eyes of search engines.
That’s where Speed Booster Pack comes in: With its ever-evolving codebase, Speed
Booster Pack aims to increase your site performance, page load times and PageSpeed(
Lighthouse) scores! Optimocha, the company behind Speed Booster Pack, has a team
with a pathological obsession for speed; so you can be sure that your site will
be in good hands.
### How to optimize PageSpeed Core Web Vitals metrics with Speed Booster Pack
With our huge set of features, of course!
⭐ **Core Web Vitals**: Speed Booster Pack is made to improve your [Largest Contentful Paint (LCP)](https://web.dev/articles/lcp),
[Interaction to Next Paint (INP)](https://web.dev/articles/inp) and [Cumulative Layout Shift (CLS)](https://web.dev/articles/cls)
metrics, which are also known together as [Core Web Vitals](https://web.dev/articles/vitals).(
The [First Input Delay (FID)](https://web.dev/articles/fid) metric is being replaced
by INP, but Speed Booster Pack also improves FID and its lab counterpart, [Total Blocking Time (TBT)](https://web.dev/articles/tbt/).)
With the right configuration, you can get your PageSpeed scores higher than ever!
⭐ **Caching**: Cache your pages into static HTML files, reduce database queries,
get a faster website almost immediately. What’s not to love about caching? ⭐ **
Optimize Google Fonts**: Did you know that there are better ways to load Google
fonts? We like to brag about finding one of the best ways. ⭐ **Lazy Load**: It’s
a disheartening issue that page speed tools encourage laziness… Just kidding, we
love being lazy. And search engines will love your pages when you enable lazy loading
for images, videos and iframes (except for the above-the-fold stuff, trust us).
⭐ **Optimize JavaScript**: You know that totally-not-cryptic “Remove Render-Blocking
JavaScript” recommendation? Speed Booster Pack can help defer them all until after
the whole HTML is rendered, or at least move all scripts to footer. Works like a
charm. ⭐ **Optimize CSS**: Who needs all those different CSS files when you can
inline them all into your page source? Especially when your CSS footprint is so
small? Moreover, you can use the “[Critical CSS](https://web.dev/articles/extract-critical-css)”
feature to essentially lazy-load all your CSS except for the CSS for above-the-fold.
⭐ **Preload Assets**: Have some fonts that load in all your pages, or a script,
or some CSS files? Preloading them will help modern browsers serve your pages way
faster! ⭐ **WooCommerce Optimizations**: Disable cart fragments, change Action
Scheduler’s retention period, disable things like WooCommerce Marketing and WooCommerce
Analytics… and more to come! ⭐ **Dequeue Core Scripts/Styles**: Dashicons, jQuery
Migrate, emoji script, post embed script… If you don’t need them, you can now choose
to prevent them from loading in the first place… which can get you to the first
place on your Google SERPs. ⭐ **Localize Google Analytics & Tag Manager**: Tracker
scripts aren’t the worst things that’ll slow your pages down, but they cause the
most “recommendations”. Localizing Google Analytics and/or Google Tag Manager is
a good idea to speed up your website then, right? Right? ⭐ **Enable CDN**: Integrate
your content delivery network to your website by rewriting all static asset URLs
with your CDN domain. ⭐ **Cloudflare & Sucuri Integration**: Connect to your Cloudflare
or Sucuri account so you can clear your cache every time your page cache is cleared.
⭐ **Declutter HEAD**: Do you think all that useless junk in your should be gone?
Us too! You know what they say: A clear works faster. ⭐ **Other Features**: Minify
HTML, enable instant.page, trim query strings, disable self pingbacks, optimize
the Heartbeat API, set a limit for post revisions, change autosave interval… Did
we forget anything?
We’re constantly working on new features so stay tuned for more and more on every
major release!
For complete usage instructions, you can visit the [Speed Booster Pack documentation](https://speedboosterpack.com/)
page.
