使用for回圈時Firestore寫入函式花費的時間太長

我正在運行一個 for 回圈函式，以從 iOS 應用程式向 Firestore 中的現有集合創建/添加新檔案。雖然我只創建了大約 48 個檔案，這遠低于基于檔案的規定寫入限制（每秒 500 個檔案） -

這是正常的事情嗎？還是我的 swift 代碼沒有“優化”？'

根據@Joakim Danielson 的建議，我嘗試向 Firestore 添加/創建較少數量的檔案，但延遲或創建速率保持不變，每個檔案的創建時間約為 0.2 秒。

我對應用程式的用戶體驗感到非常擔心，盡管這樣的創建程序只為新用戶發生過一次，但我預計會為新用戶創建更多的檔案。請在下面查看我的代碼，讓我知道是否還有其他我可以利用的最佳實踐。

下面是 Xcode 控制臺的螢屏截圖，供在創建檔案時參考。

func createAndReadUserSpecificDayProgramDataToFirestore() {
        print("codementor: createAndReadUserSpecificDayProgramDataToFirestore started")
        let tabbar = tabBarController as! MainTabBarController
        
        guard let userID = Auth.auth().currentUser?.uid else {
            print("no current user logged in")
            return
        }
        
        print("create user specific dayprogram profile using for loop and dayprogram list in tabbar")
        
        if tabbar.dayProgramList.count == 0 {
            
            print("tabbar day program list has no day program profile")
            return
        }
        
        startActivityIndicator()

        for dayprogram in tabbar.dayProgramList {
            
            print("dayprogram forloop executed")
            
            var ref: DocumentReference? = nil
            print("codementor: document is adding")
            ref = self.db.collection("Day").addDocument(data: [
                "author_uid": dayprogram.author_uid ?? "",
                "barbellWeight": dayprogram.barbellWeight ?? "",
                "benchWeight": dayprogram.benchWeight ?? "",
                "createDate": dayprogram.createDate ?? Date(),
                "dayId": dayprogram.dayId ?? "",
                "dayIntensity": dayprogram.dayIntensity ?? "",
                "daySequence": dayprogram.daySequence ?? "",
                "deadliftWeight": dayprogram.deadliftWeight ?? "",
                "defaultRestTime": dayprogram.defaultRestTime ?? "",
                "isPublicFlag": dayprogram.isPublicFlag ?? "",
                "lastUpdatedBy": dayprogram.lastUpdatedBy ?? "",
                "numberOfExercise": dayprogram.numberOfExercise ?? "",
                "overheadWeight": dayprogram.overheadWeight ?? "",
                "prcntComplete": dayprogram.prcntComplete ?? "",
                "squatWeight": dayprogram.squatWeight ?? "",
                "status": dayprogram.status ?? "",
                "targetRestEndHR": dayprogram.targetRestEndHR ?? "",
                "workoutDate": dayprogram.workoutDate ?? "",
                "workoutId": dayprogram.workoutId ?? "",
                "userID": userID
            ], completion: { err in
                
                self.programCount  = 1
                
                if self.programCount == tabbar.dayProgramList.count {
                    print("dayprogram forloop function, which is to create user specific profile completed at \(CFAbsoluteTimeGetCurrent())")
                    self.createAndOrReadUserSpecificDayProgramData()
                    self.stopActivityIndicator()
                    print("forlopp dayprogram all calls finished")
                }

                if let err = err {
                    print("Error adding user specific dayprogram profile: \(err)")
                } else {
                    print("timestamp successfully adding: \(CFAbsoluteTimeGetCurrent())")
                    print("User specific dayprogram profile added with ID: \(ref!.documentID)")
                }
                print("forlopp dayprogram \(ref!.documentID) finished")
                
            })

           print("forlopp dayprogram `dispatchGroup.leave()` was here, but this was the wrong place")
        }
        
        print("forlopp dayprogram more exucution if there was any")
        
    }

uj5u.com熱心網友回復：

使用批處理而不是上傳單個檔案

func createAndReadUserSpecificDayProgramDataToFirestore() {
    print("codementor: createAndReadUserSpecificDayProgramDataToFirestore started")
    let tabbar = tabBarController as! MainTabBarController
    
    guard let userID = Auth.auth().currentUser?.uid else {
        print("no current user logged in")
        return
    }
    
    print("create user specific dayprogram profile using for loop and dayprogram list in tabbar")
    
    if tabbar.dayProgramList.count == 0 {
        print("tabbar day program list has no day program profile")
        return
    }
    
    startActivityIndicator()
    let batch = db.batch()
    for dayprogram in tabbar.dayProgramList {
        print("dayprogram forloop executed")
        var ref: DocumentReference = db.collection("myCollection").document()
        batch.setData([
            "author_uid": dayprogram.author_uid ?? "",
            "barbellWeight": dayprogram.barbellWeight ?? "",
            // your data
            "workoutId": dayprogram.workoutId ?? "",
            "userID": userID
        ], forDocument: ref)
        self.programCount  = 1
    }
    // this writes everything to the database all at once.
    // if ANY of them fail, an error will be thrown
    // and the entire operation fails
    batch.commit { err in
        if self.programCount == tabbar.dayProgramList.count {
            print("dayprogram forloop function, which is to create user specific profile completed at \(CFAbsoluteTimeGetCurrent())")
            self.createAndOrReadUserSpecificDayProgramData()
            self.stopActivityIndicator()
            print("forlopp dayprogram all calls finished")
        }
    }
    print("forlopp dayprogram more exucution if there was any")
}

標籤：ios 迅速 for循环 谷歌云firestore

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