Fully parallel downloads on install #12489
Description
Provide a detailed description of the proposed feature
Fully parallel downloads, which can be limited or disabled using arguments upon package installation.
Now, while installing packages, it downloads dependencies one-by-one then installs. The new method is to download them all at once, or n of them at once.
What is the motivation for the feature?
Packages with a lot of dependencies take forever to download because of how all the downloads are linear right now.
How will the feature be relevant to at least 90% of Homebrew users?
When installing a package with a lot of small dependencies, many people often get delayed because of the server's response time. With a reasonable internet connection, parallel downloads are much faster.
What alternatives to the feature have been considered?
Less ping to servers, but it isn't viable in many times due to physical locations or server's capacity to handle requests.