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Technologies · September 2026

Which Performance is readiest for AI agents?

28 measured, averaging 18.1% against 21.0% for the web overall. Tools that measure and optimize site speed

Every one of them, best first

How to read these figures

The colour says what a bar IS, not how it scores: the accent is the one this page is about, grey is everything it is compared with, and the hollow bar is the web overall — the ruler, not a rival. Whether a figure is above or below the rest of the web is in the number and in the arrow beside it.

Every figure here comes from a sample, not from counting every site — so it carries a margin: how much it could move if we had happened to sample different pages. A figure measured on a thousand pages has a wide margin; one measured on a hundred thousand has a narrow one. It matters for one thing: two figures that differ by less than the wider of their margins are not one above the other, they are tied. That is why nothing here has a position number.

Every technology in this category the census can publish a figure for, including the ones above. A technology is here when it has all four dimensions and enough sample to publish; a technology that belongs to two categories is in both.

TechnologyAWCSMonth by month
Instant.Page

Instant.Page

Sample
n=103
Coverage
98.1%
Margin
±5.22
The web overall
21.0%

Two figures closer together than ±5.22 are tied, not ranked.

Instant.Page scores 34.2%34.2%
Instant.Page: 5 months, no significant change= +1.7
Priority Hints

Priority Hints

Sample
n=67,272
Coverage
95.5%
Margin
±0.20
The web overall
21.0%

Two figures closer together than ±0.20 are tied, not ranked.

Priority Hints scores 25.8%25.8%
Priority Hints: 5 months, up▲ +0.4
Cloudflare Zaraz

Cloudflare Zaraz

Sample
n=191
Coverage
97.5%
Margin
±3.83
The web overall
21.0%

Two figures closer together than ±3.83 are tied, not ranked.

Cloudflare Zaraz scores 22.6%22.6%
Cloudflare Zaraz: 5 months, no significant change= +1.4
Google Cloud Trace

Google Cloud Trace

Sample
n=342
Coverage
97.4%
Margin
±2.87
The web overall
21.0%

Two figures closer together than ±2.87 are tied, not ranked.

Google Cloud Trace scores 22.3%22.3%
Google Cloud Trace: 5 months, up▲ +8.0
Perfmatters

Perfmatters

Sample
n=246
Coverage
96.1%
Margin
±3.38
The web overall
21.0%

Two figures closer together than ±3.38 are tied, not ranked.

Perfmatters scores 22.2%22.2%
Perfmatters: 5 months, no significant change= −0.7
LazySizes

LazySizes

Sample
n=10,095
Coverage
96.3%
Margin
±0.53
The web overall
21.0%

Two figures closer together than ±0.53 are tied, not ranked.

LazySizes scores 22.1%22.1%
LazySizes: 5 months, no significant change= +0.3
Cloudflare Rocket Loader

Cloudflare Rocket Loader

Sample
n=1,217
Coverage
97.5%
Margin
±1.52
The web overall
21.0%

Two figures closer together than ±1.52 are tied, not ranked.

Cloudflare Rocket Loader scores 21.3%21.3%
Cloudflare Rocket Loader: 5 months, no significant change= +1.1
Turbolinks
Turbolinks scores 20.4%20.4%
Turbolinks: 5 months, up▲ +7.2
Turbo

Turbo

Sample
n=313
Coverage
97.2%
Margin
±3.00
The web overall
21.0%

Two figures closer together than ±3.00 are tied, not ranked.

Turbo scores 20.2%20.2%
Turbo: 5 months, no significant change= +0.8
Enhanced Responsive Images

Enhanced Responsive Images

Sample
n=103
Coverage
91.1%
Margin
±5.22
The web overall
21.0%

Two figures closer together than ±5.22 are tied, not ranked.

Enhanced Responsive Images scores 19.4%19.4%
Enhanced Responsive Images: 4 months, no significant change= −3.3
Image Prioritizer

Image Prioritizer

Sample
n=100
Coverage
90.1%
Margin
±5.30
The web overall
21.0%

Two figures closer together than ±5.30 are tied, not ranked.

Image Prioritizer scores 18.9%18.9%
Image Prioritizer: 3 months, down▼ −5.3
Speculative Loading

Speculative Loading

Sample
n=166
Coverage
93.8%
Margin
±4.11
The web overall
21.0%

Two figures closer together than ±4.11 are tied, not ranked.

Speculative Loading scores 18.7%18.7%
Speculative Loading: 5 months, no significant change= +0.7
Embed Optimizer

Embed Optimizer

Sample
n=115
Coverage
90.5%
Margin
±4.94
The web overall
21.0%

Two figures closer together than ±4.94 are tied, not ranked.

