ios OSS上传图片很慢

刚开始用阿里的OSS上传图片，结果2M大的图片 差不多用了1分钟才传成功。 如何能快一点？ 下面是我的上传代码

• (void)uploadObjectAsyncContentType:(NSString)contentType andName:(NSString)fileName data:(NSData*)myData{

  OSSPutObjectRequest * put = [OSSPutObjectRequest new];
  
  put.bucketName =myBucketName;
  
   NSString *objectKeyFile = [NSString stringWithFormat:@"5678bde87fef6a300b000029/%@/%@",[self currentTime:@"YYYYMMdd"],fileName];
  put.objectKey = objectKeyFile;
  
  put.uploadingData = myData; // 直接上传NSData
  
  put.uploadProgress = ^(int64_t bytesSent,int64_t totalByteSent, int64_t totalBytesExpectedToSend) {
  

  // NSLog(@"%lld, %lld, %lld", bytesSent, totalByteSent, totalBytesExpectedToSend);
  NSInteger fir = totalByteSent;
  NSInteger all = totalBytesExpectedToSend;
  CGFloat rate = 1.0*fir/all;
  NSLog(@"比例 = %lf.2",rate);

  };
  OSSTask * putTask = [client putObject:put];
  // 上传阿里云   
  [putTask continueWithBlock:^id(OSSTask *task) {
  

  if (!task.error) {

  
  NSLog(@"upload object success!");
  NSLog(@"task.result == %@",task.result);
  

  } else {

  NSLog(@"upload object failed, error: %@" , task.error);
  

  }
  return nil;

  }]; 

  }