gRPC
gRPCはHTTP/2通信でRPC(remote procedure callができるフレームワークです。.protoファイルというインタフェースを定義をサーバとクライアントで共有して、フレームワークがパラメータのチェックなどしてくれます。
他の言語だとOpenAPI/Swaggerのようにコード生成が必要ですが、node.jsではコード生成が不要で、さらにNode-REDを使えばほとんど設定だけで簡単に実装できます。開発中のソフトのエミュレータやテストスタブ/ドライバとして便利に使うことができます。
gRPCはバイナリを送ることやストリーム通信も可能であるなどのメリットがあるのですが、普通の通信でもHTTP/2によって早くなっているはずです。使い慣れたNode-REDがどのくらい早くなるか気になったので、速度を測定してみました。
評価方法
今回はhttpのPOSTとの比較を1000回呼び出しを10セット行って処理時間を比較しました。
なお、今回はWSL(V1)のNode-RED内のローカル通信で行いました。「こんなものかな」という雰囲気をお楽しみください。環境だけでなく、パラメータのデータ形式や通信方式など、評価としては不十分な点も多々ありますので、気になる方はフローを修正してご自身で試していただけたらと思います。
結果：
3倍弱の速度が出ているようです。
| HTTP | gRPC | |
|---|---|---|
| 1回目 | 6523 | 2640 |
| 2回目 | 5987 | 2133 |
| 3回目 | 5716 | 2168 |
| 4回目 | 5870 | 1852 |
| 5回目 | 5987 | 1784 |
| 6回目 | 5614 | 1763 |
| 7回目 | 5396 | 1745 |
| 8回目 | 5441 | 1889 |
| 9回目 | 5500 | 1775 |
| 10回目 | 5858 | 1827 |
| 平均(秒) | 5.7892 | 1.9576 |
フロー
コード
読み込んで使ってください
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参考文献
参考にさせていただきました。ありがとうございます。
おまけ
設定の方法がわからない方は以下をご覧ください。
Node-REDでgRPC：はじめ方