Embed Optimizer scores 18.4%18.4%
Embed Optimizer: 5 months, no significant change= −1.1
NitroPack

NitroPack

Sample
n=214
Coverage
97.7%
Margin
±3.62
The web overall
21.0%

Two figures closer together than ±3.62 are tied, not ranked.

NitroPack scores 18.2%18.2%
NitroPack: 5 months, up▲ +4.2
Optimization Detective

Optimization Detective

Sample
n=136
Coverage
91.3%
Margin
±4.54
The web overall
21.0%

Two figures closer together than ±4.54 are tied, not ranked.

Optimization Detective scores 18.1%18.1%
Optimization Detective: 5 months, no significant change= −2.1
Modern Image Formats

Modern Image Formats

Sample
n=324
Coverage
92.8%
Margin
±2.94
The web overall
21.0%

Two figures closer together than ±2.94 are tied, not ranked.

Modern Image Formats scores 18.0%18.0%
Modern Image Formats: 5 months, no significant change= −2.0
Lozad.js

Lozad.js

Sample
n=457
Coverage
96.8%
Margin
±2.48
The web overall
21.0%

Two figures closer together than ±2.48 are tied, not ranked.

Lozad.js scores 17.8%17.8%
Lozad.js: 5 months, no significant change= +0.0
Image Placeholders

Image Placeholders

Sample
n=158
Coverage
91.9%
Margin
±4.22
The web overall
21.0%

Two figures closer together than ±4.22 are tied, not ranked.

Image Placeholders scores 17.4%17.4%
Image Placeholders: 5 months, no significant change= +1.4
Google PageSpeed

Google PageSpeed

Sample
n=401
Coverage
98.3%
Margin
±2.65
The web overall
21.0%

Two figures closer together than ±2.65 are tied, not ranked.

Google PageSpeed scores 17.0%17.0%
Google PageSpeed: 5 months, up▲ +3.7
Autoptimize

Autoptimize

Sample
n=1,436
Coverage
97.0%
Margin
±1.40
The web overall
21.0%

Two figures closer together than ±1.40 are tied, not ranked.

Autoptimize scores 16.7%16.7%
Autoptimize: 5 months, no significant change= +0.9
Azure Monitor

Azure Monitor

Sample
n=268
Coverage
98.5%
Margin
±3.24
The web overall
21.0%

Two figures closer together than ±3.24 are tied, not ranked.

Azure Monitor scores 16.6%16.6%
Azure Monitor: 5 months, no significant change= +2.4
EWWW Image Optimizer

EWWW Image Optimizer

Sample
n=930
Coverage
96.1%
Margin
±1.74
The web overall
21.0%

Two figures closer together than ±1.74 are tied, not ranked.

EWWW Image Optimizer scores 15.7%15.7%
EWWW Image Optimizer: 5 months, down▼ −3.0
Performance Lab

Performance Lab

Sample
n=454
Coverage
94.0%
Margin
±2.49
The web overall
21.0%

Two figures closer together than ±2.49 are tied, not ranked.

Performance Lab scores 15.6%15.6%
Performance Lab: 5 months, no significant change= −0.9
WP-Optimize

WP-Optimize

Sample
n=910
Coverage
96.6%
Margin
±1.76
The web overall
21.0%

Two figures closer together than ±1.76 are tied, not ranked.

WP-Optimize scores 14.1%14.1%
WP-Optimize: 5 months, no significant change= +0.4
a3 Lazy Load

a3 Lazy Load

Sample
n=165
Coverage
97.1%
Margin
±4.13
The web overall
21.0%

Two figures closer together than ±4.13 are tied, not ranked.

a3 Lazy Load scores 13.4%13.4%
a3 Lazy Load: 5 months, no significant change= +2.0
WP Fastest Cache

WP Fastest Cache

Sample
n=750
Coverage
95.9%
Margin
±1.94
The web overall
21.0%

Two figures closer together than ±1.94 are tied, not ranked.

WP Fastest Cache scores 13.3%13.3%
WP Fastest Cache: 5 months, no significant change= −0.6
LazySizes unveilhooks plugin

LazySizes unveilhooks plugin

Sample
n=213
Coverage
98.6%
Margin
±3.63
The web overall
21.0%

Two figures closer together than ±3.63 are tied, not ranked.

LazySizes unveilhooks plugin scores 7.8%7.8%
LazySizes unveilhooks plugin: 5 months, up▲ +4.1
Intersection Observer

Intersection Observer

Sample
n=141
Coverage
100.0%
Margin
±4.46
The web overall
21.0%

Two figures closer together than ±4.46 are tied, not ranked.

Intersection Observer scores 0.5%0.5%
Intersection Observer: 5 months, no significant change= −1.3