### Translators are always welcome & always rewarded!
More than half of WordPress users don’t speak English, and missing out so much!
That’s why Optimocha is always looking for volunteers to [translate Speed Booster Pack](https://translate.wordpress.org/projects/wp-plugins/speed-booster-pack/)
so more and more people can benefit from its goodness. Oh, and we reward the people
who help us! Reach out to us to become a translation editor in your language, and
get rewarded with special discount codes of our services!
### About [Optimocha](https://optimocha.com/) Speed Optimization Services
Speed optimization plugins might do a great job at optimizing your website and increasing
your PageSpeed scores, but even they can’t perform well on websites with poor setups.
There are lots of factors to think about when it comes to web performance optimization.
That’s where we, as Optimocha, come in: We log in to your website; create a specialized
optimization report considering all your plugins, your theme settings, your hosting
environment and your whole content; then we get our hands dirty to get your website
as fast as possible. To learn more about our services and get in touch with us,
here are some links:
* [One-time speed optimization services](https://optimocha.com/speed-optimization-for-wordpress/)
* [Monthly speed optimization & maintenance services](https://optimocha.com/speed-optimization-for-wordpress/#ongoing-optimization)
* [Contact Optimocha](https://optimocha.com/contact/)
### Disclaimer
Even though the plugin works perfectly well on most WordPress websites, it’s not
perfect. We just need to make sure that we’re on the same page: This plugin, no
matter how hard we work on it, might have bugs in it and your site has an off chance
to have issues with the plugin. It doesn’t do anything permanent to your pages’
source codes, so deactivating the plugin and clearing your browser & server caches
will solve any kind of issue it might cause. Other than that, we won’t be able to
take responsibility if something else clashes with Speed Booster Pack.
## Screenshots
* [[
* Plugin options page
* [[
* [[
* [[
## Installation
1. Download the plugin (.zip file) on your hard drive.
2. Unzip the zip file contents.
3. Upload the `speed-booster-pack` folder to the `/wp-content/plugins/` directory.
4. Activate the plugin through the ‘Plugins’ menu in WordPress.
5. A new sub menu item `Speed Booster` will appear in your main Settings menu.
## FAQ
For complete usage instructions, you can visit the [Speed Booster Pack documentation](https://speedboosterpack.com/)
page.
### I like your plugin, how do I thank you?
We don’t accept any donations, if that’s what you’re asking! 😊 But we do like to
have our users [review the plugin](https://wordpress.org/support/plugin/speed-booster-pack/reviews/#new-post)
with a fair star rating. And we always appreciate you recommending our plugin to
other people!
### I have a bug report!
We love you already! ❤ Please issue your bug report [over GitHub](https://github.com/optimocha/speed-booster-pack/)
so we can get started squashing it. **If it’s a legitimate bug, you’ll be awarded
with discount coupons to our services!**
### This plugin broke my site!
It’s possible that the theme or your plugins might be using some old code that isn’t
compatible with Speed Booster Pack’s code. If that’s the case, try disabling some
features in the Advanced tab. If that doesn’t work, try deactivating the plugin
and clear your browser & server caches. If that does the trick, reach out to us
so we can help you. If the site is _still_ broken, though, there’s obviously another
reason for your site breaking because everything Speed Booster Pack does, it does
it on-the-fly. Deactivating the plugin (and clearing your caches) will make everything
go away.
### I need more than Speed Booster Pack!
Our main business is special speed optimization services, tailored for every website
we work on. [On our website](https://optimocha.com/), you can review our speed optimization
packages and contact us.
### How often do you update the plugin?
All the time! We’re always looking for new ways to get this plugin to a better state:
We code new features, we fix existing bugs, and we try our best to make Speed Booster
Pack more and more popular. And we always appreciate a helping hand: If you’ve got
a new feature to offer, [you can suggest it over here](https://optimocha.com/contact/).
