Cursor rule

1---
2alwaysApply: false
3---
4 
5# Sections
6 
7This file defines all sections, their ordering, impact levels, and descriptions.
8The section ID (in parentheses) is the filename prefix used to group rules.
9 
10---
11 
12## 1. Eliminating Waterfalls (async)
13 
14**Impact:** CRITICAL  
15**Description:** Waterfalls are the #1 performance killer. Each sequential await adds full network latency. Eliminating them yields the largest gains.
16 
17## 2. Bundle Size Optimization (bundle)
18 
19**Impact:** CRITICAL  
20**Description:** Reducing initial bundle size improves Time to Interactive and Largest Contentful Paint.
21 
22## 3. Server-Side Performance (server)
23 
24**Impact:** HIGH  
25**Description:** Optimizing server-side rendering and data fetching eliminates server-side waterfalls and reduces response times.
26 
27## 4. Client-Side Data Fetching (client)
28 
29**Impact:** MEDIUM-HIGH  
30**Description:** Automatic deduplication and efficient data fetching patterns reduce redundant network requests.
31 
32## 5. Re-render Optimization (rerender)
33 
34**Impact:** MEDIUM  
35**Description:** Reducing unnecessary re-renders minimizes wasted computation and improves UI responsiveness.
36 
37## 6. Rendering Performance (rendering)
38 
39**Impact:** MEDIUM  
40**Description:** Optimizing the rendering process reduces the work the browser needs to do.
41 
42## 7. JavaScript Performance (js)
43 
44**Impact:** LOW-MEDIUM  
45**Description:** Micro-optimizations for hot paths can add up to meaningful improvements.
46 
47## 8. Advanced Patterns (advanced)
48 
49**Impact:** LOW  
50**Description:** Advanced patterns for specific cases that require careful implementation.
51