Updated

Technology · Servers

Priority Hints

wicg.github.io

Priority Hints exposes a mechanism for developers to signal a relative priority for browsers to consider when fetching resources.

Priority Hints belongs toPerformancecategory.

756websites

use it — 29.5% of the 2,560 websites we scanned in the last 12 months

#1of 29

tools in its category seen in our scans (we recognize 69)

159public pages

on UptimeCard — open any of them to see how that site is doing

Used on 29.5% of the websites we scan — and those sites load in 4.2 s, about the same as every other site (4.3 s). Installing it does not make a site noticeably slower.

26.72% of all websites we track run Priority Hints▲ 0.19 points since 20 Sep

At a glance

UptimeCard's own scans and tests of 2,560 websites · refreshed weekly

How Priority Hints sites scoreout of 100 · hover or tap a score for details

51PerformanceLowaverage site: 5089AccessibilityGoodaverage site: 8993Best practicesGoodaverage site: 9392SEOGoodaverage site: 92

Page load time

Loads about as fast as the average site

Priority Hints sites
4.2 s
All sites
4.3 s

Most Priority Hints sites load in 2.9–6.0 s. Home page weight: 2.9 MB vs 3.3 MB for all sites. 144 public sites measured.

Where are they hosted?

Mostly Cloudflare and Amazon Web Services

  • Cloudflare27%
  • Amazon Web Services26%
  • Fastly6%
  • Google Cloud6%
  • Other35%
United States 45%Canada 28%Netherlands 6%

Who uses it?

Software as a Service (SaaS) sites use Priority Hints 1.5× more than average

Technology and Software60%
Business Services14%
Software as a Service (SaaS)1.5× avg9%
Educational Resources4%

Share of 158 classified public sites. “× average” compares with all 961 public sites.

Browser-security check

32% of graded sites pass

13of 41 score B or better

Rates each site’s own security settings, not Priority Hints. 41 public sites graded so far.

How Priority Hints sites are built

Stacks we see most. Tools that tend to run together with Priority Hints on the same websites. The percentage is the share of all 756 Priority Hints sites that run the whole stack.

7 stacks · swipe, drag or use the arrows
#1

Priority Hints + React + Next.js + Sentry

6.3%48 of 756 sites
#2

Priority Hints + WordPress + Yoast SEO + Elementor

4.9%37 of 756 sites
#3

Priority Hints + WordPress + Site Kit + Contact Form 7

2.5%19 of 756 sites
#4

Priority Hints + WordPress + Google Maps

3%23 of 756 sites
#5

Priority Hints + Funding Choices + Google Sign-in

2.8%21 of 756 sites
#6

Priority Hints + React + WordPress

2.5%19 of 756 sites
#7

Priority Hints + React + Funding Choices

2.5%19 of 756 sites

Usually installed alongside

The bigger the bubble, the more of the 756 Priority Hints sites also run the tool. Colour shows what the tool does. Hover or tap a bubble for details.

Google Tag Manager68%Google Analytics65%Facebook Pixel22%Linkedin Insight Tag17%OneTrust18%Yoast SEO18%Microsoft Advertising17%Cart Functionality16%Elementor11%
Tag managerAnalyticsCookie consentSearch visibilityAdvertisingOnline storePage builder

Similar tools in its category

Performance: 69 tools known, 29 seen in our scans

LazySizes115 sitesAlternativeAzure Monitor27 sitesAlternativeGoogle Cloud Trace12 sitesAlternativeTurbo12 sitesAlternativeLozad.js11 sitesAlternativeCloudflare Zaraz10 sitesAlternativeBlitz8 sitesAlternativeEWWW Image Optimizer6 sitesAlternativeCloudflare Rocket Loader29 sitesUsed togetherAutoptimize12 sitesUsed togetherGoogle PageSpeed7 sitesUsed together

How websites combine Priority Hints with other tools

Relationships found on the websites that use it, from the same map status pages show.

Complements another tool 66Integrates with another 9Needs another tool 2

Websites using Priority Hints

756 websites use Priority Hints: 29.5% of the 2,560 websites we scanned in the last 12 months. A selection is shown below.

Scores are out of 100: P Performance · A Accessibility · B Best practices · S SEO. Green 80+, yellow 65–79, orange 50–64, red below 50. The dot shows whether our last scan found the site failing (red) or not (green); Red, amber or blue: an active incident on the site's status page (outage, degraded, maintenance) or a failing scan; amber also means a certificate ending within 30 days. Hover the dot for details.

Questions about Priority Hints

How many websites use Priority Hints?
We found Priority Hints on 756 of the 2,560 websites we scanned in the last 12 months (29.5%). 159 of them have a public status page.
What is Priority Hints often used with?
Among the websites we scan, Priority Hints is often found alongside React (35.3% of its sites), MySQL (32.4% of its sites), WordPress (32.1% of its sites).
What are the alternatives to Priority Hints?
Other performance tools we recognize include LazySizes, Cloudflare Rocket Loader, Azure Monitor, Autoptimize.

Is your website built with Priority Hints?

UptimeCard checks it around the clock, tells you the minute it stops answering, and gives your visitors a status page.

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