If we eventually make it happen and/or you help us make it happen, you’ll be rewarded
with handsome discount coupons or even free speed optimization services!
## Reviews
### [Thanks for the support, the plugin is very fast.](https://wordpress.org/support/topic/thanks-for-the-support-the-plugin-is-very-fast/)
[Phuong Tong](https://profiles.wordpress.org/tvphuong41/) January 31, 2026 1 reply
Thanks for the support, the plugin is very fast.
### [Muito bom](https://wordpress.org/support/topic/muito-bom-1968/)
[luizcmarcondes](https://profiles.wordpress.org/luizcmarcondes/) August 9, 2025
recomendo a todos
### [Really good](https://wordpress.org/support/topic/really-good-548/)
[dspplug](https://profiles.wordpress.org/dspplug/) January 27, 2025 1 reply
This and Jetpack boost are all you need. Finding a good way to cause headers to
expire and force gzip is just about everything that can be done. I already don’t
like that I have to use so many plug-ins; but I sometimes forget code revisions
I write myself and it’s time-intensive. This is a 6-star plug-in!
### [Fantastatic plugin](https://wordpress.org/support/topic/fantastatic-plugin/)
[orpheus55](https://profiles.wordpress.org/orpheus55/) September 24, 2024 1 reply
This one is really great. Enough options, big advantages. Do not want to miss it
any longer. And, incredibly enough, it‘s free. Thank you over there at SBP!
### [Must have](https://wordpress.org/support/topic/must-have-709/)
[Alex Diller](https://profiles.wordpress.org/thedelta/) July 15, 2024 1 reply
Great free plugin. Easy to setup and if there is an issue the devs respond fast
and fix it quickly. Thanks for this free plugin, appreciate the work and support
❤️
### [Great speed boost](https://wordpress.org/support/topic/great-speed-boost-2/)
[izakvdm](https://profiles.wordpress.org/izakvdm/) May 11, 2024 1 reply
I used 3 other well known cache plugins and I couldn’t get my site above 75 on mobile.
With Speed Boost Pack my mobile is now 98 and desktop 99 without any errors.
[ Read all 186 reviews ](https://wordpress.org/support/plugin/speed-booster-pack/reviews/)
## Contributors & Developers
“Speed Booster Pack ⚡ PageSpeed Optimization Suite” is open source software. The
following people have contributed to this plugin.
Contributors
* [ Optimocha ](https://profiles.wordpress.org/optimocha/)
* [ Speed Booster Pack ](https://profiles.wordpress.org/speedboosterpack/)
“Speed Booster Pack ⚡ PageSpeed Optimization Suite” has been translated into 14
locales. Thank you to [the translators](https://translate.wordpress.org/projects/wp-plugins/speed-booster-pack/contributors)
for their contributions.
[Translate “Speed Booster Pack ⚡ PageSpeed Optimization Suite” into your language.](https://translate.wordpress.org/projects/wp-plugins/speed-booster-pack)
### Interested in development?
[Browse the code](https://plugins.trac.wordpress.org/browser/speed-booster-pack/),
check out the [SVN repository](https://plugins.svn.wordpress.org/speed-booster-pack/),
or subscribe to the [development log](https://plugins.trac.wordpress.org/log/speed-booster-pack/)
by [RSS](https://plugins.trac.wordpress.org/log/speed-booster-pack/?limit=100&mode=stop_on_copy&format=rss).
## Changelog
#### 4.5.9.1
_Release Date: 08 May 2026_
* **Fixed**: The “Function _load_textdomain_just_in_time was called incorrectly”
error is now fixed.
#### 4.5.9
_Release Date: 10 October 2025_
* **Improved**: Checked and ensured the plugin is compatible with the latest versions
of WordPress & PHP and several popular plugins. [Contact us](https://optimocha.com/contact/)
if you have ideas to improve the plugin… because we’re working on version 5!
