python内存分析

处理图片内存溢出问题

1.第一次分析，没有主动del图片对象 ，对应分析表中左图

@profile
def my_function():    
    i = 0
    for img in line_img_list:
        i+=1
        print(i)
        img_stream = minio.download_file("line", img)
        if img_stream is None:
            print("有问题的图片：", img)
            continue
        # 格式化数据流
        cv_image = cv2.imdecode(np.frombuffer(img_stream, dtype=np.uint8), -1)
        if cv_image is None:
            continue
        img_stream = cv2.imencode('.jpg', cv_image)[1]  # 编码图片
        image_obj = BytesIO(img_stream)
  

1.第二次分析，主动del图片对象 ，对应分析结果右图

@profile
def my_function():    
    i = 0
    for img in line_img_list:
        i+=1
        print(i)
        img_stream = minio.download_file("line", img)
        if img_stream is None:
            print("有问题的图片：", img)
            continue
        # 格式化数据流
        cv_image = cv2.imdecode(np.frombuffer(img_stream, dtype=np.uint8), -1)
        if cv_image is None:
            continue
        img_stream = cv2.imencode('.jpg', cv_image)[1]  # 编码图片
        image_obj = BytesIO(img_stream)
        del image_obj
        del img_stream
        del cv_image