The 43 Fastest Optimizely Experimentation Ecommerce Sites

(October 2026) - real-user mobile speed from Google CrUX, 28-day window

Rank	Brand	CWV	LCP	INP	CLS
1	Perfume.com	PASS	1.0s	162ms	0.00
2	Seed Heritage	PASS	1.5s	146ms	0.00
3	Banfield Pet Hospital	PASS	1.5s	136ms	0.00
4	PictureFrames.com	PASS	1.5s	112ms	0.04
5	Expressions	PASS	1.9s	95ms	0.00
6	Cricut	PASS	2.0s	169ms	0.02
7	Athleta	PASS	2.1s	171ms	0.07
8	AC Lens	PASS	2.2s	96ms	0.00
9	Birkenstock	PASS	2.2s	171ms	0.05
10	DiscountContactLenses.com	PASS	2.2s	96ms	0.00
11	Therabody	PASS	2.2s	167ms	0.04
12	LogoSportsWear	PASS	2.4s	137ms	0.00
13	BBC Shop	FAIL	1.3s	205ms	0.00
14	Liberty	FAIL	1.6s	268ms	0.06
15	Ex Officio	FAIL	1.8s	171ms	0.18
16	Philosophy	FAIL	1.9s	206ms	0.03
17	Brooks Brothers	FAIL	1.9s	218ms	0.03
18	Yeti	FAIL	2.0s	205ms	0.06
19	Mulberry	FAIL	2.0s	130ms	0.11
20	Les Schwab	FAIL	2.0s	201ms	0.00
21	Michaels Stores	FAIL	2.2s	362ms	0.18
22	buydig.com	FAIL	2.2s	103ms	0.28
23	1800 Petmeds	FAIL	2.4s	172ms	0.19
24	Calvin Klein	FAIL	2.5s	253ms	0.03
25	Rural King	FAIL	2.5s	496ms	0.75
26	Mavis Discount Tire	FAIL	2.6s	272ms	0.28
27	Banana Republic	FAIL	2.6s	167ms	0.10
28	Ashley HomeStore	FAIL	2.6s	258ms	0.11
29	Leslie's	FAIL	2.6s	191ms	0.13
30	B&Q	FAIL	2.7s	203ms	0.08
31	Smartwool	FAIL	2.8s	253ms	0.15
32	Ubisoft	FAIL	2.8s	253ms	0.33
33	Motosport	FAIL	2.8s	469ms	0.00
34	HarmanKardon	FAIL	3.3s	212ms	0.02
35	Maybelline	FAIL	3.3s	276ms	0.06
36	R.M.Williams	FAIL	3.4s	339ms	0.07
37	Burts Bees	FAIL	3.4s	294ms	0.25
38	altra	FAIL	3.6s	300ms	0.01
39	Napapijri	FAIL	3.6s	220ms	0.02
40	Timberland	FAIL	3.8s	360ms	0.47
41	Zara	FAIL	4.3s	524ms	0.16
42	Designer Shoe Warehouse	FAIL	5.1s	335ms	0.56
43	Flinn Scientific	FAIL	6.1s	162ms	0.38

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