#### 4.5.8.1
_Release Date: 13 February 2024_
* **Fixed**: The update on the cache warmup feature broke things, so it’s reverted.
#### 4.5.8
_Release Date: 13 February 2024_
* **Improved**: Code refactoring, cleanups and readability improvements.
* **Removed**: The class-sbp-custom-code-manager.php file is unused and deleted.
* **Fixed**: Small update (for newer versions of PHP) in the SimpleHtmlDom library.
* **Fixed**: Small update (for newer versions of PHP) in the Codestar Framework.
* **Fixed**: Lazy loader’s inlined script is now loading before the lazyload.js
file.
* **Fixed**: Lazy loader has a placeholder image that doesn’t cause CLS issues.
* **Fixed**: Lazy loader doesn’t add a `data-srcset` attribute as it’s not necessary.
* **Fixed**: Cloudflare integration doesn’t cause fatal errors if cURL isn’t installed.
* **Fixed**: The cache warmup feature now clears the whole cache before, well,
warming up the cache.
#### 4.5.7
_Release Date: 20 October 2023_
* **Improved**: Tested with the latest WordPress version.
* **Removed**: Deleted unnecessary HTTP header addition in the advanced-cache.php
file.
* **Fixed**: A small issue in the “set image dimensions” feature is fixed.
#### 4.5.6
_Release Date: 19 January 2023_
* **Improved**: The introductory text in the SBP dashboard is shorter and less
scary now.
* **Removed**: Deleted the migrator class and the deactivation survey.
* **Fixed**: A small issue in the lazy load feature is fixed.
* **Updated**: Updated default .htaccess content based on HTML5 Boilerplate v6.0.0.
* **Updated**: Updated Codestar Framework to v2.2.9.
#### 4.5.5
_Release Date: 05 June 2022_
* **Improved**: Refactoring of some old code.
* **Fixed**: Various bug fixes.
#### 4.5.4
_Release Date: 27 May 2022_
* **Improved**: Some code refactoring.
* **Improved**: Lazy loading should perform even better now.
* **Fixed**: Semi-important issue regarding an unintentional redirect.
* **Fixed**: Some smaller, less-annoying bugs.
#### 4.5.3
_Release Date: 18 May 2022_
* **Fixed**: JSON outputs had that extra HTML comment which broke more than a few
things…
* **Fixed**: On rare occasions, the cachefile was saved completely empty.
* **Removed**: New users won’t see an introduction popup because it’s not the most
pleasant way to greet a new user. Instead, we’re going to update our dashboard
text in the next version.
#### 4.5.2
_Release Date: 14 May 2022_
* **NEW**: New option called “Dequeue global styles”.
* **Improved**: Lots of refactoring to the `class-sbp-tweaks.php` file.
* **Improved**: Removed unused helper functions.
* **Fixed**: Full site editing related bug squashed.
* **Fixed**: HTML minifier did a lot more damage than it did good, so we replaced
it with an external class from github.com/mrclay/minify.
* **Fixed**: Hooked our public-faced features to `init` instead of `template_redirect`
so it’s more compatible with other plugins.
* **Fixed**: Reverted the `shutdown` hook as it did more damage than good.
* **Fixed**: The PHP version warning (shown to PHP 5.x users) is now dismissible.
#### 4.5.1.1
_Release Date: 24 April 2022_
* **Fixed**: One more (tiny) fix to the deactivation survey.
#### 4.5.1
_Release Date: 18 April 2022_
* **NEW**: Simple warning notice about PHP version (when it’s below 7.0).
* **Fixed**: Deactivation survey didn’t show the details textarea.
* **Fixed**: LiteSpeed cache cached logged-in users even when the setting was turned
off.
#### 4.5.0
_Release Date: 14 April 2022_
* **NEW – WooCommerce optimizations**: The “Special” tab is replaced with the “
WooCommerce” tab with SEVEN WC-related optimizations, four of them brand new!
