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.

TechnologyAWCSMonth by month
Super Page Cache

Super Page Cache

Sample
n=10
Coverage
100.0%
Margin
±16.76
The web overall
19.9%

Two figures closer together than ±16.76 are tied, not ranked.

Super Page Cache scores 24.0%24.0%
Super Page Cache: 4 months, no significant change= +12.7
RackCache

RackCache

Sample
n=8
Coverage
100.0%
Margin
±18.74
The web overall
19.9%

Two figures closer together than ±18.74 are tied, not ranked.

RackCache scores 20.0%20.0%
RackCache: 4 months, no significant change= +20.0
NitroPack

NitroPack

Sample
n=19
Coverage
100.0%
Margin
±12.16
The web overall
19.9%

Two figures closer together than ±12.16 are tied, not ranked.

NitroPack scores 19.6%19.6%
NitroPack: 4 months, no significant change= +9.3
Litespeed Cache

Litespeed Cache

Sample
n=496
Coverage
86.6%
Margin
±2.38
The web overall
19.9%

Two figures closer together than ±2.38 are tied, not ranked.

Litespeed Cache scores 19.4%19.4%
Litespeed Cache: 4 months, no significant change= +1.7
Varnish

Varnish

Sample
n=229
Coverage
96.2%
Margin
±3.50
The web overall
19.9%

Two figures closer together than ±3.50 are tied, not ranked.

Varnish scores 17.8%17.8%
Varnish: 4 months, no significant change= −0.1
WP Rocket

WP Rocket

Sample
n=394
Coverage
97.3%
Margin
±2.67
The web overall
19.9%

Two figures closer together than ±2.67 are tied, not ranked.

WP Rocket scores 14.5%14.5%
WP Rocket: 4 months, no significant change= −1.8
WordPress Super Cache

WordPress Super Cache

Sample
n=128
Coverage
97.0%
Margin
±4.68
The web overall
19.9%

Two figures closer together than ±4.68 are tied, not ranked.

WordPress Super Cache scores 13.2%13.2%
WordPress Super Cache: 4 months, no significant change= +2.3
W3 Total Cache

W3 Total Cache

Sample
n=111
Coverage
98.2%
Margin
±5.03
The web overall
19.9%

Two figures closer together than ±5.03 are tied, not ranked.

W3 Total Cache scores 13.1%13.1%
W3 Total Cache: 4 months, no significant change= −0.8
Endurance Page Cache

Endurance Page Cache

Sample
n=51
Coverage
98.1%
Margin
±7.42
The web overall
19.9%

Two figures closer together than ±7.42 are tied, not ranked.

Endurance Page Cache scores 12.0%12.0%
Endurance Page Cache: 4 months, down▼ −7.8
Redis Object Cache

Redis Object Cache

Sample
n=56
Coverage
96.5%
Margin
±7.08
The web overall
19.9%

Two figures closer together than ±7.08 are tied, not ranked.

Redis Object Cache scores 10.3%10.3%
Redis Object Cache: 4 months, no significant change= −5.1
Google PageSpeed

Google PageSpeed

Sample
n=29
Coverage
96.7%
Margin
±9.84
The web overall
19.9%

Two figures closer together than ±9.84 are tied, not ranked.

Google PageSpeed scores 4.5%4.5%
Google PageSpeed: 4 months, no significant change= −6.2
wpCache

wpCache

Sample
n=1
Coverage
100.0%
Margin
±53.00
The web overall
19.9%

Two figures closer together than ±53.00 are tied, not ranked.

wpCache scores 0.0%0.0%
wpCache: 4 months, no significant change= −26.7