內容簡介
xSpeed Cache 是一款強大的 WordPress 快取外掛，透過簡單的設定，顯著提升網站載入速度，並改善 Google PageSpeed 分數。它不僅提供快取功能，還具備代碼壓縮、GZIP 壓縮及圖片延遲載入等多項優化，讓使用者無需專業技術即可享受流暢的網站體驗。
【主要功能】
• 快取靜態 HTML 頁面，提升載入速度
• 自動清除快取，保持內容即時更新
• 支援 GZIP 壓縮，減少檔案大小
• 延遲載入圖片、影片及 iframe，提升效能
• 簡化代碼，減少 HTTP 請求次數
• 支援 Redis 和 Memcached 物件快取
外掛標籤
開發者團隊
② 後台搜尋「xSpeed Cache: AI-Powered Performance Hub with MCP, Caching & CDN」→ 直接安裝（推薦）
📦 歷史版本下載
原文外掛簡介
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.
Built by the team at WPDeveloper, trusted by over 6 million WordPress users worldwide.
What This WordPress Caching Plugin Does
xSpeed Cache caches your pages, shrinks your code, compresses your files and serves everything as fast as your server can. The result is faster pages, better Google PageSpeed scores and better Core Web Vitals, without hiring a developer.
The Speed Advantage No Other Free WordPress Cache Plugin Offers
When xSpeed Cache caches a page, the web server serves it directly, bypassing PHP entirely.
With xSpeed static cache: 5 to 15ms response time
Without it (PHP-served cache): around 85ms response time
That is up to 17x faster page delivery on cache hits, set up automatically on Apache, nginx and LiteSpeed.
Features at a Glance
AI Assistants and the WordPress MCP Server
xSpeed Cache ships a WordPress MCP server, so Claude or any other MCP client can inspect and tune your site through the same tools the dashboard uses. Every action is limited to what you allow when you connect.
Set up an AI connection from the MCP card on the Overview
Read-only connections can read status, while write actions stay refused
An AI assistant cannot write credentials unless you grant that permission when connecting
WP-CLI parity: wp xspeed purge, wp xspeed preloader status, wp xspeed score run, wp xspeed optimize and wp xspeed settings list|get|update
The optimize_site tool measures the site, applies recommended settings one at a time, re-checks the page after each change and reverts anything that breaks it
Disable Bloat
Disable dashicons on the frontend
Remove oEmbed, RSS feeds, XML-RPC, jQuery Migrate and REST API authentication headers
AI-Powered Site Audit (Pro)
xSpeed Pro scans your site and tells you which performance features will help the most, with severity ratings and concrete reasons.
Page Caching
Pages are saved as static HTML files and served before WordPress loads. The cache rebuilds itself when you publish a post, switch themes or update a plugin.
Static-file rewrite path that bypasses PHP entirely for a 5 to 15ms TTFB
Auto-purge on publish, update, comment and theme change
One-click cache purge from the admin bar
Exclude specific URLs such as /cart, /checkout and /my-account
Set your own cache expiry, from 1 to 720 hours
Separate mobile cache for phone and tablet visitors
Per-post cache rules with custom expiry, or disable caching for individual posts
Code Minification
Minify HTML, CSS and JavaScript
Combine CSS and JS files to reduce HTTP requests
Defer or delay JavaScript so it does not block page rendering
Async CSS loading
Removes ?ver= query strings from asset URLs (generated files under wp-content/uploads keep theirs, so a page-builder or consent-banner edit still reaches returning visitors)
Safe-minify skips already-minified files and falls back if anything looks off
GZIP Compression
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, so there is no double-configuration
Lazy Load Images, Videos and Iframes
Lazy load images, iframes and videos so they load when a visitor scrolls to them
Adds missing image sizes so the layout does not jump
Font Optimization
Adds font-display: swap so text is visible immediately while fonts load
Preloads above-the-fold font files
Removes the blank-text flash caused by slow Google Fonts responses
Browser Cache
Sets Cache-Control and Expires headers for images, CSS and JS, with no manual configuration
Cache Preloader
Sitemap-driven cache warmer, so the first visitor after a purge still gets a fast page
Auto-warms the cache when you publish or update content
Redis and Memcached Object Cache
Connect Redis or Memcached in seconds, as a drop-in persistent object cache
View status and flush the object cache from the dashboard
CDN and Cloudflare
Pull-zone URL rewriting for any CDN provider
Cloudflare integration: connect your zone, auto-purge on publish and toggle development mode
Database Cleanup
Optimize database tables
Remove post revisions, spam, trash, transients and orphaned meta
Schedule automatic cleanup
Built to Handle WordPress Edge Cases
Multisite ready. Each site in the network gets its own cache and settings.
