How can I verify that prefetching is working?

Remember, this is different from dns-prefetch, and will download assets in the background as to cache them for future use. To verify a resource is being prefetched, first ensure that your source code contains tags. Then, in Chrome, inspect the page and open up the Network tab. Refresh the page, and filter for your JS files to make things a little easier. Prefetched assets will have a "Priority" of "Low."

by Alex MacArthur 5 (3 reviews)

Better Resource Hints

Name: Better Resource Hints
Rating: 5.0 (3 reviews)
Author: Alex MacArthur

Better Resource Hints will make your WordPress site or application faster and generally more performant by intelligently leveraging resource hints lik …

Better Resource Hints ranks #12,981 among WordPress.org plugins with 200+ active installations, is #692 of 4,499 in the Security category, a 5/5 rating from 3 reviews, and was last updated Feb 12, 2019. Data from WordPress.org, refreshed twice daily — see methodology.

Tested up to WP 5.0.27 (Current: 7.1)

v1.1.3 Current Version v1.1.3

Updated 7 years ago Last Update on 12 Feb, 2019

Refreshed 8 hours ago Last Refreshed on

#692 of 4,499 in Security Top 25% by installs No update in over a year

View on WordPress.org

Rank

#12,981

-2 this week

Active Installs

200+

-4.3%

KW Avg Position

126

0.5 better

Downloads

11.3K

+2 today

Support Resolved

— No change

Rating

100%

Review 5 out of 5

5 (3 reviews)

Next Milestone 300

Total Progress 13%

200+ 300+

1,849

Ranks to Climb

Growth Needed

8,000,000

Active Installs

Pro

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Need 87 more installs to reach 300+

Rank Changes

Current #12,981

Change

Best #

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Active Installs Growth

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Active Installs 0,000,000+

Growth +0.0%

Peak 0,000,000

Downloads Growth

Downloads

Growth

Peak

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Reviews & Ratings

5.0

3 reviews

Overall 100%

3 (100%)

0 (0%)

Security History

Source: WPVulnerability

No known vulnerabilities on record for Better Resource Hints. Checked 1 month ago.

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Plugin Details

Version: 1.1.3
Last Updated: Feb 12, 2019
Requires WP: 4.0+
Tested Up To: 5.0.27
PHP Version: 5.6 or higher
Author: Alex MacArthur

Support & Rating

Rating: ★ ★ ★ ★ ★ 5
Reviews: 3
Support Threads: 0
Resolved: 0%

Keywords

performance prefetch preload resource hints server push

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TL;DR

AI summary of the plugin's readme

This plugin is for WordPress site owners and developers who want to improve page load performance. It solves the problem of WordPress's limited built-in resource hint support by intelligently adding preconnect, preload, prefetch, and server push hints for styles and JavaScript assets.

Preconnect hints for third-party hosts
Preload hints for JavaScript and CSS assets
Prefetch hints for enqueued assets
Server push support
Asynchronous CSS preloading
Filters for customizing generated tags
Preloads footer JavaScript out of the box
Automatic preconnect for existing dns-prefetch hosts

Frequently Asked Questions

Common questions about Better Resource Hints

If someone's using an older browser that doesn't support these hints, nothing will break. The generated tags will just be skipped over and the page will load as normal. The one slight exception to this is preloading CSS. Because the original link tags are completely converted to rel="preload", there would be nothing on which to fall back. To remedy this, a small polyfill is included by this plugin, so you can be at ease.

To start, I'd recommend Google Lighthouse. It's built into Google Chrome and there's also a command line utility available. Beyond that, you could try out something like WebPagetest or a more enterprise solution like SpeedCurve.

First, ensure that your source code contains <link rel="preload" ... > tags. Then, in Chrome, inspect the page and open up the Network tab. Refresh the page, and filter for your JS files to make things a little easier. Preloaded assets will have a "Priority" of "High."

Remember, this is different from dns-prefetch, and will download assets in the background as to cache them for future use. To verify a resource is being prefetched, first ensure that your source code contains <link rel="prefetch" ... > tags. Then, in Chrome, inspect the page and open up the Network tab. Refresh the page, and filter for your JS files to make things a little easier. Prefetched assets will have a "Priority" of "Low."

First, ensure your server is configured to support server push. Then, you can use Chrome's net internals to inspect each HTTP/2 session and which assets are being pushed. Navigate to chrome://net-internals/#http2 in Chrome to view this information.