如何提高使用ZIPFoundation解压缩文件的速度？

Question

我正在下载一个.zip文件，其中包含一个使用Alamofire纹理的3D模型。文件大小目前为20 is。使用ZIPFoundation后，解压缩文件所需的时间是50~50。文档表明，解压缩接近20 1s的文件应该使用<1s。然而，我没有取得这些成果。下面是完成文件下载请求和解压缩的代码：

func downloadRequest(url: String, method: HTTPMethod, parameters: [String:String]?, headers: [String:String]?, destFileName: String, completion: @escaping (URL?) -> Void) {
    
    //Initial parameters
    let fullDestName = destFileName + ".zip"
    let fm = FileManager.default
    guard let documentsDirectory = fm.urls(for: .documentDirectory, in: .userDomainMask).first else {
        return
    }
    
    //Initialise temporary download location
    let destination: DownloadRequest.DownloadFileDestination = { _,_ in
        let temporaryDownloadDest = documentsDirectory.appendingPathComponent(fullDestName)
        return (temporaryDownloadDest, [.createIntermediateDirectories,.removePreviousFile])
    }
    
    //Call API to begin download request
    Alamofire.download(url, method: method, parameters: parameters, headers: headers, to: destination).response { (response) in
        let responseError = response.error
        if responseError == nil {
            print("File successfully downloaded")
            if let downloadFilePath = response.destinationURL?.path { //.....Documents/name.zip
                let sourceURL = URL(fileURLWithPath: downloadFilePath)
                let destinationURL = documentsDirectory.appendingPathComponent(destFileName) //....Documents/name
                DispatchQueue.global().async { //Failing to do this will lock up main thread
                    do {
                        try fm.createDirectory(at: destinationURL, withIntermediateDirectories: true, attributes: nil)
                        try fm.unzipItem(at: sourceURL, to: destinationURL) // <------ UNZIPPING THE FILE HERE
                        completion(destinationURL)
                    } catch {
                        print("Extraction of ZIP archive failed with error: \(error)")
                        completion(nil)
                    }
                }
            } else {
                print("file path was not found")
                completion(nil)
            }
        } else {
            print("There was an error: \(responseError!)")
            completion(nil)
        }
    }
}

我下载和解压缩文件的方法有什么问题吗?还是对库的限制？如果是这样的话，有人能推荐另一个加速这个过程的库吗？提前感谢

Answer 1

解压缩存档的代码看起来不错。

在Swift中，优化的构建和非优化的构建有很大的性能差异。当您切换到“版本”构建时，解压缩需要多长时间？