performance-optimization-rule

performance-optimization-rule is a cursor rule for Cursor from holtwood/awesome-cursorrules-zh. It costs 0 tokens per session (108 once invoked), scanned A, original, MIT.

A set of rules for improving the speed and loading behavior of React and Next.js websites. It covers browser-side code, server-rendered components, loading boundaries, and images.

In plain words
What is it for?
It guides the use of server components, Suspense fallbacks, dynamic loading, WebP images, image dimensions, and lazy loading.
Why use it?
It helps limit work sent to the browser and reduces delays caused by large or poorly loaded components and images.

Cursor rule for Cursor

Written for Cursor: a Cursor rule (.mdc).

Good fit It guides the use of server components, Suspense fallbacks, dynamic loading, WebP images, image dimensions, and lazy loading.

Compare 6 cursor rules from other repositories ↓
Install with agentmods
npx agentmods add rules/holtwood/awesome-cursorrules-zh/performance-optimization-rule
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/holtwood/awesome-cursorrules-zh

Made for: Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for performance-optimization-rule

README.md
[![agentmods](https://agentmods.dev/badge/rules/holtwood/awesome-cursorrules-zh/performance-optimization-rule/github.svg)](https://agentmods.dev/rules/holtwood/awesome-cursorrules-zh/performance-optimization-rule)
Your own site
<a href="https://agentmods.dev/rules/holtwood/awesome-cursorrules-zh/performance-optimization-rule"><img src="https://agentmods.dev/badge/rules/holtwood/awesome-cursorrules-zh/performance-optimization-rule/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for performance-optimization-rule

Your own site · 80×15
<a href="https://agentmods.dev/rules/holtwood/awesome-cursorrules-zh/performance-optimization-rule"><img src="https://agentmods.dev/badge/rules/holtwood/awesome-cursorrules-zh/performance-optimization-rule.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Nothing until a file matches its globs; then the whole rule loads.
When invoked 108 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00108
Opus 5 $0.00000 $0.00054
Sonnet 5 $0.00000 $0.00022
Haiku 4.5 $0.00000 $0.00011

Measured 7d ago against content hash 3934eb3233a7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

performance-optimization-rule scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 7d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

docs/rules/frontend/react/nextjs-typescript/performance-optimization-rule.mdc · 9 lines

What it actually says

  • 最小化 'use client'、'useEffect' 和 'setState';优先使用 React 服务器组件 (RSC)。
  • 将客户端组件包装在带有回退的 Suspense 中。
  • 对非关键组件使用动态加载。
  • 优化图像:使用 WebP 格式,包含大小数据,实现延迟加载。
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 7d ago First seen · 9 lines · 108 tokens per session scan A 3934eb3233a7

Subscribe to this mod's changes

performance-optimization-rule is a cursor rule published in the GitHub repository holtwood/awesome-cursorrules-zh (233 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 108 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.