Speed Optimizer – The All-In-One Performance-Boosting Plugin vs xSpeed Cache – AI-Powered Performance Hub with MCP, Caching & CDN

The award-winning Speed Optimizer plugin is a free WordPress performance-boosting solution to improve user experience, increase conversion rates and drive more traffic. Achieve better SEO rankings, improve Core Web Vitals and enhance your Google Page Speed Score. Developed by the WordPress speed experts at SiteGround, our free plugin is actively used and trusted by more than 2 million website owners. It’s specially designed to be easy to use, allowing users of all skill levels to make complex speed optimizations, such as minifying HTML, CSS and JavaScript, image compression and lazy loading, in a few clicks. Install our caching plugin now to dramatically improve your WordPress website performance on any hosting platform. Essential Speed-boosting Features: Powerful Caching for up to 20% faster website. Frontend Optimizations to minify JS, HTML and CSS, reducing wait time due to the number of scripts and characters in your code Media Optimizations by up to 85% image size compression without sacrificing quality WordPress Environment Optimizations to optimize usage and efficiency of your WordPress site resources Speed Test & tips to get on-demand optimization tips to help your site get even faster Don’t let a slow website compromise your online success. Join the millions of satisfied website owners and see the difference with the free Speed Optimizer plugin. AWARDS: Monster Awards 2022: Best WordPress Optimization Plugin 🥈 Plugin Video Plugin Tutorial To gain in-depth knowledge about our plugin and its functionalities, check our Speed Optimizer Tutorial. It provides detailed information on how to optimize each aspect of your site and maximizes your website performance and cache. CACHING The Caching page gives you full control of your website’s cache, allowing you to enhance its performance significantly. Take advantage of the powerful caching options available to boost your page speed: DYNAMIC CACHING: By enabling Dynamic Caching, all non-static resources of your website are intelligently cached, eliminating the need for repetitive database queries and enhancing page loading speed and TTFB (time to first byte). This default feature is available exclusively for SiteGround servers, ensuring optimal performance. FILE-BASED CACHING: By activating file-based caching, your website generates and stores static HTML versions, ensuring faster loading times and an improved user experience. This efficient caching method stores the cached files conveniently in the browser’s memory, allowing future visitors to access your site swiftly and seamlessly. MEMCACHED: Unleash the power of object caching for your WordPress website. Memcached revolutionizes website performance by storing frequently executed queries to your databases and reusing them for lightning-fast website results. This powerful feature is exclusively available in the SiteGround environment. CACHING SETTINGS: Automatic Cache Purge: ensure the cache is cleared whenever necessary Manual Cache Purge: purge cache manually if you are editing new material and do not have automatic purge activated. Browser-specific Caching: generate caching separately for different browsers Exclude Post Types from Caching: exclude specific post types from being cached Exclude URLs from Caching: exclude specific URLs or utilize wildcards to exclude any sub-pages of a designated “parent-page.” Test URL Caching Status: verify if dynamic caching is actively running on specific URLs ENVIRONMENT OPTIMIZATIONS Optimize and fine-tune your site’s environment for optimal website performance: HTTPS Enforce: Ensure a secure browsing experience for your visitors by effortlessly enabling HTTPS for your site. Say goodbye to insecure content errors and build trust with your audience. Scheduled Database Maintenance: Take control of your database by activating the Database Optimization feature. This functionality removes unnecessary items and optimizes your database tables, leading to improved efficiency and website performance. If you’re using the InnoDB storage engine, table optimisation is automatically handled by the engine itself. Heartbeat Control: Manage the frequency of the WP Heartbeat for different areas of your website. By default, the WordPress Heartbeat API checks for scheduled tasks every 15 seconds on post edit pages and every 60 seconds on the dashboard and front end. With Heartbeat Control, you can adjust the frequency of these checks or even disable them entirely, providing you with greater control over resource allocation. FRONTEND OPTIMIZATIONS Enhance and fine-tune the performance of your website’s front end by minifying JS, HTML and CSS: CSS Tab: Minify CSS files, activate or deactivate CSS combinations to reduce server requests, and even preload combined CSS for optimized performance. Additionally, you can exclude specific styles from being combined or minified, giving you complete control over your CSS optimization. JavaScript Tab: Activate or deactivate Minify JavaScript Files to reduce script sizes and lower the number of server requests. You can also defer render-blocking JavaScript to expedite the initial page speed. Furthermore, you have the ability to exclude specific scripts from various optimisation processes, providing flexibility in optimizing your JavaScript resources. General Tab: Further optimization options include: Web Fonts Optimization: Enhance the loading of Google fonts by adding