How to Reduce Time to First Byte (TTFB) in WordPress – Expert Tips

How to Reduce Time to First Byte (TTFB) in WordPress for Faster Load Times

Does your WordPress site feel sluggish with pages taking forever to load? One of the key metrics responsible could be a high time to first byte or TTFB.

In this comprehensive guide, you‘ll learn what TTFB means, why it‘s crucial for your WordPress site‘s performance, and proven ways to reduce it for a faster, snappier user experience.

What is Time to First Byte (TTFB)?

Time to first byte is the time it takes for a user‘s web browser to receive the first byte of data from your website‘s server after requesting a page. In other words, it measures the responsiveness of your server to a visitor‘s request.

TTFB includes the time spent on DNS lookup, establishing a TCP connection, doing the SSL/TLS handshake for HTTPS sites, and the server processing the request before starting to send data. A lower TTFB means your WordPress hosting server responds quickly to display your content.

According to Google PageSpeed Insights, the ideal TTFB should be under 200 ms. Anything over 600 ms is considered poor. However, the actual TTFB will vary based on the complexity and size of the requested page.

Why Does Reducing TTFB Matter for WordPress Sites?

While TTFB is not a direct Google ranking factor, it has a big influence on the page load time and user experience. A high TTFB means visitors have to wait longer before they can start viewing your content, leading to frustration and higher bounce rates.

Moreover, Core Web Vitals metrics like Largest Contentful Paint (LCP), which Google uses for search rankings, can‘t be optimized if your server is slow to respond in the first place. So reducing TTFB lays the foundation for a fast loading, user-friendly WordPress site that both visitors and search engines will love.

How to Test WordPress TTFB

Before optimizing your WordPress site‘s TTFB, it‘s important to measure it accurately to get a baseline. Here are some popular tools you can use:

1. PageSpeed Insights – Google‘s free tool analyzes your page and shows the TTFB under the "Origin Summary" section.

2. Chrome DevTools – Press F12 to open Chrome Developer Tools, go to the Network tab, and refresh your page. The "Waiting (TTFB)" column shows the TTFB for each resource.

3. GTmetrix – This free tool shows a detailed performance report for your WordPress site, including the TTFB under the "Timings" tab.

4. Pingdom – Another popular website speed test that measures TTFB along with other metrics.

5. KeyCDN Performance Test – A quick and easy way to check TTFB from 14 locations around the world.

It‘s a good idea to test your WordPress TTFB using multiple tools at different times to get an average picture. Also, test key pages like your homepage, major landing pages, etc. instead of just one page.

8 Proven Ways to Reduce TTFB in WordPress

Now that you know what TTFB is and how to measure it, let‘s dive into the proven optimizations to bring it down and speed up your WordPress site.

1. Use a Fast WordPress Hosting Provider

Your web hosting server‘s speed and performance have the biggest impact on TTFB. If you‘re using a slow shared host oversaturating its servers, your pages will take longer to load no matter what other optimizations you do.

It‘s best to use a managed WordPress hosting provider that‘s built for speed, with server-level caching, the latest PHP versions, a CDN, and other performance optimizations out of the box. Some of the top WordPress hosts known for their exceptional speed are:

• WP Engine
• Kinsta
• Cloudways
• SiteGround
• Flywheel

Investing in a quality, reputable WordPress host might be more expensive than cheap shared hosting, but it will make the biggest difference in reducing your TTFB and improving Core Web Vitals scores.

2. Keep WordPress Updated

Each major WordPress release usually contains performance improvements that help make your site faster. For example, WordPress 5.9 improved the performance of the block editor by up to 170%.

Plus, newer WordPress versions are compatible with the latest PHP releases offering massive speed boosts (more on this later).

To reduce TTFB, make sure you‘re always running the latest WordPress version. You can enable auto-updates or manually update from the Updates page in your WordPress admin dashboard.

The same goes for your WordPress plugins and themes. Keep them updated to ensure compatibility with the latest WordPress and PHP versions and to leverage any speed optimizations.

