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
119ms
Best INP (p75)
jQuery
The State of Web Vitals · October 2026 · WordPress sites (63,295) · phone field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by INP at p75, fastest first
| # | Provider | INP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | jQuery | 119ms | 96.7% | 60,315 | |
| 2 | Owl Carousel | 120ms | 97.1% | 3,371 | |
| 3 | GSAP | 121ms | 96.9% | 3,245 | |
| 4 | Slick Carousel | 122ms | 96.5% | 5,156 | |
| 5 | Swiper | 122ms | 96.4% | 17,874 | |
| 6 | Lazysizes | 122ms | 96.1% | 5,715 | |
| 7 | Lit | 122ms | 96.7% | 3,786 | |
| 8 | Stimulus/Hotwire | 124ms | 96.9% | 53 | |
| 9 | Flickity | 124ms | 97.4% | 2,957 | |
| 10 | Lodash | 124ms | 96.4% | 9,344 | |
| 11 | Moment.js | 126ms | 96.0% | 2,772 | |
| 12 | Backbone.js | 127ms | 95.4% | 1,041 | |
| 13 | Ionic | 135ms | 100.0% | 58 | |
| 14 | Vue.js | 137ms | 95.4% | 4,844 | |
| 15 | React | 143ms | 93.3% | 100 | |
| 16 | Angular | 154ms | 93.0% | 86 |
The State of Web Vitals · October 2026 · WordPress sites (63,295) · phone field datacorewebvitals.io/state-of-cwv
3
Passing INP per provider which group passes the INP most often
ProviderSitesPassing INPp75
Ionic 0.1% 58 135ms
Polyfill.io 0% 18 122ms
Flickity 4.7% 2,957 124ms
Owl Carousel 5.3% 3,371 120ms
GSAP 5.1% 3,245 121ms
Stimulus/Hotwire 0.1% 53 124ms
jQuery 95.3% 60,315 119ms
Lit 6% 3,786 122ms
Slick Carousel 8.1% 5,156 122ms
Swiper 28.2% 17,874 122ms
Lodash 14.8% 9,344 124ms
lazysizes 9% 5,715 122ms
Moment.js 4.4% 2,772 126ms
Vue.js 7.7% 4,844 137ms
Backbone.js 1.6% 1,041 127ms
React 0.2% 100 143ms
Angular 0.1% 86 154ms
Next.js 0% 15 149ms
Ember.js 0.1% 49 146ms
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 93% and 97%. computed
The State of Web Vitals · October 2026 · WordPress sites (63,295) · 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
jQuery 95.3%
692.7s
97119ms
900.01
572.3s
311.8s
Swiper 28.2%
633.0s
96122ms
900.02
532.5s
302.0s
Lodash 14.8%
613.0s
96124ms
890.02
492.6s
252.1s
lazysizes 9%
672.8s
96122ms
890.02
572.3s
301.8s
Slick Carousel 8.1%
672.8s
97122ms
880.02
562.4s
321.8s
Vue.js 7.7%
672.8s
95137ms
900.02
562.3s
311.9s
Lit 6%
632.9s
97122ms
870.02
532.4s
301.8s
Owl Carousel 5.3%
642.9s
97120ms
860.03
552.4s
291.8s
GSAP 5.1%
633.0s
97121ms
880.03
542.5s
311.9s
Flickity 4.7%
672.8s
97124ms
930.01
562.4s
281.9s
Moment.js 4.4%
603.0s
96126ms
880.03
492.6s
262.1s
Backbone.js 1.6%
652.8s
95127ms
860.03
522.5s
291.9s
React 0.2%
682.7s
93143ms
860.06
532.1s
361.5s
Angular 0.1%
842.3s
93154ms
870.07
691.9s
491.4s
Ionic 0.1%
583.0s
100135ms
790.07
352.5s
251.9s
Stimulus/Hotwire 0.1%
682.6s
97124ms
920.03
642.5s
431.5s
Ember.js 0.1%
832.0s
87146ms
920.01
781.8s
531.3s
Polyfill.io 0%
703.4s
100122ms
900.00
303.3s
251.5s
Next.js 0%
912.4s
91149ms
910.09
821.7s
551.2s
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: 97% of its sites pass. React trails at 93%. computed
The State of Web Vitals · October 2026 · WordPress sites (63,295) · phone 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.