Re: Parallel downloads

[John Soo]

Hi everyone,

I’ve been watching this from afar and one thing and while I have to agree with 
this:

> .. I suspect there’s little to
> be gained by having several connections in parallel.

I do have to say that more fine grained concurrency would really help speed up 
builds without substitutes.

 Especially on old hardware, some builds can actually exhaust all resources. 
That means you can’t really get a speed up by bumping the max jobs. 

What would help is doing downloads of sources and substitutes asynchronously 
while a non-substitute job is taking place. If some network activity could be 
backgrounded, I think you might find build times decrease a lot. 

Thanks!

John