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Walkthrough2つのブートストラップモジュールにおいて、静的なトップレベルインポートを動的なランタイムインポートに置き換えました。NestJSサービスとマスター/ワーカープロセスモジュールの遅延読み込みにより、初期ロード時間を削減します。 Changes
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Greptile OverviewGreptile SummaryこのPRは、クラスタリング環境でのコールドスタート時間を削減するため、静的インポートを動的インポートに変更する最適化を実装しています。 主な変更点:
効果: 実装の妥当性:
Confidence Score: 5/5
Important Files Changed
Sequence DiagramsequenceDiagram
participant Entry as entry.ts
participant Master as master.ts
participant Worker as worker.ts
participant Common as common.ts
participant Modules as Heavy Modules<br/>(MainModule, ServerService,<br/>QueueProcessorModule, etc)
Note over Entry: プロセス開始
alt isPrimary or disableClustering
Entry->>Entry: 動的インポート: masterMain
Entry->>Master: masterMain()
Master->>Master: greet(), showEnvironment()
alt onlyQueue
Master->>Common: jobQueue()
Common->>Common: 動的インポート: QueueProcessorModule等
Common->>Modules: QueueProcessorModule読み込み
else onlyServer or default
Master->>Common: server()
Common->>Common: 動的インポート: MainModule等
Common->>Modules: MainModule, ServerService読み込み
end
opt クラスタリング有効
Master->>Master: spawnWorkers()
Master->>Entry: cluster.fork()
end
end
alt isWorker
Entry->>Entry: 動的インポート: workerMain
Entry->>Worker: workerMain()
alt onlyServer
Worker->>Common: server()
Common->>Common: 動的インポート: MainModule等
Common->>Modules: MainModule, ServerService読み込み
else onlyQueue or default
Worker->>Common: jobQueue()
Common->>Common: 動的インポート: QueueProcessorModule等
Common->>Modules: QueueProcessorModule読み込み
end
Worker->>Entry: process.send('ready')
end
Note over Entry,Modules: 最適化効果: 各プロセスは必要なモジュールのみロード
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Pull request overview
This PR implements a performance optimization to reduce cold-start time in clustered environments by converting static imports to dynamic imports. The changes ensure that master process code is not loaded in worker processes and vice versa, which reduces unnecessary module loading when processes are forked.
Changes:
- Converted static imports of
masterMainandworkerMainto dynamic imports in entry.ts, loaded only when needed based on process type - Converted static imports in common.ts functions to dynamic imports, allowing server and queue processor modules to be loaded only when their respective functions are called
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| packages/backend/src/boot/entry.ts | Replaced static imports of master.js and worker.js with dynamic imports within their respective conditional blocks |
| packages/backend/src/boot/common.ts | Replaced static imports with dynamic imports inside server() and jobQueue() functions to defer module loading |
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What
Implemented dynamic imports in boot process to reduce cold-start time in clustered environments. This change ensures that worker-side code is not loaded in the master process and vice versa.
Why
This optimization reduces the initial load time by preventing unnecessary module imports. Previously, both master and worker code was being imported regardless of which process was running, causing redundant loading of the full module graph.
Checklist
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