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
2.0s
Best LCP (p75)
Stimulus/Hotwire
The State of Web Vitals · October 2026 · WordPress sites (63,295) · desktop field datacorewebvitals.io/state-of-cwv
2
The ranking sorted by LCP at p75, fastest first
| # | Provider | LCP p75 | Passing | Sites | |
|---|---|---|---|---|---|
| 1 | Stimulus/Hotwire | 2.0s | 94.7% | 53 | |
| 2 | Angular | 2.0s | 85.0% | 86 | |
| 3 | Ionic | 2.4s | 76.2% | 58 | |
| 4 | jQuery | 2.5s | 75.3% | 60,315 | |
| 5 | Backbone.js | 2.5s | 75.1% | 1,041 | |
| 6 | Vue.js | 2.5s | 74.7% | 4,844 | |
| 7 | Slick Carousel | 2.6s | 74.0% | 5,156 | |
| 8 | Lazysizes | 2.6s | 73.3% | 5,715 | |
| 9 | Flickity | 2.6s | 72.8% | 2,957 | |
| 10 | Owl Carousel | 2.6s | 71.7% | 3,371 | |
| 11 | Lit | 2.6s | 71.3% | 3,786 | |
| 12 | GSAP | 2.6s | 70.9% | 3,245 | |
| 13 | Swiper | 2.7s | 71.0% | 17,874 | |
| 14 | React | 2.8s | 71.0% | 100 | |
| 15 | Moment.js | 2.9s | 64.1% | 2,772 | |
| 16 | Lodash | 2.9s | 64.5% | 9,344 |
The State of Web Vitals · October 2026 · WordPress sites (63,295) · desktop field datacorewebvitals.io/state-of-cwv
3
Passing LCP per provider which group passes the LCP most often
ProviderSitesPassing LCPp75
Stimulus/Hotwire 0.1% 53 2.0s
Next.js 0% 15 1.7s
Ember.js 0.1% 49 1.7s
Angular 0.1% 86 2.0s
Ionic 0.1% 58 2.4s
jQuery 95.3% 60,315 2.5s
Backbone.js 1.6% 1,041 2.5s
Vue.js 7.7% 4,844 2.5s
Slick Carousel 8.1% 5,156 2.6s
lazysizes 9% 5,715 2.6s
Flickity 4.7% 2,957 2.6s
Owl Carousel 5.3% 3,371 2.6s
Lit 6% 3,786 2.6s
Swiper 28.2% 17,874 2.7s
React 0.2% 100 2.8s
GSAP 5.1% 3,245 2.6s
Polyfill.io 0% 18 3.1s
Lodash 14.8% 9,344 2.9s
Moment.js 4.4% 2,772 2.9s
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
75% of jQuery sites pass LCP. Moment.js trails 11 points behind, leaving 36% of its sites failing. 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 LCP: 75% of its sites pass. Moment.js trails at 64%. 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.