LiteSpeed server? xSpeed Cache also clears the server’s LiteSpeed cache whenever it clears its own. If the LiteSpeed Cache plugin is active, xSpeed Cache will not turn on its own page cache or the other features that overlap, so the two never run at once.
WooCommerce? Logged-in customers and checkout pages are never cached.
WordPress Site Health. xSpeed Cache adds its own check under Tools → Site Health.
Works on any server. Apache, nginx, LiteSpeed, IIS and any standard PHP host.
Designed for Everyone
Non-technical users: A 3-step setup wizard configures the plugin in under 2 minutes. Settings save automatically.
Developers: REST API at /wp-json/xspeed/v1/, developer filters (xspeed_skip_minify, xspeed_strip_asset_version, xspeed_cache_skip_for_post, xspeed_cache_expiry_for_post), WP_DEBUG awareness, and a React 18 and TypeScript admin UI.
Agencies: Use the xspeed_branding filter to white-label the dashboard for clients.
Private By Default
xSpeed Cache stores no IP addresses and sets no tracking cookies. Out of the box, the only request it makes is a check to your own site’s home URL to confirm GZIP is active, at most once an hour.
Usage analytics is optional and off by default. If you turn it on in the setup wizard or in xSpeed Cache → Settings → Privacy & usage data, it sends your email address and display name, your site’s setup and which xSpeed Cache features you use. Page content is never sent. See the External services section below for every service the plugin can contact.
If xSpeed Cache makes your site faster, please leave a review on WordPress.org.
External services
Out of the box, xSpeed Cache contacts only your own site (the gzip probe below). Every other service on this list runs only after an administrator turns it on, connects it or presses a button. None of them runs on a fresh install.
Usage analytics is off by default. The setup wizard shows it as an unticked switch, and xSpeed Cache → Settings → Privacy & usage data has the same switch. Nothing is sent until you turn it on. Turning it off stops all sending and clears the scheduled send. The deactivation survey is separate and sends nothing unless you click Submit. Speed tests and xSpeed Scan run only when you press Test or Scan, never on a schedule.
Self-hosted gzip probe
What it does: Sends one GET request with Accept-Encoding: gzip to your site’s home URL, to see whether your server already gzips responses. Only the Content-Encoding header is read.
When it runs: When the dashboard loads server status, at most once an hour.
Where the request goes: Your own site. Nothing is sent anywhere else.
xSpeed Hub (app.xspeedcache.com)
What it does: Lets you manage this site, with other sites, from one xSpeed Hub account and one AI connection.
When it runs: Only after an administrator connects the site to xSpeed Hub from xSpeed Cache → AI & agents. A site that was never connected makes no Hub requests.
What is sent: The site URL and this site’s MCP token, which the Hub uses to call the site’s own MCP endpoint. The token is sent when the site is connected, when the connection status is checked, when the token changes (Rotate, or Connect after Disconnect), when you disconnect, and with speed-test requests you start.
After an xSpeed Scan: When a scan you run from the plugin finishes on a connected site, the site sends the Hub that scan’s id, so the Hub can compare it with the site’s earlier scans. Only the id and the site URL are sent. The Hub reads the report from the scan service itself.
Where the request goes: app.xspeedcache.com, operated by WPDeveloper.
The broker URL: The AI & agents screen also shows an api.xspeedcache.com address that you can paste into an AI client. The plugin never contacts that address. Only your AI client does, and only if you set it up that way.
Terms and privacy: Terms, Privacy.
Usage analytics and deactivation survey (send.wpinsight.com)
What it does: Tells WPDeveloper which WordPress setups and xSpeed features are in use, so we can fix what breaks.
