refactor(topics): 멀티 에이전트용 지식 재편 — _Common(공통 기본기) + Domain_* 구조
에이전트 8종(대화형/프로그래머 C·S/디자이너/설계자/기획자/QA/PD/PM)에게 [공통 기본 능력 + 롤별 Specialty] 2층으로 지식을 주입하기 위한 재분류. 문서 내용·포맷은 무수정, 폴더 이동만 (6,372개 문서 수 보존 확인). - Topic_Programming → Domain_Programming (내부 구조 보존) - Topic_Graphic → Domain_Design - Topic_Business → Domain_Product - Topic_General → Domain_General - _Common 신설: Math(구 Topic_Math_Specialty), Reasoning(구 General/From_Thinking & Reasoning), Reasoning_Creativity(구 General/From_창의성), Communication(Poetic_Blog_Writing + From_writing) - 타 도메인의 From_* 폴더는 유지 (출처 표기일 뿐, 이미 도메인에 맞게 분류된 문서) - 빈 폴더 정리 (memory/procedures) - 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Antigravity Agent
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---
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id: wiki-2026-0508-network-latency-optimization
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title: Network Latency Optimization
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category: 10_Wiki/Topics
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status: verified
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canonical_id: self
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aliases: [Latency Optimization, Network Performance, Low Latency]
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duplicate_of: none
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source_trust_level: A
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confidence_score: 0.9
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verification_status: applied
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tags: [network, latency, performance, http3, cdn]
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raw_sources: []
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last_reinforced: 2026-05-10
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github_commit: pending
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tech_stack:
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language: any
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framework: http3-quic
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---
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# Network Latency Optimization
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## 매 한 줄
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> **"매 latency 의 reduce = round trips 의 reduce + distance 의 reduce + bytes 의 reduce"**. 매 RTT 의 fundamental constraint (light-speed). 2026 toolkit: HTTP/3 (QUIC), edge compute, brotli, prefetch, 0-RTT TLS.
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## 매 핵심
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### 매 latency budget (sources)
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- **Propagation**: 매 distance / c. NYC↔LA ~70ms RTT minimum.
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- **Transmission**: 매 bytes / bandwidth.
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- **Queueing**: router buffer / congestion.
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- **Processing**: server compute, TLS handshake, DNS.
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### 매 lever
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- **Fewer RTTs**: HTTP/2/3 multiplex, 0-RTT TLS, connection reuse.
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- **Closer**: CDN, edge compute, anycast.
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- **Smaller**: brotli, image optimize, tree-shake.
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- **Parallel**: HTTP/2 streams, preload, prefetch.
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- **Predictive**: speculation rules, prerender.
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### 매 응용
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1. SaaS dashboard: edge auth + cached fragments.
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2. Video stream: anycast + adaptive bitrate.
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3. Realtime game: UDP + WebTransport.
