composer用国内镜像还是慢的原因？

Question

composer config -g repo.packagist composer https://packagist.phpcomposer.com
composer install --no-progress --profile --prefer-dist -vvv

[112.8MiB/410.35s] Memory usage: 112.82MiB (peak: 294.7MiB), time: 410.35s （共72个包。如果能显示安装了多少包就好了）

还是慢。伤心。

[104.0MiB/156.06s] Downloading https://repo.packagist.org/p/sebastian/environment.json
[104.2MiB/157.16s] Writing C:/Users/Administrator/AppData/Local/Composer/repo/https---packagist.phpcomposer.com/provider-sebastian$environment.json into cache
[104.0MiB/157.17s] Reading C:/Users/Administrator/AppData/Local/Composer/repo/https---packagist.phpcomposer.com/provider-sebastian$exporter.json from cache
[104.1MiB/157.71s] Downloading https://repo.packagist.org/p/sebastian/exporter.json
[104.1MiB/158.83s] Reading C:/Users/Administrator/AppData/Local/Composer/repo/https---packagist.phpcomposer.com/provider-sebastian$global-state.json from cache
[104.1MiB/159.38s] Downloading https://repo.packagist.org/p/sebastian/global-state.json
[104.1MiB/161.24s] Reading C:/Users/Administrator/AppData/Local/Composer/repo/https---packagist.phpcomposer.com/provider-sebastian$object-enumerator.json from cache

为什么设置了国内镜像，还去repo.packagist.org下载？

https://pkg.phpcomposer.com/

镜像原理：
一般情况下，安装包的数据（主要是 zip 文件）一般是从github.com上下载的，安装包的元数据是从packagist.org上下载的。

然而，由于众所周知的原因，国外的网站连接速度很慢，并且随时可能被“墙”甚至“不存在”。

“Packagist 中国全量镜像”所做的就是缓存所有安装包和元数据到国内的机房并通过国内的 CDN 进行加速，这样就不必再去向国外的网站发起请求，从而达到加速composer install以及composer update的过程，并且更加快速、稳定。因此，即使packagist.org、github.com发生故障（主要是连接速度太慢和被墙），你仍然可以下载、更新安装包。

请问这个意思是不是可以不用访问packagist和github了？

Answer 1

应该是镜像站不供应了吧。
https://pkg.phpcomposer.com/ 不行了。
https://developer.aliyun.com/... 只镜像packagist。
https://php.cnpkg.org/ 去dl.laravel-china.org下载zip不成，跳转到codeload.github.com。

github因为国内原因经常卡吧。。

就这样。

Answer 2

composer config -g repo.packagist composer https://mirrors.aliyun.com/co...
我换成阿里云镜像 速度飙升
之前用 laravel中国和packagist中国的镜像贼慢