a preconnect link in your head tag. This informs the browser to establish a connection to Google’s font repository as quickly as possible. Additionally, all other local fonts will be preloaded, resulting in faster caching and rendering. When combined with CSS Combination, we also modify the font-display property to improve rendering speed. Fonts Preloading: With locally hosted fonts being preloaded, you’re allowing browsers to cache and render them at an accelerated pace. Remove Query Strings from Static Resources: Improve caching efficiency by removing query strings from static resources, optimizing their caching capabilities. Disable Emojis: Prevent WordPress from detecting and generating emojis on your pages by disabling emojis support. This helps boost your page speed and improve your website performance. DNS Pre-fetch for External Domains: Enabling the DNS Pre-fetch for a domain will resolve it before resources from it get requested making those resources load faster. MEDIA OPTIMIZATIONS Optimize your website media by reducing image size by up to 85% times while maintaining top-notch quality. Image Compression: Effortlessly compress images to resize your existing images and reduce the space they occupy on your server. The dimensions of the images will remain unchanged, allowing for optimized storage. Fine-tune the compression level and choose whether to create backups of the original images. Please note that image compression feature is exclusive to the SiteGround Environment. WebP Images: Leverage the power of WebP, a cutting-edge image format supported by modern browsers, to significantly reduce the size of your images and skyrocket your page speed. If a browser doesn’t support WebP, the original images will be loaded. Lazy Load Media: Take control of your website’s asset loading with the ability to enable or disable Lazy Load for various assets. You can exclude specific assets such as iframes, videos, thumbnails, widgets, and shortcodes from the dropdown menu. Additionally, you have the option to exclude specific images from the Lazy Load by adding their respective class in the dedicated tab. Maximum Image Width: If you frequently upload large images to your website, you can enable the Maximum Image Width option that automatically resizes existing and future images whose width exceeds 2560 pixels. By optimizing image sizes, you can enhance your website performance and reduce bandwidth usage. You can customize your media optimisation to your specific needs using the filters, we’ve designed for this purpose. SPEED TEST Evaluate the optimization level of your website with Speed Optimizer’s Speed test tool. Our website performance check utilizes the robust capabilities of Google PageSpeed to provide comprehensive insights into your site’s optimization. By conducting the speed test, you will receive detailed results highlighting areas that can be further optimized for enhanced performance. These insights will empower you to fine-tune your website and unlock its maximum potential and increase conversions. Requirements In order to work correctly, this plugin requires that your server meets the following criteria: WordPress 5.5.1 PHP 7.0+ Our plugin uses a cookie in order to function properly. It does not store personal data and is used solely for the needs of our caching system. Data Collection Collection of technical data is optional and is listed here. This data is collected only for technical analysis, improvements and the possibility to contact the plugin user in case urgent issues need to be fixed (for example a critical security release that needs to be communicated to site owners). The plugin user can manage their preferences within the WP admin to control the collection of technical data. We advise opting in for this data collection, as it can enhance the plugin’s performance. You may find more information on data collection in our Plugins Privacy Notice. Credits Photo credits to Anna Shvets https://www.pexels.com/@shvetsa

Your visitors decide to stay or leave in under 3 seconds. xSpeed Cache makes sure they stay. Most caching plugins bury you in settings, charts, and upgrade popups. xSpeed Cache does the opposite — install it, flip one switch, and your site loads faster. No bloat, no upsells nagging you, no PhD required. Built by the team at WPDeveloper — trusted by over 7 million WordPress users worldwide. What Does xSpeed Cache Do? xSpeed Cache is a full-site performance plugin. It caches your pages, shrinks your code, compresses your files, and serves everything as fast as your server physically can — including an AI-powered audit that tells you exactly what’s slowing your site down. The result: pages that load in milliseconds, not seconds. Better Google PageSpeed scores. Happier visitors. Better SEO rankings. The Speed Advantage No Other Free Plugin Offers When xSpeed Cache caches a page, it doesn’t just save it — it serves it directly from the server, bypassing PHP entirely. That means: With xSpeed static cache: 5–15ms response time Without it (PHP-served cache): ~85ms response time That’s up to 17× faster page delivery on cache hits. No other free caching plugin does this across Apache, nginx, and LiteSpeed automatically. Features at a Glance Page Caching Your pages are saved as static HTML files and served instantly to visitors — before WordPress even loads. The cache rebuilds itself automatically whenever you publish a post, switch themes, or update a plugin. You never have to think about it. Static-file rewrite path (bypasses