Performance Budget for Blogs and Content Sites
Create a performance budget for content-focused websites — blogs, documentation, and news sites. Optimize for fast text rendering, SEO, and reader engagement with a lean page weight target.
Detailed Explanation
Performance Budget for Blogs and Content Sites
Content sites have a natural advantage for performance: their primary asset is text, which is extremely lightweight. Yet many blogs end up heavier than e-commerce sites due to unoptimized images, heavy CMS themes, and excessive third-party scripts.
Target Budget: 400-600 KB
A well-optimized blog page should weigh 400-600 KB total:
| Category | Budget | Rationale |
|---|---|---|
| HTML | 25 KB | Article markup, minimal boilerplate |
| CSS | 25 KB | Clean typography, simple layout |
| JavaScript | 50 KB | Minimal — navigation, code highlighting |
| Images | 250 KB | 2-3 article images, WebP format |
| Fonts | 40 KB | 1 body font + 1 code font (subset) |
| Other | 10 KB | Minimal analytics |
Why Blogs Get Heavy
Common causes of bloated blog pages:
- WordPress themes — Many themes load 500 KB+ of unused CSS and JS
- Comment systems — Disqus adds 200-400 KB; consider native comments or lazy-load
- Social sharing buttons — Each platform's widget script adds 30-80 KB
- Hero images — Unoptimized 2000px-wide JPEGs at 500 KB each
- Ad networks — Can add 500 KB+ of scripts and iframes
- Syntax highlighting — Libraries like Prism.js are lightweight (10 KB), but some alternatives load 100 KB+
Content-Specific Optimizations
- Server-side rendering — Blogs should be fully rendered HTML, not client-side rendered SPAs
- Static generation — Tools like Next.js, Astro, Hugo, or 11ty generate static HTML for fastest possible delivery
- No JavaScript needed — Most blog features (text rendering, images, navigation) work without JS
- RSS feeds — Provide lightweight alternative for returning readers
SEO Performance Connection
Google uses Core Web Vitals as ranking signals. For content sites competing for organic traffic:
- LCP < 2.5s — The main article text or hero image must render quickly
- FID/INP < 200ms — Minimal JS means minimal interaction delay
- CLS < 0.1 — Reserve space for images with explicit width/height attributes
A lean blog (400 KB) on shared hosting can achieve better Core Web Vitals than a heavy blog (2 MB) on premium CDN.
Static Site Generators
The lightest option for blogs is a static site generator:
| Generator | Output | Typical Page Weight |
|---|---|---|
| Hugo | Static HTML | 50-200 KB |
| Astro | Static + islands | 100-300 KB |
| 11ty | Static HTML | 50-200 KB |
| Next.js (SSG) | Static + hydration | 200-400 KB |
| Gatsby | Static + hydration | 300-600 KB |
Use Case
Blog performance budgets are important for SEO-driven content teams where page speed directly affects search rankings and organic traffic. A tech blog publishing daily articles might set a 500 KB page budget and audit monthly. Documentation sites like developer docs benefit from even stricter budgets (300 KB) since readers visit many pages in a session and cumulative load time affects the overall experience.