如何提高使用 ZIPFoundation 解压缩文件的速度？

Question

我正在使用 Alamofire 下载一个 .zip 文件，其中包含带纹理的 3D 模型。当前文件大小为 20mb。使用 ZIPFoundation 后，解压缩文件所需的时间约为 50 秒。文档表明解压缩接近 20mb 的文件应该花费 <1s。但是，我没有实现这些结果。这是我完成下载请求和文件解压缩的代码：

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)
        }
    }
}

是我下载解压的方法有问题，还是库的限制？如果是这样，谁能推荐另一个可以加速这个过程的图书馆？提前致谢

Answer 1

解压缩存档的代码看起来不错。
Swift 中的优化构建和 non-optimized 构建之间存在巨大的性能差异。当您切换到“发布”版本时，解压缩需要多长时间？

如何提高使用 ZIPFoundation 解压缩文件的速度？

How can I increase the speed of unzipping files using ZIPFoundation?

ios

swift

zipfoundation