JS libraries impact

Performance impact by framework provider.

Field data PhoneDesktopAll Scope All sites Q2 2026 edition · Phone field outcomes
Metric LCP INP CLS
1

At a glance the headline numbers for JS libraries impact

Performance impact by framework provider.

21
Providers ranked
After min-sites filter
272,530
Sites in sample
Combined across all items
1.7s
Best LCP (p75)
Turbo/Hotwire
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
2

The ranking sorted by LCP at p75, fastest first

# Provider LCP p75 Passing Sites
1 Turbo/Hotwire 1.7s 92.1%
521
2 Stimulus/Hotwire 2.0s 87.8%
3,023
3 Polyfill.io 2.2s 83.0%
88
4 Slick Carousel 2.3s 80.6%
14,391
5 jQuery 2.3s 80.1%
129,494
6 Flickity 2.3s 80.0%
5,515
7 Owl Carousel 2.3s 79.2%
8,214
8 Next.js 2.3s 79.7%
3,974
9 Lodash 2.4s 77.9%
25,426
10 Lazysizes 2.4s 78.7%
12,992
11 React 2.4s 77.6%
449
12 Vue.js 2.5s 75.6%
10,740
13 Moment.js 2.5s 75.2%
7,680
14 Ember.js 2.5s 74.7%
115
15 Lit 2.5s 74.4%
10,274
16 Swiper 2.6s 73.9%
29,837
17 GSAP 2.6s 72.2%
4,923
18 Nuxt 2.7s 70.2%
1,199
19 Backbone.js 2.8s 66.9%
1,540
20 Angular 3.1s 59.2%
1,908
21 Ionic 3.9s 42.9%
227
The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
3

Passing LCP per provider which group passes the LCP most often

ProviderSitesPassing LCPp75
Polymer 0% 17 100% 2.1s
Solid 0% 3 100% 2.3s
Qwik 0% 2 100% 1.1s
Turbo/Hotwire 0.3% 521 92% 1.7s
Stimulus/Hotwire 1.6% 3,023 88% 2.0s
Polyfill.io 0% 88 83% 2.2s
Slick Carousel 7.6% 14,391 81% 2.3s
jQuery 68.1% 129,494 80% 2.3s
Flickity 2.9% 5,515 80% 2.3s
Next.js 2.1% 3,974 80% 2.3s
Owl Carousel 4.3% 8,214 79% 2.3s
lazysizes 6.8% 12,992 79% 2.4s
Lodash 13.4% 25,426 78% 2.4s
React 0.2% 449 78% 2.4s
Vue.js 5.6% 10,740 76% 2.5s
Moment.js 4% 7,680 75% 2.5s
Ember.js 0.1% 115 75% 2.5s
Lit 5.4% 10,274 74% 2.5s
Swiper 15.7% 29,837 74% 2.6s
GSAP 2.6% 4,923 72% 2.6s
Nuxt.js 0.6% 1,199 70% 2.7s
Backbone.js 0.8% 1,540 67% 2.8s
Angular 1% 1,908 59% 3.1s
Marko 0% 20 58% 3.3s
Ionic 0.1% 227 43% 3.9s
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good LCP (2.5s at p75) · one value per site

92% of Turbo/Hotwire sites pass LCP. Ionic trails 49 points behind, leaving 57% of its sites failing. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
4

All five vitals at once the whole category without toggling - cell is the pass rate, small number the p75

LCP
INP
CLS
FCP
TTFB
Slick Carousel 7.6%
812.3s
94128ms
870.03
741.8s
531.2s
Moment.js 4%
752.5s
91136ms
850.04
692.0s
521.4s
Next.js 2.1%
802.3s
71216ms
750.10
791.7s
70878ms
Flickity 2.9%
802.3s
96128ms
910.01
731.9s
571.3s
Vue.js 5.6%
762.5s
92144ms
840.04
692.0s
531.3s
Stimulus/Hotwire 1.6%
882.0s
96121ms
920.02
841.6s
77770ms
React 0.2%
782.4s
72233ms
700.16
731.9s
461.2s
GSAP 2.6%
722.6s
97122ms
890.02
652.1s
451.6s
Turbo/Hotwire 0.3%
921.7s
90161ms
950.01
861.4s
72831ms
Lit 5.4%
742.5s
90141ms
840.04
692.0s
561.3s
Ionic 0.1%
433.9s
82182ms
560.24
362.7s
69964ms
Ember.js 0.1%
752.5s
78161ms
750.12
732.0s
671.0s
Polyfill.io 0%
832.2s
93132ms
870.01
731.9s
631.1s
Polymer 0%
1002.1s
67470ms
700.19
901.3s
80776ms
Solid 0%
1002.3s
0260ms
1000.02
1001.8s
501.1s
Swiper 15.7%
742.6s
94129ms
890.02
662.1s
471.5s
jQuery 68.1%
802.3s
95121ms
900.02
721.9s
521.3s
Lodash 13.4%
782.4s
93126ms
870.03
721.9s
601.3s
lazysizes 6.8%
792.4s
93131ms
880.03
721.9s
521.3s
Owl Carousel 4.3%
792.3s
96120ms
840.05
721.9s
501.3s
Nuxt.js 0.6%
702.7s
85172ms
720.12
681.9s
611.0s
Angular 1%
593.1s
75201ms
520.32
642.1s
79711ms
Backbone.js 0.8%
672.8s
92134ms
840.04
582.3s
401.6s
Marko 0%
583.3s
84180ms
890.10
423.1s
112.7s
Qwik 0%
1001.1s
10062ms
1000.02
1001.1s
100359ms
60%95%+ passing Cell: pass rate, small number = p75 · faded rows: under 100 sites

One row per provider, one column per vital - the cell is the share of sites passing, the small number the p75. No toggling needed to see where the category actually differs.

Turbo/Hotwire leads on LCP: 92% of its sites pass. Ionic trails at 43%. computed

The State of Web Vitals · Q2 2026 · 189,915 sites · phone field datacorewebvitals.io/state-of-cwv
Related signals A/B testing (12) → Personalization (6) → E-commerce (16) → CDN (16) → Chrome field data from 189,915 sites, representing millions of real page loads · How we measured