docker-compose版本2与版本1相比减速

Question

我有一个docker-compose文件，其中包含以下一般内容：

mongo:
    image: mongoimage    
    expose:
        - "27017"
    ports:
        - "27017:27017"

mysql:
    image: mysqlimage
    expose:
        - "3306"
    ports:
        - "3306:3306"

data:
    image: dataimage

memcached:
    image: memcached

webserver:
    image: webserverimage
    ports:
        - "80:80"
        - "5000:5000"
        - "12500:12500"
    expose:
        - "5000"
        - "12500"
    links:
        - mongo
        - mysql
        - memcached
    hostname: localtesting.dev
    volumes_from:
        - data
    volumes:
        - localvolume1:/mountedvolume1
        - localvolume2:/mountedvolume2
        - localvolume3:/mountedvolume3
        - localvolume4:/mountedvolume4
        - localvolume5:/mountedvolume5

testing:
    image: testingimage
    ports:
        - "8080:80"
    links:
        - mongo
        - mysql
        - webserver:localtesting.dev
    volumes_from:
        - webserver

当我通过我们的本地测试套件运行时，该测试套件包含大量来自测试到网络服务器的http请求，大约需要1小时。

我将其修改为docker version 2：

version: '2'
services:
    mongo:
        image: mongoimage    
        expose:
            - "27017"
        ports:
            - "27017:27017"

    mysql:
        image: mysqlimage
        expose:
            - "3306"
        ports:
            - "3306:3306"

    data:
        image: dataimage

    memcached:
        image: memcached

    webserver:
        image: webserverimage
        ports:
            - "80:80"
            - "5000:5000"
            - "12500:12500"
        expose:
            - "5000"
            - "12500"
        links:
            - mongo
            - mysql
            - memcached
        hostname: localtesting.dev
        volumes_from:
            - data
        volumes:
            - localvolume1:/mountedvolume1
            - localvolume2:/mountedvolume2
            - localvolume3:/mountedvolume3
            - localvolume4:/mountedvolume4
            - localvolume5:/mountedvolume5

    testing:
        image: testingimage
        ports:
            - "8080:80"
        links:
            - mongo
            - mysql
            - webserver:localtesting.dev
        volumes_from:
            - webserver

当我现在通过本地测试套件运行时，它突然需要大约6个小时，所有http请求都需要更长的时间。我应该做些什么网络更改来消除额外的延迟，以及它背后的实际原因是什么？