Personalization impact

Performance impact by personalization provider.

Field data PhoneDesktopAll Scope All sites Q1 2026 edition · All devices field outcomes
Metric LCP INP CLS
1

At a glance the headline numbers for Personalization impact

Performance impact by personalization provider.

2
Providers ranked
After min-sites filter
8,167
Sites in sample
Combined across all items
113ms
Best INP (p75)
Elfsight
The State of Web Vitals · Q1 2026 · 94,910 sites · all devices field datacorewebvitals.io/state-of-cwv
2

The ranking sorted by INP at p75, fastest first

# Provider INP p75 Passing Sites
1 Elfsight 113ms 96.6%
1,231
2 Algolia Recommend 114ms 95.2%
6,936
The State of Web Vitals · Q1 2026 · 94,910 sites · all devices field datacorewebvitals.io/state-of-cwv
3

Passing INP per provider which group passes the INP most often

ProviderSitesPassing INPp75
Klevu 0% 17 100% 155ms
Elfsight 1.3% 1,231 97% 113ms
Algolia Recommend 7.3% 6,936 95% 114ms
Nosto 0% 30 90% 170ms
Dynamic Yield 0% 37 57% 297ms
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 95% and 97%. computed

The State of Web Vitals · Q1 2026 · 94,910 sites · 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
Algolia Recommend 7.3%
842.1s
95114ms
870.04
781.7s
621.1s
Elfsight 1.3%
822.2s
97113ms
850.05
781.7s
601.2s
Dynamic Yield 0%
662.9s
57297ms
630.18
662.1s
541.2s
Nosto 0%
802.3s
90170ms
770.10
801.5s
571.1s
Klevu 0%
772.5s
100155ms
590.21
771.6s
59962ms
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.

Elfsight leads on INP: 97% of its sites pass. Algolia Recommend trails at 95%. computed

The State of Web Vitals · Q1 2026 · 94,910 sites · all devices field datacorewebvitals.io/state-of-cwv
Related signals JS libraries (22) → Tag managers (8) → A/B testing (10) → Chat & messaging (16) → Chrome field data from 94,910 sites, representing millions of real page loads · How we measured