PHP entirely — 5–15ms TTFB) Auto-purge on publish, update, comment, theme change One-click cache purge from the admin bar Exclude specific URLs (e.g. /cart, /checkout, /my-account) Set your own cache expiry (1–720 hours) Separate mobile cache for phone and tablet visitors Per-post cache rules — custom expiry or disable caching for individual posts Code Minification Strips all the unnecessary whitespace, comments, and characters from your HTML, CSS, and JavaScript without breaking anything. Minify HTML, CSS, and JavaScript Combine CSS and JS files to reduce HTTP requests Defer or delay JavaScript so it doesn’t block page rendering Async CSS loading Removes ?ver= query strings from asset URLs Safe-minify: automatically skips already-minified files and falls back if anything looks off GZIP Compression Makes every file your server sends smaller — so browsers download them faster. Auto-configures GZIP on Apache and LiteSpeed Shows a ready-to-paste config snippet for nginx and IIS Detects if your server already has GZIP active — no double-configuration Lazy Load Images, videos, and iframes load only when a visitor scrolls to them — not all at once on page load. Lazy load images, iframes, and videos Automatic CLS (Cumulative Layout Shift) fix so your layout doesn’t jump Fonts Optimization Web fonts are one of the most common causes of slow-loading pages. Adds font-display: swap so text is visible immediately while fonts load Preloads above-the-fold font files for instant rendering Removes the blank-text flash caused by slow Google Fonts responses Browser Cache Tells browsers to remember your static files (images, CSS, JS) so returning visitors load your site even faster. Sets proper Cache-Control and Expires headers Works automatically — no manual configuration needed Cache Preloader Warms up your cache automatically so the very first visitor after a purge still gets a fast page. Sitemap-driven cache warmer Auto-warms cache when you publish or update content Object Cache (Redis / Memcached) Speed up database-heavy WordPress installs with server-side object caching. Connect Redis or Memcached in seconds View status and flush cache from the dashboard CDN Support Serve your static files from a CDN for faster global delivery. Pull-zone URL rewriting for any CDN provider Built-in Cloudflare integration: connect your zone, auto-purge on publish, toggle dev mode Database Optimization A bloated database slows down every page load. xSpeed Cache keeps yours clean. Optimize database tables Remove post revisions, spam, trash, transients, and orphaned meta Schedule automatic cleanup so it runs on autopilot Disable Bloat Turn off WordPress features you don’t use — each one is a request your server doesn’t have to make. Disable dashicons on the frontend Remove oEmbed, RSS feeds, XML-RPC, jQuery Migrate, REST API authentication headers AI-Powered Site Audit (Pro) xSpeed Pro scans your specific site and tells you exactly which performance features will help the most — with severity ratings and concrete reasons, not generic advice. Smart Enough to Stay Out of Trouble xSpeed Cache handles the edge cases other plugins miss: Multisite ready — each site in the network gets its own cache and settings. LiteSpeed server? — xSpeed Cache detects LiteSpeed Cache’s server module and steps back to avoid conflicts. WooCommerce? — logged-in customers and checkout pages are never cached. WordPress Site Health — xSpeed Cache adds its own health check under Tools → Site Health so you always know your cache config is working correctly. Works on any server — Apache, nginx, LiteSpeed, IIS, and any standard PHP host. Designed for Everyone Non-technical users: A 3-step setup wizard walks you through first-time configuration in under 2 minutes. Settings auto-save — there’s no Save button to forget. Developers: REST API at /wp-json/xspeed/v1/, developer filters (xspeed_skip_minify, xspeed_cache_skip_for_post, xspeed_cache_expiry_for_post), WP_DEBUG awareness, and a React 18 + TypeScript admin UI under 80 KB gzipped. Agencies: Use the xspeed_branding filter to white-label the dashboard for clients. Private By Default xSpeed Cache never collects personal data, stores IP addresses, or uses tracking cookies. Every optimization runs locally on your server. By default it makes no calls to any third-party server — the only request is a quick check to your own site’s home URL to confirm GZIP is active, rate-limited to once per hour. xSpeed Cache also includes optional usage analytics. The setup wizard shows a clearly-labeled consent control for it (enabled by default, untick to opt out), and nothing is sent until you confirm your choices in the wizard. When enabled, xSpeed Cache shares anonymous, non-sensitive diagnostics — your WordPress & PHP version, active theme & plugins, server type, site language, and which xSpeed Cache features you have switched on — so we know what to keep fast and compatible. No personal data and no page content are ever sent, and you can turn it off again at any time from your dashboard. (See “External services” below.) Backed By a Team You Trust xSpeed Cache is developed by the trusted team at WPDeveloper, a leading WordPress marketplace used and loved by millions of users. Loved xSpeed Cache? If xSpeed Cache makes your site faster, please leave a review on WordPress.org — it really helps! External services xSpeed Cache contacts your own site (the gzip probe below); when usage analytics is enabled, an analytics service; only if you choose to submit the optional deactivation