* **NEW – Deactivation survey**: An optional survey added to the “Deactivate” button
to get feedback from users leaving us, so we can improve SBP even further.
* **Improved**: Added a shutdown hook so the plugin plays better with other plugins(
like Really Simple SSL).
* **Improved**: A few `if`s here and there to improve the performance of the plugin.
* **Improved**: LiteSpeed cache users can now exclude cookies!
* **Improved**: Improvements with the lazy load feature – GetWid videos and videos
using `mediaelements.js` are now lazy loaded properly.
* **Improved**: The placeholder image of lazy loaded images is also improved, using
a transparent pixel instead of a gray one.
* **Improved**: Improvements with the method which adds the `WP_CACHE` constant
to the `wp-config.php` file.
* **Updated**: Updated Codestar Framework to v2.2.6.
* **Updated**: Updated lazyload.js to v17.7.0.
#### 4.4.1.1
_Release Date: 12 March 2022_
* **Improved**: Speed Booster Pack’s wp-admin CSS file got a bit smaller.
* **Improved**: Better onboarding with titles.
* **Improved**: The CDN feature is now enabled with a toggle.
* **Improved**: Code improvements in the “LiteSpeed cache” feature.
* **Fixed**: Fixed an issue when there were no fonts found inside page sources.
* **Fixed**: The “set image dimensions” feature now correctly detects image URLs
that start with `http://` while the site URL starts with `https://` (and vice
versa).
* **Updated**: Updated Codestar Framework to v2.2.6.
* **Updated**: Updated intro.js to v5.0.0.
* **Removed**: Custom Code Manager is now removed. Users who added custom codes
will get a notice to copy their code to somewhere else.
#### 4.4.0
_Release Date: 05 February 2022_
* **NEW – LiteSpeed Caching**: This experimental new feature connects to your LiteSpeed
server and use LiteSpeed’s caching structure. Since it’s really new, be sure
to test thoroughly and [kindly report any bugs to our GitHub page](https://github.com/optimocha/speed-booster-pack/issues/).
* **Improved**: Better page caching by refactoring some of the code.
* **Fixed**: Fixed onboarding for non-English users.
* **Fixed**: Fixed a small issue with per-post/page critical CSS settings.
* **Updated**: Updated Codestar Framework to v2.2.5.
* **Removed**: The Advisor tab is now removed because the Site Health screen in
WordPress core will include a Performance tab with the same functionality (in
the future).
#### 4.3.4.2
_Release Date: 15 November 2021_
* **Fixed**: Tiny bug in the cache delivery system.
#### 4.3.4
_Release Date: 13 November 2021_
* **Improved**: Added an onboarding modal to the settings page for first-time users.
* **Fixed**: Fixed some bugs in the advanced-cache.php generation process.
* **Fixed**: Lots of improvements/fixes to the cache warmup process.
#### 4.3.3.1
_Release Date: 16 October 2021_
Had to release a tiny hotfix because we _forgot_ to change the version. And while
we’re at it, we edited the readme a bit.
#### 4.3.3
_Release Date: 16 October 2021_
* **Improved**: The Speed Booster Pack metabox in post/page edit screens is now
shoed only to admins.
* **Improved**: The settings page looks more clean now.
* **Improved**: Added `data-noptimize` and `data-sbp-skip` to the default exclude
lists of the JS optimizer.
* **Updated**: lazyload.js was updated to version 17.5.0.
* **Removed**: The PageSpeed Tricker feature is removed.
* **Fixed**: Corrected the behavior of SBP when another plugin’s page caching was
active _and_ SBP’s page caching weren’t.
* **Patched**: A security issue with the database optimizer was patched.
#### 4.3.2
_Release Date: 01 October 2021_
* **NEW**: You can now disable Speed Booster Pack for certain user roles.
* **NEW**: You can now add `` tags for featured images.
* **Improved**: Advisor works better now!
