From 5b15fb45cfc06b52a61bd4611fb9f278094a01b0 Mon Sep 17 00:00:00 2001
From: Guillaume Chau <guillaume.b.chau@gmail.com>
Date: Tue, 2 Jan 2024 11:29:42 +0100
Subject: [PATCH] perf: cache env utils

---
 packages/core/package.json    |  1 +
 packages/core/src/util/env.ts | 21 +++++++++++++++++++++
 pnpm-lock.yaml                |  3 +++
 3 files changed, 25 insertions(+)

diff --git a/packages/core/package.json b/packages/core/package.json
index aec99b9..05d1ae6 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -53,6 +53,7 @@
     "get-port-please": "^3.1.1",
     "graphql-yoga": "^5.0.2",
     "jiti": "^1.21.0",
+    "lru-cache": "^10.1.0",
     "nanoid": "^5.0.4",
     "pathe": "^1.1.1",
     "perfect-debounce": "^1.0.0",
diff --git a/packages/core/src/util/env.ts b/packages/core/src/util/env.ts
index 21b4763..ecbe512 100644
--- a/packages/core/src/util/env.ts
+++ b/packages/core/src/util/env.ts
@@ -1,18 +1,29 @@
 import process from 'node:process'
 import fs from 'node:fs'
 import path from 'pathe'
+import { LRUCache } from 'lru-cache'
 import { findUp } from './find-up.js'
 
 export function getCwd() {
   return path.resolve(process.env.MOQUERIE_OVERRIDE_CWD ?? process.cwd())
 }
 
+const projectNameCache = new LRUCache<string, string>({
+  max: 100,
+  ttl: 5000,
+})
+
 export function getProjectName(): string {
   const cwd = getCwd()
+  const cached = projectNameCache.get(cwd)
+  if (cached) {
+    return cached
+  }
   const pkgFile = findUp(cwd, ['package.json'])
   if (pkgFile) {
     try {
       const pkg = JSON.parse(fs.readFileSync(pkgFile, 'utf-8'))
+      projectNameCache.set(cwd, pkg.name)
       return pkg.name
     }
     catch (e: any) {
@@ -22,8 +33,18 @@ export function getProjectName(): string {
   throw new Error(`[moquerie] package.json not found looking from ${cwd}`)
 }
 
+const projectHasTypescriptCache = new LRUCache<string, boolean>({
+  max: 100,
+  ttl: 1000 * 60 * 5,
+})
+
 export function projectHasTypescript(): boolean {
   const cwd = getCwd()
+  const cached = projectHasTypescriptCache.get(cwd)
+  if (cached !== undefined) {
+    return cached
+  }
   const tsconfigFile = findUp(cwd, ['tsconfig.json'])
+  projectHasTypescriptCache.set(cwd, !!tsconfigFile)
   return !!tsconfigFile
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3bea0a3..f7f45f2 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -146,6 +146,9 @@ importers:
       jiti:
         specifier: ^1.21.0
         version: 1.21.0
+      lru-cache:
+        specifier: ^10.1.0
+        version: 10.1.0
       nanoid:
         specifier: ^5.0.4
         version: 5.0.4