有没有一种方法可以减少使用Avplayer时播放音频文件的延迟？

Question

我的Firebase存储中有一些音频文件。我可以获取这些音频文件的下载URL。我正在使用这些URL播放音频文件。（我没有下载音频文件）

问题是我很快就获得了音频文件的URL，但是AVPlayer仍然需要4到10秒钟才能开始播放。

我添加了以下代码行以减少延迟：

weakSelf.player!.automaticallyWaitsToMinimizeStalling = false

但是播放音频文件仍然需要几秒钟

这是我的功能：

var audioPlayer: AVAudioPlayer?

func playAudioFile(audioUrl: String) {

        let audioPath = audioReference.child(audioUrl)

        audioPath.downloadURL { [weak self] (url, err) in

            guard let weakSelf = self else {return}

            if err != nil {
                print("Error => \(err)")
            }

            if let url = url {
                do {
                    let playerItem = AVPlayerItem(url: url)
                    weakSelf.player = try AVPlayer(playerItem:playerItem)
                    weakSelf.player!.volume = 1.0
                    weakSelf.player!.automaticallyWaitsToMinimizeStalling = false
                    weakSelf.player!.play()
                    NotificationCenter.default.addObserver(weakSelf, selector: #selector(weakSelf.didFinishPlaying), name: NSNotification.Name.AVPlayerItemDidPlayToEndTime, object: playerItem)

                    self?.playerObserver = playerItem.observe(\.status, options: [.new, .old], changeHandler: { (playerItem, change) in
                        if playerItem.status == .readyToPlay {
                            SVProgressHUD.dismiss()
                        }
                    })

                } catch let error as NSError {
                    weakSelf.player = nil
                    print(error.localizedDescription)
                } catch {
                    print("AVAudioPlayer init failed")
                }
            }
        }
    }

我希望AVPlayer从URL获得音频文件后立即播放音频文件。

如何减少延迟？