#### 4.3.1
_Release Date: 11 September 2021_
* **Improved**: Better handling of notices.
* **Improved**: Database engine converter works slightly better now.
* **Fixed**: Small bug in Google font optimizer.
* **Fixed**: Post revisions setting wasn’t working in some cases.
* **Updated**: Codestar options framework is updated to its latest version.
* **Removed**: “Dequeue Jetpack’s devicepx script” is gone.
#### 4.3.0
_Release Date: 29 August 2021_
* **NEW – Advisor**: This new feature will recommend things like upgrading your
PHP version, HTTP protocol and more, in the future.
* **NEW – Set missing image dimensions**: SBP can now set missing `width` and `
height` parameters for `` tags automatically.
* **NEW – Content-specific Critical CSS**: Allows you to set critical CSS rules
for each post, page or other custom post types.
* **NEW – Content-specific Optimize JS**: Allows you to set JS optimization rules
for each post, page or other custom post types.
* **Improved**: Google Fonts optimizer now supports /css2 URLs!
* **Improved**: Better handling of the wp-config.php file.
* **Improved**: Better handling of Cloudflare credentials.
* **Improved**: You can now exclude CSS files from being deferred while critical
CSS is enabled.
* **Fixed**: An immutable notice shows that the PageSpeed Tricker feature is enabled.
* **Fixed**: Email newsletter nag shows one day after SBP is installed, instead
of immediately on first install.
* **Fixed**: Fixed a harmless error in the cache warmup process.
#### 4.2.1 & 4.2.2
_Release Date: 03 July 2021_
* **Fixed**: Tiny hotfix for a bug that causes an error during the plugin update(
but completely harmless).
#### 4.2.0
_Release Date: 02 July 2021_
* **NEW – Database Engine Converter Tool**: Lets you convert database table engines
from MyISAM to InnoDB.
* **NEW – Content-specific preloads**: Allows you to set `` rules for each post, page or other custom post types.
* **NEW – `Dequeue comment-reply.js`**: Dequeues the comment reply script.
* **Improved**: More Cloudflare settings, included their brand new Automatic Platform
Optimization (APO)!
* **Improved**: Notifications of Speed Booster Pack are less annoying now, mostly
moved to the Speed Booster Pack settings page.
* **Improved**: JS optimization settings are improved by splitting “Move JS to
footer” and “Defer JavaScript” features into two different settings. Make sure
your JS optimization settings are still working after this update!
* **Improved**: The CSS optimization PHP class is rewritten. User feedback welcome
after this update! 🙂
* **Improved**: Caching feature is greatly improved, both in terms of performance
and code quality. We even squashed a few tiny bugs!
* **Improved**: You can now exclude cookies from caching.
* **Improved**: CriticalCSS options are extended to include conditional tags for
WooCommerce products (`is_product()`) and product categories (`is_product_category()`).
Also now the admin bar CSS is always excluded from being deferred.
* **Improved**: Lazy loader is greatly improved.
* **Fixed**: Minor security flaws (“minor” because only administrators are able
to break things in previous 4.x versions).
* **Fixed**: A conflict between SBP and All in One SEO Pack is fixed.
* **Fixed**: A conflict between SBP and Elementor is fixed.
* **Fixed**: A tiny bug is fixed in the autosave setting.
* **Updated**: The library of the options framework is updated.
#### 4.1.3
_Release Date: 23 March 2021_
* **Improved**: Cloudflare integration improvements.
* **Improved**: Hosting compatibility improvements.
* **Improved**: Settings panel improvements.
* **Fixed**: HTML encoding/decoding issues with the SimpleHtmlDom library.
* **Fixed**: Changed the placeholder image data URI when lazy loading is active(
used to show a broken image icon).
* **Fixed**: Kinsta compatibility improvements caused some PHP warnings – not anymore.
#### 4.1.1
_Release Date: 28 January 2021_
* **Improved**: Wrote better descriptions for certain settings.