That said, deactivate and delete any plugins you aren‘t using. Too many WordPress plugins can slow down your site, so only keep the ones essential for your site‘s functionality.

3. Set Up Page Caching

Page caching is an essential optimization for any WordPress site, especially those with lots of traffic and dynamic content.

Normally, WordPress dynamically generates each page by querying the MySQL database and running PHP code to combine template files. This process can take anywhere from a few milliseconds to a few seconds depending on your server resources and page complexity.

With page caching, a copy of your page‘s HTML is stored on the server after the first load. Subsequent visitors are served this cached version until the cache is cleared. This reduces the number of requests to the database and server processing time.

The result? Your TTFB can come down from over 1 second to 200 ms or less just by turning on page caching.

Most managed WordPress hosts have built-in server-level caching. But if your host doesn‘t provide caching or you‘re using a shared host, you can use a WordPress caching plugin like:

• WP Rocket
• W3 Total Cache
• WP Super Cache
• LiteSpeed Cache

Some of these plugins also have extra performance features like lazy loading, file minification, and more. WP Rocket is a premium plugin with an easy set up wizard, while the others are free and open-source.

4. Implement a Content Delivery Network (CDN)

A content delivery network (CDN) can significantly improve your TTFB for visitors located far from your hosting server. A CDN stores a cached version of your WordPress site on a global network of edge servers.

When someone visits your site, they‘re served content from the nearest CDN location instead of your origin server. This reduces the physical distance data has to travel, cutting down TTFB and speeding up your page load time.

Implementing a CDN is easy and can be done in a few different ways:

• Use a managed WordPress host that provides a built-in CDN (Kinsta and WP Engine both do)
• Use the CDN provided by your host (e.g. Cloudflare for most SiteGround plans)
• Use a third-party CDN provider like KeyCDN, StackPath, or Bunny.net and connect it to your WordPress site using a plugin

Besides reducing TTFB, a good CDN can protect your WordPress site from DDoS attacks and traffic spikes by absorbing the load.

5. Optimize Your WordPress Database

Over time, your WordPress database can accumulate clutter like post revisions, spam comments, orphaned metadata, transients, and more. This can cause your database to bloat in size and slow down queries, increasing TTFB.

You can optimize your WordPress database through the wp-admin by going to Tools > Optimize Database and selecting the tables you want to optimize and repair.

For a more thorough clean up, you can use a WordPress database optimization plugin like Advanced Database Cleaner or WP-Optimize. These let you remove unnecessary data and schedule regular database optimization.

Removing database bloat can reduce your backup sizes and speed up SQL queries, shaving crucial milliseconds off your TTFB and page load times.

6. Minimize External HTTP Requests

Each external CSS, JavaScript, image, or font file on your WordPress site requires a separate HTTP request to your server. The more requests, the longer it takes to load the page, increasing TTFB.

While you can‘t avoid external requests altogether, you can minimize them to improve performance. Here are some ways to do that:

• Combine multiple CSS and JavaScript files into single files to reduce the number of requests
• Use inline CSS and JavaScript for small snippets of code
• Defer or delay loading of non-critical scripts until after the main content has loaded
• Host Google fonts and other external resources locally on your server
• Clean up any unnecessary scripts added by your WordPress theme and plugins
• Use CSS sprites to combine small icons and images into a single file

You can use a WordPress minification plugin like Autoptimize or Fast Velocity Minify to automatically combine and minify CSS/JS files. Some performance plugins also let you defer JavaScript loading.

7. Upgrade to the Latest PHP Version

WordPress is written in PHP, which significantly influences your site‘s performance and TTFB. Each PHP version has gotten faster over the years thanks to better memory handling, optimized code execution, and other improvements under the hood.

For example, PHP 8.1 was up to 64% faster in some scenarios compared to the previous PHP 7.4 release.

