3. Build Time Optimization

# Aktifkan build timing di Xcode
defaults write com.apple.dt.Xcode ShowBuildOperationDuration YES

# Setelah build, waktu muncul di activity bar Xcode

# Cek function compilation time (Swift)
# Di Build Settings → Swift Compiler - Custom Flags → Other Swift Flags:
# -Xfrontend -warn-long-function-bodies=100
# -Xfrontend -warn-long-expression-type-checking=100
# (angka = milliseconds threshold)

# Analisis build time dengan XCLogParser
brew install xclogparser
xclogparser parse --project MyApp --reporter html

# Build time analyzer
# https://github.com/RocketSimApp/RocketSim (berbayar tapi powerful)

// ❌ TANPA explicit type: compiler harus infer — bisa lambat pada ekspresi kompleks
let config = [
    "timeout": 30,
    "retries": 3,
    "baseURL": "https://api.example.com",
    "headers": ["Content-Type": "application/json", "Accept": "application/json"]
]

// ✓ DENGAN explicit type: compiler langsung tahu, tidak perlu infer
let config: [String: Any] = [
    "timeout": 30,
    "retries": 3,
    "baseURL": "https://api.example.com",
    "headers": ["Content-Type": "application/json", "Accept": "application/json"]
]

// ❌ Monorepo: semua kode dalam satu target → rebuild seluruh app setiap perubahan kecil

// ✓ Modular: perubahan di NetworkKit hanya rebuild NetworkKit + dependent modules
// Package.swift
let package = Package(
    name: "MyAppModules",
    products: [
        .library(name: "NetworkKit", targets: ["NetworkKit"]),
        .library(name: "DesignSystem", targets: ["DesignSystem"]),
        .library(name: "Analytics", targets: ["Analytics"]),
    ],
    targets: [
        .target(name: "NetworkKit", dependencies: []),
        .target(name: "DesignSystem", dependencies: []),
        .target(name: "Analytics", dependencies: ["NetworkKit"]),
    ]
)

// SwiftUI Preview lambat karena compile seluruh module
// Buat stub data terpisah untuk preview

// ❌ Lambat: Preview menggunakan real dependencies
#Preview {
    ContentView(viewModel: ContentViewModel(
        repository: TaskRepository(database: AppDatabase.shared),
        analytics: AnalyticsService.shared
    ))
}

// ✓ Cepat: Preview menggunakan mock/stub
#Preview {
    ContentView(viewModel: ContentViewModel(
        repository: MockTaskRepository(),
        analytics: MockAnalyticsService()
    ))
}

# Pindah Derived Data ke RAM disk (hilang saat restart, tapi build ultra-cepat)
# Hanya untuk development aktif, bukan CI

# Buat RAM disk 8GB
diskutil erasevolume HFS+ "DerivedData" `hdiutil attach -nomount ram://16777216`

# Set Derived Data ke RAM disk
# Xcode → Settings → Locations → Derived Data: /Volumes/DerivedData

# Atau via command line
defaults write com.apple.dt.Xcode IDECustomDerivedDataLocation /Volumes/DerivedData

# Di .xcode/xcshareddata/xcschemes/MyApp.xcscheme
# Atau via Build Settings → Other Swift Flags

# Aktifkan Whole Module Optimization hanya untuk Archive (bukan Debug)
# Debug: -Onone (cepat compile, lambat run)
# Release: -O (lambat compile, cepat run)
# Whole Module: -whole-module-optimization (paling lambat compile, paling cepat run)

# Aktifkan incremental compilation (default di Xcode modern)
-incremental

# Parallel compilation
OTHER_SWIFT_FLAGS = $(inherited) -num-threads 8