* **Fixed**: Tiny warning on Cloudflare settings.
* **Fixed**: Inline CSS wasn’t able to parse some `url()` values, until now.
* **Fixed**: Cache warmup now handles pages with a better working process.
* **Fixed**: SBP won’t try to _optimize_ files that are generated on-the-fly by
WordPress (like robots.txt or the RSS feeds).
#### 4.1.0
_Release Date: 21 January 2021_
* **NEW – Critical CSS**: Improve your First Contentful Paint (FCP) and Largest
Contentful Paint (LCP) times and eliminate the “Eliminate render-blocking resource”
recommendation
* **NEW – Sucuri integration**: Now you can enter your Sucuri API keys to have
Speed Booster Pack clear Sucuri’s cache each time SBP’s cache is cleared.
* **NEW – PageSpeed Tricker**: This experimental feature lets you see how easy
it is to _manipulate_ your PageSpeed/Lighthouse scores. Using this on a live
website is NOT recommended! Just have fun with it.
* **NEW – Cache warmup**: Now you can automatically cache all pages that are linked
from your homepage using the Cache Warmup setting.
* **Improved – CDN**: Our CDN feature is rewritten, making it way more efficient!
* **Improved – Cloudflare settings**: Now you can control your Cloudflare settings
on a more granular level!
* **Improved – Lazy loading**: Lazy loading now works better, faster and with more
themes & plugins. Most importantly, now our lazy loader supports infinite scrollers!
* **Improved – .htaccess**: Added support for caching AVIF file format on browsers.
* **Improved – Localize Analytics**: Added an admin bar button to refresh the local
analytics file. Also, moved the local analytics file into the /uploads/speed-
booster/ directory.
* **Improved – Hosting compatibility**: Improved compatibility with various hosting
companies.
* **Improved – Plugin compatibility**: Improved compatibility with various performance
plugins.
* **Improved – Options framework**: Removed folders of unused fields in Codestar
Framework, which powers our options framework.
* **Improved – Uninstalling process**: Updated `uninstall.php` for better cleanup
upon SBP deletion.
* **Improved – /vendor/**: External frameworks are now loaded from within a /vendor/
directory, using Composer.
* **Fixed**: The `crossorigin` parameter is added _only_ to preloaded fonts, not
all preload links.
* **Fixed**: WordPress 5.6 changed the jQuery core filename, breaking most performance-
related plugins including ours. Fixed that one.
* **Fixed**: Heartbeat settings caused a small PHP notice, which is now fixed.
* **Updated**: Options framework and lazy load library are updated to their latest
versions.
* **Removed**: Option to disable jQuery Migrate is now gone.
#### 4.0.1
_Release Date: 31 July 2020_
* **Fixed**: Small issues with the external notices are resolved.
#### 4.0.0
_Release Date: 18 July 2020_
**Speed Booster Pack v4.0 is written from scratch!** Almost all of our codebase
is rewritten, great new features are added, and we have an awesome new options panel
to show them all!
* **NEW – Caching**: With this new feature, you can now enable page and browser
caching which will greatly reduce database queries and help browsers cache static
assets more efficiently.
* **NEW – JavaScript deferring**: You can now choose to move JS to the footer **
or** defer parsing of JavaScript.
* **NEW – Custom Code Manager**: You can now add custom JavaScript code and make
them run deferred.
* **NEW – Cloudflare Integration**: User your Cloudflare API key to connect your
caching system to Cloudflare, so each time your cache is cleared, Cloudflare’s
cache will be purged as well.
* **NEW – Analytics Localizer**: You can now serve Google Analytics or Google Tag
Manager scripts (analytics.js, gtag.js, or gtm.js) from your own server, and
still keep it working.
* **NEW**: The brand new admin panel created with the Codestar Framework will help
you review and understand Speed Booster Pack’s options more easily.
* **Improved – Google Fonts optimization**: Our refactored code helps Google Fonts
load even faster now.