survey, that same service; and — only if you turn it on — one external performance-score provider. The setup wizard shows a clearly-labeled consent control for analytics (enabled by default, untick to opt out), and nothing is sent until you confirm your choices there. The deactivation survey is separate and never sends anything unless you explicitly click Submit. External scores are off by default and never run on their own. Self-hosted gzip probe What it does: Issues a single GET request to your site’s home URL (home_url('/')) with an Accept-Encoding: gzip header to detect whether your web server is already serving gzipped responses. The response body is discarded; only the Content-Encoding header is read. When it runs: On demand when the admin dashboard loads server status, throttled to once per hour via a transient (xspeed_gzip_active). Where the request goes: Your own site (home_url()). This request goes only to your own server. What is sent: No personal data, no site identifiers, no payload — just a standard HTTP GET from your server back to your server. Usage analytics (opt-in, off by default) What it does: When usage analytics is enabled, xSpeed Cache periodically sends anonymous, non-sensitive diagnostics to help us keep the plugin fast and compatible with real-world WordPress environments. Data sent: site URL, site name, WordPress version, PHP version, site language & charset, multisite flag, server software, your list of active & inactive plugins, active theme & version, text direction, and your xSpeed Cache feature usage (which optimization features you have switched on and their numeric settings — e.g. cache lifetime, minification, lazy-load). This is feature-usage data only: it tells us which features are actually used so we can focus on what matters. We never send any values you enter — no API keys, tokens, passwords, license keys, email addresses, URLs, brand names, or logos — and no page content, no visitor data, and no personal data (your email is never collected in the free plugin). When it runs: It runs at most once per day via WP-Cron, only after you confirm your choices in the setup wizard. Untick the consent control (or disable it later from the dashboard) and nothing is ever sent. Where the request goes: WP Insights, WPDeveloper’s usage-analytics service — https://send.wpinsight.com/process-plugin-data. (Privacy Policy) How to turn it off: Untick the consent control in the wizard, or disable it later from the xSpeed Cache dashboard. Opting out stops all data collection and clears the scheduled task. External performance scores (opt-in, off by default) What it does: Lets you run a performance audit of one of your own pages from the dashboard and shows the score alongside xSpeed Cache’s internal TTFB benchmark. Two providers are supported: Google PageSpeed Insights (works without an API key; you may add your own key to raise Google’s anonymous rate limit) and GTmetrix (requires your own API key — it has no anonymous mode). When it runs: Only when you press Test now on the dashboard, or run wp xspeed score run. There is no schedule and no background call. If the feature is left off — which is the default — no request is ever made. Where the request goes: Google PageSpeed Insights — https://www.googleapis.com/pagespeedonline/v5/runPagespeed (Terms, Privacy Policy) — or GTmetrix — https://gtmetrix.com/api/2.0/tests (Terms, Privacy Policy). What is sent: The URL you are testing (your own page, which the provider then fetches publicly) and, if you supplied one, your own API key for that provider. No personal data, no visitor data, and no site content are sent by the plugin. How to turn it off: Switch “Enable external scores” off in the xSpeed Cache dashboard (Health → PageSpeed). Past results stay in your database until you clear them. Deactivation feedback (optional, only when you submit it) What it does: When you deactivate xSpeed Cache, a short optional survey asks why, so we can fix problems and prioritize the right features. Nothing is sent unless you pick a reason and click Submit & Deactivate. What is sent: the reason (or reasons) you selected and any note you type. If usage analytics (above) is enabled, that reason is attached to your regular analytics report. If usage analytics is disabled, only a minimal message is sent — the reason, your optional note, your site URL, the xSpeed Cache version, and your WordPress & PHP version — and nothing else (no plugin list, no theme data, no personal data, no page content). When it runs: Only on the deactivation screen, and only when you click Submit & Deactivate. Choosing Skip & Deactivate, closing the dialog, or pressing Esc sends nothing at all. Where the request goes: WP Insights, WPDeveloper’s service — https://send.wpinsight.com/process-plugin-data. (Privacy Policy) How to avoid it: Click Skip & Deactivate (or close the dialog) instead of Submit — deactivation works exactly the same, with no data sent. Third-party libraries This plugin bundles the following GPL-compatible third-party libraries: matthiasmullie/minify Used for CSS and JavaScript minification. Source: https://github.com/matthiasmullie/minify License: MIT matthiasmullie/path-converter Dependency of matthiasmullie/minify. Source: https://github.com/matthiasmullie/path-converter License: MIT React / React DOM / Scheduler Used for the xSpeed Cache admin interface bundle. Source: https://github.com/facebook/react License: MIT lucide-react Used for admin interface icons. Source: https://github.com/lucide-icons/lucide License: ISC