Unfortunately, nearly 48% of WordPress sites are still using an outdated PHP version below 7.4. If you haven‘t updated your WordPress PHP version recently, you‘re missing out on massive performance gains.

To reduce TTFB and improve WordPress speed, make sure you‘re using the newest supported PHP release, which is PHP 8.2 at the time of writing this article in May 2023. You can ask your hosting provider to update it for you.

If you‘re on managed WordPress hosting, you can choose your PHP version from your hosting account dashboard. Some providers automatically update sites to new PHP versions, so make sure this setting is turned on.

Keep in mind that you should first test your WordPress plugins and themes for compatibility before updating PHP versions. You can use the free PHP Compatibility Checker plugin to scan your site.

8. Configure Caching at the Server Level

Besides page caching at the WordPress level, you can implement caching at the web server level for even faster performance and lower TTFB. The two most common caching extensions for PHP are:

• OPcache – Built into PHP by default, OPcache stores pre-compiled PHP scripts in memory to avoid recompiling them on each request. This can considerably boost PHP performance.
• Redis – An open-source data structure store that can be used as a caching layer for database queries, API calls, and more. Redis is popular in high-traffic WordPress sites.

Some managed WordPress hosts automatically configure OPcache and Redis caching in the background. But if you‘re using a unmanaged VPS or dedicated server, you‘ll need to set these up yourself.

Configuring OPcache is fairly straightforward by editing your php.ini file. The WordPress Codex has a guide on recommended OPcache settings.

Redis is more involved to set up with WordPress. You‘ll need to install the Redis server and PHP extension, then use a plugin like Redis Object Cache to connect WordPress to Redis.

Bonus Tip – Enable GZIP Compression

Enabling GZIP compression is a quick win to reduce TTFB and page load times. GZIP compresses your WordPress HTML, stylesheets, and JavaScript files before sending them over the network.

This reduces the amount of data transfer required and speeds up your site, especially for visitors on slower connections. GZIP can reduce your page size by up to 70% without affecting quality.

Most WordPress hosting providers enable GZIP compression by default. To check if it‘s working for your site, use the free Check GZIP Compression tool.

If GZIP isn‘t enabled, you can turn it on by editing your web server config files or .htaccess file and adding the appropriate code snippets. The WordPress Codex has the code for enabling GZIP on Apache servers.

Some WordPress performance plugins like WP Rocket also have an option to enable GZIP compression if it‘s not already turned on by your host.

Frequently Asked Questions

What is a good TTFB for WordPress?
Google recommends aiming for a TTFB under 200 ms. However, the actual TTFB will vary depending on your WordPress hosting, page type, and content. Generally, anything below 500 ms is considered good, while over 1 second is poor.

How can I test my WordPress site‘s TTFB?
You can use website speed test tools like PageSpeed Insights, GTmetrix, Pingdom, or Chrome DevTools to measure your WordPress TTFB. It‘s best to test multiple pages at different times to get an average TTFB.

Why is my WordPress TTFB so high?
The most common reasons for high TTFB in WordPress are a slow hosting server, lack of caching, unoptimized database queries, too many external HTTP requests, and outdated software versions.

Can I reduce TTFB without changing WordPress hosting?
While using a fast WordPress hosting provider has the biggest impact on reducing TTFB, you can optimize your TTFB on any host using other techniques like page caching, CDN, database optimization, code minification, and more.

Does reducing TTFB improve Google search rankings?
TTFB is not a direct Google ranking factor. However, reducing TTFB improves page load speed and Core Web Vitals scores, which are confirmed Google ranking signals. So optimizing TTFB can indirectly help your WordPress SEO.

Conclusion

Time to first byte is a key metric that sets the foundation for a fast loading WordPress site. By using a quality hosting provider, keeping your WordPress software updated, setting up caching, using a CDN, optimizing your database, and following other best practices, you can significantly reduce TTFB and speed up your site.

This will lead to happier visitors, better conversion rates, and improved search engine rankings. Implement these TTFB optimizations and give your WordPress site the speed boost it deserves.