The 44 Fastest Optimizely Experimentation Ecommerce Sites

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

Rank	Brand	CWV	LCP	INP	CLS
1	Perfume.com	PASS	1.0s	152ms	0.00
2	Seed Heritage	PASS	1.4s	178ms	0.01
3	Banfield Pet Hospital	PASS	1.5s	129ms	0.00
4	PictureFrames.com	PASS	1.5s	112ms	0.06
5	Les Schwab	PASS	2.0s	187ms	0.01
6	Cricut	PASS	2.0s	162ms	0.02
7	Therabody	PASS	2.0s	149ms	0.02
8	Athleta	PASS	2.1s	171ms	0.05
9	Birkenstock	PASS	2.3s	171ms	0.09
10	AC Lens	PASS	2.3s	99ms	0.00
11	DiscountContactLenses.com	PASS	2.3s	99ms	0.00
12	LogoSportsWear	PASS	2.4s	129ms	0.00
13	BBC Shop	FAIL	1.4s	211ms	0.00
14	Liberty	FAIL	1.6s	272ms	0.06
15	Ex Officio	FAIL	1.8s	167ms	0.17
16	Brooks Brothers	FAIL	1.8s	204ms	0.03
17	Yeti	FAIL	1.9s	204ms	0.06
18	Mulberry	FAIL	2.0s	135ms	0.11
19	Philosophy	FAIL	2.0s	211ms	0.04
20	buydig.com	FAIL	2.1s	111ms	0.28
21	Michaels Stores	FAIL	2.3s	413ms	0.27
22	Leslie's	FAIL	2.5s	190ms	0.13
23	Banana Republic	FAIL	2.5s	179ms	0.11
24	Rural King	FAIL	2.5s	488ms	0.64
25	Calvin Klein	FAIL	2.6s	258ms	0.14
26	B&Q	FAIL	2.6s	202ms	0.06
27	Mavis Discount Tire	FAIL	2.6s	256ms	0.27
28	Motosport	FAIL	2.7s	438ms	0.00
29	Ashley HomeStore	FAIL	2.7s	287ms	0.06
30	1800 Petmeds	FAIL	2.9s	179ms	0.10
31	Ubisoft	FAIL	2.9s	275ms	0.32
32	Smartwool	FAIL	2.9s	266ms	0.15
33	L'Oreal USA	FAIL	3.0s	306ms	0.05
34	HarmanKardon	FAIL	3.1s	205ms	0.03
35	Maybelline	FAIL	3.1s	273ms	0.03
36	R.M.Williams	FAIL	3.2s	348ms	0.07
37	Timberland	FAIL	3.4s	361ms	0.49
38	Burts Bees	FAIL	3.5s	281ms	0.24
39	Zara	FAIL	3.5s	587ms	0.16
40	altra	FAIL	3.8s	327ms	0.00
41	Napapijri	FAIL	3.8s	266ms	0.02
42	LG	FAIL	4.9s	1053ms	0.19
43	Flinn Scientific	FAIL	5.5s	129ms	0.33
44	Designer Shoe Warehouse	FAIL	5.5s	372ms	0.52

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

Built by 64labs