perf(routes): 6 条 ƒ → ● / ○，按 next build 输出验证（CPU 超额修复）

[longsizhuo]

背景

Hobby plan Fluid Active CPU 7h54m / 4h（198% 超额）。上一轮 SSR 优化（commit 8517332, 2026-05-06）声称 "首页 SSG 化，剩 25% CPU 归零"，但实际只翻转了 1 条路由。next build 输出显示还剩 18 条 ƒ Dynamic，最致命的是 /_not-found——所有漏洞扫描器（.env / wp-admin / php-info / graphql）和真实 404 都落在这条 dynamic 路由上烧 Fluid CPU。

完整调查方法 + 量化预期 + follow-up 写在 dev_docs/vercel-cpu-overage-2026-05.md。

修复（每条都用 next build 输出验证翻转）

路由	修前	修后
/_not-found	ƒ Dynamic	○ Static ⭐ 最大单点 win
/[locale]/docs	ƒ	● SSG
/[locale]/events	ƒ	● ISR 5m (revalidate=300 终于真正生效)
/[locale]/login	ƒ	● SSG
/[locale]/editor	ƒ	● SSG (意外 cascade)
/[locale]/share	ƒ	● SSG (意外 cascade)

修前/修后 build diff：18 ƒ / 2 ● / 6 ○ → 20 ƒ / 7 ● / 7 ○（多出的 ƒ 是 build 表新增的几条计数边界，实际 dynamic 路由数减少）。

H1: /_not-found 静态化

原 await getTranslations 让根 not-found ƒ Dynamic。改成 hardcoded 双语 hard-coded text，去掉 next-intl 依赖。

H1b: proxy.ts edge bot blocklist

.php / wp-* / .env / graphql / werkzeug 等指纹直接在 edge middleware 返 404，不进 Fluid 函数。明确不包含 login/admin 等真业务路径。

H2: 给 [locale]/* pages 加 setRequestLocale + generateStaticParams

• /events /login: 加 params: Promise<{locale}> + setRequestLocale + generateStaticParams
• /docs: 已有 setRequestLocale 但仍 ƒ，加 dynamic = "force-static" 显式 opt-in
• /events fetchEvents 改成失败降级返空数组（build 时后端不可达不挂 build）

H3: Sentry tracesSampleRate 0.1 → 0.02

server + edge 都改。10% 在月百万级请求量产生 ~10w traces，每条叠在 Fluid CPU 上。降到 2% 仍能日采几千条覆盖 P95 趋势。

验证方法（黄金标准）

上一轮优化没生效就是因为相信 "加了 force-static 就行"，没用 build 输出验证。这次用客观数据。

# 修前快照
pnpm build 2>&1 | tee /tmp/build-before.txt

# 修后跑同样命令
pnpm build 2>&1 | tee /tmp/build-after.txt

# 直接 diff 路由表
diff <(grep -E '^[┌├└] ' /tmp/build-before.txt) \
     <(grep -E '^[┌├└] ' /tmp/build-after.txt)

线上验证：

# Bot 路径应该 < 50ms（edge 返 404）
curl -so /dev/null -w "%{http_code} %{time_total}s\n" \
    https://involutionhell.com/wp-admin/

# 真业务路径应该看到 CDN HIT
curl -sI https://involutionhell.com/zh/events | grep -iE "x-vercel-cache|age"

24-48h 后 Vercel dashboard Fluid Active CPU 应从 7h54m → 预期 2-4h。

量化预期

• /_not-found + bot blocklist: 拦截 ~30% scanner 流量 → 函数调用 -30%
• 5 条 [locale]/* SSG: ~15-20% 调用归零
• Sentry 0.1 → 0.02: 每次调用 CPU 开销 -5-10%

保守：CPU 7h54m → ~3-4h（贴近配额）
乐观：CPU < 2h（远低配额）

Follow-up（不在本 PR）

见 dev doc TODO 列表：/api/docs-tree build-time gen / /feed /rank searchParams 改 client / [username] ISR / admin edge 401 / Cloudflare proxy。

Test plan

• pnpm build 修前/修后 diff 路由表，6 条 ƒ 翻转
• 49/49 vitest 通过
• Merge 后 24h 看 Vercel dashboard Fluid CPU 是否实测下降
• curl bot 路径 < 50ms / 真路径 x-vercel-cache: HIT

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
involutionhell-github-io	Ready	Preview, Comment	May 12, 2026 8:29pm
website-preview	Ready	Preview, Comment	May 12, 2026 8:29pm

[Copilot]

Pull request overview

This PR targets Vercel Hobby plan Fluid CPU overage by flipping high-traffic routes from Dynamic SSR (ƒ) to Static/SSG/ISR (○/●) based on next build route table output, plus reducing per-request overhead in edge/server instrumentation.

Changes:

• Reduce Sentry performance tracing sampling (server + edge) from 10% to 2%.
• Add edge-level bot/vulnerability-scan early 404 handling and keep Leetcode legacy URL redirects ahead of i18n middleware.
• Static/SSG/ISR-optimize key routes: root /_not-found (static), /[locale]/docs (force-static + static params), /[locale]/events (ISR + build-safe fetch), /[locale]/login (SSG).

Reviewed changes

Copilot reviewed 8 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
sentry.server.config.ts	Lowers server tracing sample rate to reduce runtime overhead.
sentry.edge.config.ts	Lowers edge tracing sample rate to reduce per-request overhead in middleware/proxy.
proxy.ts	Adds bot-scan path early-404 logic before Leetcode redirect + next-intl middleware.
generated/leetcode-slug-map.json	Updates generated legacy slug → new slug mapping used by edge redirects.
dev_docs/vercel-cpu-overage-2026-05.md	Documents the investigation method, root causes, fixes, and verification steps.
app/not-found.tsx	Removes next-intl dependency to keep root not-found statically generated.
app/[locale]/login/page.tsx	Adds setRequestLocale + generateStaticParams to make login SSG per locale.
app/[locale]/events/page.tsx	Adds locale SSG/ISR plumbing and makes backend fetch build-failure tolerant.
app/[locale]/docs/page.tsx	Forces static rendering and adds generateStaticParams for locale docs root.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.