When it runs: Only after an administrator turns on “Share usage data” in the setup wizard or in Settings → Privacy & usage data. It sends once a day, and once more when the plugin is deactivated.
What is sent: The site URL and name, WordPress and PHP versions, site language, charset, text direction, multisite status, server software, active and inactive plugins, theme name and version, the xSpeed version and xSpeed’s own settings. The send when you turn the switch on, and the one at deactivation, also include the email address and display name of the administrator who did it. The daily send runs without a logged-in user, so it has no email or name. Page content is never sent.
Deactivation survey: If you pick a reason and click Submit when deactivating, the reason and any text you typed are sent. With analytics off, the survey sends only the reason, your text, the site URL, the WordPress, PHP and xSpeed versions, and the date. Skip & Deactivate sends nothing.
Where the request goes: send.wpinsight.com, operated by WPDeveloper. Terms, Privacy.
Speed tests: Google PageSpeed Insights and GTmetrix
What it does: Shows a Lighthouse or GTmetrix score next to the dashboard’s own timing benchmark.
When it runs: Only when an administrator presses Test, or an AI agent you connected runs the speed-test command. There is no schedule. A GTmetrix test that is still queued is checked when you open its status, for at most 30 minutes.
What is sent: The URL of the page being tested, the test strategy (mobile or desktop) and, if you entered one, your API key. GTmetrix always needs your own key.
Where the request goes: www.googleapis.com (Google PageSpeed Insights: Terms, Privacy) or gtmetrix.com (GTmetrix: Terms, Privacy), whichever provider you chose.
xSpeed Scan (xspeedcache.com)
What it does: Grades the site across speed, delivery, assets and stack, with a fix for every failed check.
When it runs: Only when an administrator presses Scan, or an AI agent you connected runs the scan command.
What is sent: The URL to scan, the test strategy, and whether the report should be listed. The scan service then loads that URL like any visitor would.
Who can see the report: For a site that is not connected to xSpeed Hub, the report is listed on a public page for that domain. For a connected site, it is unlisted: kept off the public page, but anyone with its link can open it.
Where the request goes: xspeedcache.com/api/scan, operated by WPDeveloper. Terms, Privacy.
Cloudflare API (api.cloudflare.com)
What it does: Purges Cloudflare’s cache for your zone, turns development mode on or off, and checks your credentials.
When it runs: Only after an administrator enters Cloudflare credentials and turns the integration on. It then runs when you press Purge, Verify or Development mode, and each time xSpeed clears its own cache if “Clear Cloudflare with xSpeed” is on.
What is sent: Your API token (or email and Global API key), your zone ID, and the URLs to purge.
Where the request goes: api.cloudflare.com, operated by Cloudflare. Terms, Privacy.
YouTube video posters (i.ytimg.com)
What it does: “Click-to-play videos” (off by default) replaces YouTube embeds with a poster image and a play button.
When it runs: On pages with a YouTube embed, once the option is on. The request comes from your visitors’ browsers, not from your server.
What is sent: The browser requests the video’s poster image, so YouTube receives the visitor’s IP address, browser details and the video ID. The full YouTube player, which sends more, loads only when the visitor clicks play.
Where the request goes: i.ytimg.com, operated by Google. Terms, Privacy.
Image size lookup for images on other sites
What it does: “Add missing image sizes” (on by default) adds width and height to images that lack them, so the page does not jump as they load. Images in your media library are measured locally. For an image hosted on another site, xSpeed Cache reads the start of the file to get its size.
When it runs: Only while the cache is being warmed by the preloader, a cron task or WP-CLI, never during a visitor’s request. Each URL is looked up once and the result is stored.
What is sent: A GET request for the first 32 KB of the image, from your server to the site hosting it. No data about your site or visitors is sent.
Where the request goes: The host of each image, which you chose by putting the image on your page. To turn the lookup off, use add_filter( 'xspeed_lazy_remote_dimensions', '__return_false' ); or turn off “Add missing image sizes”.
Source code
assets/admin.js and `assets/admin.css` are built from the uncompressed TypeScript and React source of the admin interface, which ships in the plugin's `src/` folder.
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
