JS libraries impact WordPress sites
Performance impact by framework provider.
1
At a glance the headline numbers for JS libraries impact
Performance impact by framework provider.
16
Providers ranked
After min-sites filter
120,717
Sites in sample
Combined across all items
62ms
Best INP (p75)
jQuery
The State of Web Vitals · October 2026 · WordPress sites (63,295) · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by INP at p75, fastest first
| # | Provider | INP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | jQuery | 62ms | 99.6% | 60,315 | |
| 2 | Slick Carousel | 62ms | 99.6% | 5,156 | |
| 3 | Lit | 62ms | 99.5% | 3,786 | |
| 4 | Owl Carousel | 62ms | 99.2% | 3,371 | |
| 5 | Backbone.js | 62ms | 100.0% | 1,041 | |
| 6 | Lodash | 62ms | 99.7% | 9,344 | |
| 7 | Swiper | 63ms | 99.7% | 17,874 | |
| 8 | Lazysizes | 63ms | 99.6% | 5,715 | |
| 9 | Flickity | 63ms | 99.9% | 2,957 | |
| 10 | Stimulus/Hotwire | 64ms | 93.8% | 53 | |
| 11 | GSAP | 65ms | 99.7% | 3,245 | |
| 12 | Moment.js | 65ms | 99.9% | 2,772 | |
| 13 | Vue.js | 66ms | 99.4% | 4,844 | |
| 14 | Ionic | 68ms | 100.0% | 58 | |
| 15 | React | 73ms | 100.0% | 100 | |
| 16 | Angular | 75ms | 100.0% | 86 |
The State of Web Vitals · October 2026 · WordPress sites (63,295) · desktop field datacorewebvitals.io/state-of-cwv
3
Passing INP per provider which group passes the INP most often
ProviderSitesPassing INPp75
Backbone.js 1.6% 1,041 62ms
React 0.2% 100 73ms
Angular 0.1% 86 75ms
Ionic 0.1% 58 68ms
Ember.js 0.1% 49 64ms
Polyfill.io 0% 18 69ms
Next.js 0% 15 78ms
Flickity 4.7% 2,957 63ms
Moment.js 4.4% 2,772 65ms
Swiper 28.2% 17,874 63ms
Lodash 14.8% 9,344 62ms
GSAP 5.1% 3,245 65ms
jQuery 95.3% 60,315 62ms
lazysizes 9% 5,715 63ms
Slick Carousel 8.1% 5,156 62ms
Lit 6% 3,786 62ms
Vue.js 7.7% 4,844 66ms
Owl Carousel 5.3% 3,371 62ms
Stimulus/Hotwire 0.1% 53 64ms
Good Needs Improvement Poor Sorted best-passing first · median colored by its own rating · pass = good INP (200ms at p75) · one value per site
No provider stands out: pass rates sit between 99% and 100%. computed
The State of Web Vitals · October 2026 · WordPress sites (63,295) · desktop 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
jQuery 95.3%
752.5s
10062ms
770.10
672.0s
351.7s
Swiper 28.2%
712.7s
10063ms
780.09
632.2s
311.9s
Lodash 14.8%
652.9s
10062ms
730.11
542.5s
232.2s
lazysizes 9%
732.6s
10063ms
760.10
662.1s
321.7s
Slick Carousel 8.1%
742.6s
10062ms
740.11
662.1s
341.8s
Vue.js 7.7%
752.5s
9966ms
750.11
682.1s
351.8s
Lit 6%
712.6s
10062ms
780.09
642.1s
361.7s
Owl Carousel 5.3%
722.6s
9962ms
720.12
642.1s
331.8s
GSAP 5.1%
712.6s
10065ms
820.08
652.1s
351.7s
Flickity 4.7%
732.6s
10063ms
800.08
642.1s
311.9s
Moment.js 4.4%
642.9s
10065ms
740.11
552.5s
262.1s
Backbone.js 1.6%
752.5s
10062ms
750.11
642.1s
331.8s
React 0.2%
712.8s
10073ms
480.17
712.2s
311.7s
Angular 0.1%
852.0s
10075ms
700.12
801.6s
611.4s
Ionic 0.1%
762.4s
10068ms
910.07
482.1s
211.8s
Stimulus/Hotwire 0.1%
952.0s
9464ms
790.08
841.4s
331.1s
Ember.js 0.1%
871.7s
10064ms
830.06
831.4s
541.3s
Polyfill.io 0%
673.1s
10069ms
830.06
332.6s
01.4s
Next.js 0%
891.7s
10078ms
560.17
891.3s
561.1s
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.
jQuery leads on INP: 100% of its sites pass. Owl Carousel trails at 99%. computed
The State of Web Vitals · October 2026 · WordPress sites (63,295) · desktop field datacorewebvitals.io/state-of-cwv
Related signals A/B testing (12) → Personalization (6) → E-commerce (17) → CDN (16) → 203,892 crawled sites with Chrome field data, representing millions of real page loads · How we measured
203,892 crawled sites with Chrome field data, representing millions of real page loads. How we measured.