* **Improved – Compatibility**: Active plugins with features similar to Speed Booster
Pack will throw a dismissible notice to warn the user to be careful about the
overlapping features.
* **Fixed**: The Preboost feature outputted code without the `crossorigin` attribute,
which is now fixed.
* **Fixed**: The lazy load feature caused mixed content warnings in some edge cases,
which is now fixed.
* **Updated**: Updated external libraries (lazyload.js and instantpage.js) to their
latest versions.
*You can read the rest of the changelog on the [Speed Booster Pack documentation](https://speedboosterpack.com/)
page.
## Meta
* Version **4.5.9.1**
* Last updated **1 week ago**
* Active installations **9,000+**
* WordPress version ** 4.6 or higher **
* Tested up to **6.8.5**
* PHP version ** 5.6 or higher **
* Languages
* [Dutch](https://nl.wordpress.org/plugins/speed-booster-pack/), [English (Canada)](https://en-ca.wordpress.org/plugins/speed-booster-pack/),
[English (US)](https://wordpress.org/plugins/speed-booster-pack/), [French (France)](https://fr.wordpress.org/plugins/speed-booster-pack/),
[German](https://de.wordpress.org/plugins/speed-booster-pack/), [Hungarian](https://hu.wordpress.org/plugins/speed-booster-pack/),
[Persian](https://fa.wordpress.org/plugins/speed-booster-pack/), [Romanian](https://ro.wordpress.org/plugins/speed-booster-pack/),
[Russian](https://ru.wordpress.org/plugins/speed-booster-pack/), [Spanish (Chile)](https://cl.wordpress.org/plugins/speed-booster-pack/),
[Spanish (Colombia)](https://es-co.wordpress.org/plugins/speed-booster-pack/),
[Spanish (Ecuador)](https://es-ec.wordpress.org/plugins/speed-booster-pack/),
[Spanish (Spain)](https://es.wordpress.org/plugins/speed-booster-pack/), [Spanish (Venezuela)](https://ve.wordpress.org/plugins/speed-booster-pack/),
and [Turkish](https://tr.wordpress.org/plugins/speed-booster-pack/).
* [Translate into your language](https://translate.wordpress.org/projects/wp-plugins/speed-booster-pack)
* Tags
* [cache](https://wordpress.org/plugins/tags/cache/)[core web vitals](https://wordpress.org/plugins/tags/core-web-vitals/)
[optimization](https://wordpress.org/plugins/tags/optimization/)[pagespeed](https://wordpress.org/plugins/tags/pagespeed/)
[speed](https://wordpress.org/plugins/tags/speed/)
* [Advanced View](https://wordpress.org/plugins/speed-booster-pack/advanced/)
## Ratings
4.3 out of 5 stars.
* [ 139 5-star reviews ](https://wordpress.org/support/plugin/speed-booster-pack/reviews/?filter=5)
* [ 10 4-star reviews ](https://wordpress.org/support/plugin/speed-booster-pack/reviews/?filter=4)
* [ 9 3-star reviews ](https://wordpress.org/support/plugin/speed-booster-pack/reviews/?filter=3)
* [ 6 2-star reviews ](https://wordpress.org/support/plugin/speed-booster-pack/reviews/?filter=2)
* [ 22 1-star reviews ](https://wordpress.org/support/plugin/speed-booster-pack/reviews/?filter=1)
[Your review](https://wordpress.org/support/plugin/speed-booster-pack/reviews/#new-post)
[See all reviews](https://wordpress.org/support/plugin/speed-booster-pack/reviews/)
## Contributors
* [ Optimocha ](https://profiles.wordpress.org/optimocha/)
* [ Speed Booster Pack ](https://profiles.wordpress.org/speedboosterpack/)
## Support
Issues resolved in last two months:
1 out of 1
[View support forum](https://wordpress.org/support/plugin/speed-booster-pack/)