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
2.3s
Best LCP (p75)
Angular
The State of Web Vitals · October 2026 · WordPress sites (63,295) · all devices field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by LCP at p75, fastest first
| # | Provider | LCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Angular | 2.3s | 79.8% | 86 | |
| 2 | jQuery | 2.7s | 69.4% | 60,315 | |
| 3 | Slick Carousel | 2.7s | 69.3% | 5,156 | |
| 4 | Stimulus/Hotwire | 2.7s | 64.7% | 53 | |
| 5 | Vue.js | 2.8s | 67.7% | 4,844 | |
| 6 | React | 2.8s | 62.8% | 100 | |
| 7 | Flickity | 2.8s | 66.2% | 2,957 | |
| 8 | Backbone.js | 2.8s | 66.3% | 1,041 | |
| 9 | Lazysizes | 2.8s | 67.2% | 5,715 | |
| 10 | Lit | 2.8s | 65.4% | 3,786 | |
| 11 | Owl Carousel | 2.8s | 65.3% | 3,371 | |
| 12 | Swiper | 3.0s | 63.4% | 17,874 | |
| 13 | GSAP | 3.0s | 62.8% | 3,245 | |
| 14 | Ionic | 3.0s | 60.7% | 58 | |
| 15 | Lodash | 3.1s | 60.4% | 9,344 | |
| 16 | Moment.js | 3.1s | 58.8% | 2,772 |
The State of Web Vitals · October 2026 · WordPress sites (63,295) · all devices field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Next.js 0% 15 2.2s
Ember.js 0.1% 49 2.1s
Angular 0.1% 86 2.3s
jQuery 95.3% 60,315 2.7s
Slick Carousel 8.1% 5,156 2.7s
Vue.js 7.7% 4,844 2.8s
lazysizes 9% 5,715 2.8s
Backbone.js 1.6% 1,041 2.8s
Flickity 4.7% 2,957 2.8s
Lit 6% 3,786 2.8s
Owl Carousel 5.3% 3,371 2.8s
Stimulus/Hotwire 0.1% 53 2.7s
Swiper 28.2% 17,874 3.0s
GSAP 5.1% 3,245 3.0s
React 0.2% 100 2.8s
Ionic 0.1% 58 3.0s
Lodash 14.8% 9,344 3.1s
Moment.js 4.4% 2,772 3.1s
Polyfill.io 0% 18 3.4s
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
69% of jQuery sites pass LCP. Moment.js trails 10 points behind, leaving 41% of its sites failing. computed
The State of Web Vitals · October 2026 · WordPress sites (63,295) · all devices 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
98104ms
890.03
582.3s
301.9s
Swiper 28.2%
633.0s
98107ms
890.03
532.5s
282.0s
Lodash 14.8%
603.1s
98107ms
870.05
482.6s
232.2s
lazysizes 9%
672.8s
98106ms
870.05
572.4s
281.9s
Slick Carousel 8.1%
692.7s
98104ms
860.05
592.3s
321.8s
Vue.js 7.7%
682.8s
97124ms
890.03
582.3s
311.9s
Lit 6%
652.8s
98105ms
860.04
562.4s
311.8s
Owl Carousel 5.3%
652.8s
98105ms
840.06
562.4s
291.9s
GSAP 5.1%
633.0s
99106ms
890.04
542.5s
292.0s
Flickity 4.7%
662.8s
99108ms
910.02
552.4s
262.0s
Moment.js 4.4%
593.1s
98111ms
850.05
482.7s
252.1s
Backbone.js 1.6%
662.8s
98108ms
860.05
542.4s
301.9s
React 0.2%
632.8s
99117ms
780.09
522.3s
241.8s
Angular 0.1%
802.3s
96138ms
820.08
701.9s
491.4s
Ionic 0.1%
613.0s
100111ms
840.05
472.6s
281.9s
Stimulus/Hotwire 0.1%
652.7s
98117ms
900.04
642.5s
311.8s
Ember.js 0.1%
812.1s
93121ms
900.03
711.9s
521.4s
Polyfill.io 0%
593.4s
100109ms
820.02
413.0s
271.5s
Next.js 0%
872.2s
93146ms
800.10
801.6s
531.2s
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 LCP: 69% of its sites pass. Moment.js trails at 59%. computed
The State of Web Vitals · October 2026 · WordPress sites (63,295) · all devices 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.