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## 💻 패턴
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### HTTP/3 (Cloudflare / nginx)
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```nginx
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# nginx 1.25+
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listen 443 quic reuseport;
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listen 443 ssl;
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http3 on;
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add_header alt-svc 'h3=":443"; ma=86400';
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ssl_protocols TLSv1.3;
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ssl_early_data on; # 0-RTT
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```
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### Resource hints
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```html
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<link rel="preconnect" href="https://api.shop">
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<link rel="dns-prefetch" href="https://cdn.shop">
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<link rel="preload" as="font" href="/fonts/Inter.woff2" crossorigin>
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<link rel="modulepreload" href="/_next/static/chunks/main.js">
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```
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### Speculation rules (Chrome 121+)
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```html
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<script type="speculationrules">
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{
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"prerender": [{ "where": { "href_matches": "/products/*" }, "eagerness": "moderate" }],
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"prefetch": [{ "where": { "href_matches": "/*" }, "eagerness": "conservative" }]
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}
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</script>
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```
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### Brotli compression
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```nginx
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brotli on;
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brotli_comp_level 6;
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brotli_types text/html text/css application/javascript application/json image/svg+xml;
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```
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### Edge function (Cloudflare Worker)
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```typescript
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export default {
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async fetch(req: Request, env: Env, ctx: ExecutionContext) {
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const cache = caches.default;
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let res = await cache.match(req);
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if (res) return res;
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res = await fetch(req, { cf: { cacheTtl: 300, cacheEverything: true } });
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res = new Response(res.body, res);
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res.headers.set("cache-control", "public, max-age=300, s-maxage=600");
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ctx.waitUntil(cache.put(req, res.clone()));
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return res;
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},
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};
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```
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### Connection coalescing
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```typescript
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// keep-alive pool, single host
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import { Agent } from "undici";
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const agent = new Agent({
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keepAliveTimeout: 30_000,
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keepAliveMaxTimeout: 60_000,
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connections: 50,
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});
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await fetch(url, { dispatcher: agent });
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```
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### TCP_NODELAY (Node)
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```javascript
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const net = require("net");
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const socket = net.createConnection({ host, port });
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socket.setNoDelay(true); // disable Nagle for latency-sensitive
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```
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### Service Worker stale-while-revalidate
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```javascript
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// sw.js
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self.addEventListener("fetch", (e) => {
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e.respondWith((async () => {
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const cache = await caches.open("v1");
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const cached = await cache.match(e.request);
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const network = fetch(e.request).then((r) => {
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cache.put(e.request, r.clone());
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return r;
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});
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return cached ?? network;
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})());
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});
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```
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### DNS over HTTPS (faster + secure)
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```typescript
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const r = await fetch("https://cloudflare-dns.com/dns-query?name=api.shop&type=A", {
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headers: { accept: "application/dns-json" },
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});
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```
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### Latency budget telemetry
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```typescript
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const obs = new PerformanceObserver((list) => {
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for (const e of list.getEntries() as PerformanceNavigationTiming[]) {
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console.log({
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ttfb: e.responseStart - e.requestStart,
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dns: e.domainLookupEnd - e.domainLookupStart,
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tls: e.connectEnd - e.secureConnectionStart,
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lcp: e.loadEventEnd - e.startTime,
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});
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}
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});
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obs.observe({ type: "navigation", buffered: true });
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```
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## 매 결정 기준
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| 상황 | Approach |
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|---|---|
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| Static content, global | CDN + brotli + cache |
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| Personalized SaaS | Edge function + KV cache |
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| API-heavy mobile | HTTP/3 + connection pool + protobuf |
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| Realtime (game/voice) | UDP / WebTransport / QUIC |
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**기본값**: HTTP/3 + CDN + brotli + resource hints + edge personalization.
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## 🔗 Graph
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- 부모: [[Web-Performance]]
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- 변형: [[Throughput-Optimization]]
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- 응용: [[CDN]] · [[Edge Computing|Edge-Computing]]
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- Adjacent: [[Compression]] · [[Web-Vitals]]
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## 🤖 LLM 활용
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**언제**: 매 waterfall analysis 의 explain, resource hint 의 propose, header config 의 audit.
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**언제 X**: 매 capacity planning, BGP / peering decision — network-eng domain.
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## ❌ 안티패턴
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- **Lots of small requests**: HTTP/1.1 era 6-connection limit. Use HTTP/2/3 multiplex.
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- **No CDN for static**: 매 origin hit 의 매 user. 100ms+ avoidable.
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- **TLS 1.2 + RSA**: 매 slow handshake. Use TLS 1.3 + ECDSA.
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- **Synchronous waterfall**: A → B → C 의 sequential await. Parallelize.
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## 🧪 검증 / 중복
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- Verified (web.dev, Cloudflare engineering blog, "High Performance Browser Networking" by Grigorik).
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- 신뢰도 A.
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## 🕓 Changelog
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| 날짜 | 변경 |
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|---|---|
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| 2026-05-08 | Phase 1 |
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| 2026-05-10 | Manual cleanup — HTTP/3 + edge + resource hints latency patterns |
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