high-perf-browser — Skills

What it does

TCP three-way handshake adds one full RTT before data transfer begins

TCP slow start limits initial throughput to ~14KB (10 segments) in the first round trip — keep critical resources under this threshold

Upgrade to TLS 1.3: it halves the handshake round trips of TLS 1.2 and enables 0-RTT resumption for returning visitors

Head-of-line blocking in TCP means one lost packet stalls all streams on that connection

Bandwidth-delay product caps in-flight data; high-latency links underutilize bandwidth

HTTP/1.1 allows one outstanding request per TCP connection; browsers open 6 per host as a workaround

HTTP/2 multiplexes unlimited streams over one connection — domain sharding becomes counterproductive

high perf browser

Source

Repository: https://github.com/wondelai/skills

high-perf-browser FAQ

What does the high-perf-browser skill do?

Optimize web performance through network protocols, resource loading, and browser rendering internals. Use when the user mentions "my site is slow", "Core Web Vitals", "HTTP/2 or HTTP/3", "resource hints", "network latency", "render blocking", "TCP/TLS optimization", "service worker", "Cache-Control or caching strategy", or "critical rendering path". Also trigger when diagnosing slow page loads, optimizing time to first byte, choosing between WebSocket and SSE, or reducing bundle sizes. For UI visual performance, see refactoring-ui. For font loading, see web-typography. TCP three-way handshake adds one full RTT before data transfer begins TCP slow start limits initial throughput to ~14KB (10 segments) in the first round trip — keep critical resources under this threshold

How do I install high-perf-browser?

Run: npx -y skills add https://github.com/wondelai/skills --skill high-perf-browser --agent claude-code — the source lives at github.com/wondelai/skills.

Maintain high-perf-browser?

Let people know it's listed here — add the badge (live metrics, light/dark aware) or a plain link to your README or docs.

[high-perf-browser on getagentictools](https://getagentictools.com/skills/wondelai-skills-high-perf-browser?ref=badge)

npx agentictools info skills/wondelai-skills-high-perf-browser

The second line is the CLI lookup for this page — handy in READMEs and docs.