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@wakki_haya(wakki)

FutureBuilder で、中々snapshotが返ってこない

Posted at

環境

Flutter + Firebase + Providerを MVVMモデルで作っていた

問題

FutureBuilder 
   - StreamBuilder
       - FutureBuilder

のようなbuilder 処理がかなりのネストになっていたせいで、

  • Navigator.push 後の画面表示や、初回表示(kill後アプリ表示) で、15sくらい処理がローディング状態であった

解決策

AsyncMemoizerを使う

一番top level のFutureBuilder にて、AsyncMemoizer を使ったら、格段に処理が速くなった

AsyncMemoizer の使い方は、 ここらへんの記事 を参照

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