The Performance Inequality Gap, 2026 – Infrequently Noted

December 1, 2025

Bar chart titled "The Frontend Sadness Index" comparing web frameworks by Core Web Vitals (CWV) performance using FID (light blue), INP (dark blue), and FID-INP Change (red percentage labels); Astro and Stimulus perform best, while Angular shows the lowest CWV scores and a -4% change, with notable INP drops for Gatsby, Next.js App Router, and Next.js (each at -10%).

Meanwhile, sites are ballooning. The median mobile page is now 2.6 MiB, blowing past the size of DOOM (2.48 MiB) in April. The 75th percentile site is now larger than two copies of DOOM, and P90+ sites are more than 4.5x larger, and sizes at each point have doubled over the past decade. Put another way, the median mobile page is now 70 times larger than the total storage of the computer that landed men on the moon.

Source: The Performance Inequality Gap, 2026 – Infrequently Noted

Alex Russell updates his page in a Quality Gap research for 2026, looking at both:

  1. Where we are at in terms of your median device and networks
  2. The size of the pages that are now commonly being delivered