The 41 Fastest Optimizely Experimentation Ecommerce Sites

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

Rank	Brand	CWV	LCP	INP	CLS
1	Perfume.com	PASS	1.0s	150ms	0.00
2	Seed Heritage	PASS	1.5s	177ms	0.01
3	Banfield Pet Hospital	PASS	1.5s	121ms	0.00
4	PictureFrames.com	PASS	1.5s	111ms	0.06
5	Athleta	PASS	1.9s	176ms	0.05
6	Les Schwab	PASS	1.9s	183ms	0.01
7	Therabody	PASS	2.0s	154ms	0.02
8	Cricut	PASS	2.0s	159ms	0.02
9	AC Lens	PASS	2.2s	97ms	0.00
10	DiscountContactLenses.com	PASS	2.2s	97ms	0.00
11	Birkenstock	PASS	2.2s	170ms	0.08
12	Banana Republic	PASS	2.4s	176ms	0.06
13	BBC Shop	FAIL	1.5s	200ms	0.00
14	Liberty	FAIL	1.6s	262ms	0.05
15	Ex Officio	FAIL	1.7s	163ms	0.16
16	Brooks Brothers	FAIL	1.9s	203ms	0.04
17	Mulberry	FAIL	2.0s	131ms	0.10
18	Yeti	FAIL	2.1s	202ms	0.06
19	buydig.com	FAIL	2.1s	105ms	0.28
20	Philosophy	FAIL	2.2s	207ms	0.03
21	Michaels Stores	FAIL	2.4s	370ms	0.27
22	Rural King	FAIL	2.4s	466ms	0.56
23	Leslie's	FAIL	2.4s	188ms	0.13
24	B&Q	FAIL	2.5s	201ms	0.05
25	Calvin Klein	FAIL	2.5s	254ms	0.17
26	Mavis Discount Tire	FAIL	2.5s	262ms	0.26
27	Motosport	FAIL	2.6s	438ms	0.00
28	LogoSportsWear	FAIL	2.8s	137ms	0.00
29	Ashley HomeStore	FAIL	2.8s	287ms	0.06
30	1800 Petmeds	FAIL	2.8s	179ms	0.10
31	Smartwool	FAIL	2.9s	264ms	0.15
32	Ubisoft	FAIL	3.1s	280ms	0.38
33	Maybelline	FAIL	3.1s	273ms	0.04
34	HarmanKardon	FAIL	3.1s	196ms	0.02
35	R.M.Williams	FAIL	3.3s	401ms	0.07
36	Zara	FAIL	3.5s	634ms	0.16
37	Napapijri	FAIL	3.5s	241ms	0.14
38	Burts Bees	FAIL	3.6s	274ms	0.23
39	altra	FAIL	3.7s	306ms	0.01
40	Designer Shoe Warehouse	FAIL	5.6s	364ms	0.50
41	Flinn Scientific	FAIL	5.9s	145ms	0.38

Slipping down the league? 64labs builds the fastest front ends in ecommerce - Storefront Next launch partner.

Built by 64labs