[Issue 16349] better curl retry for install.sh script

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16349

greensunny12 at gmail.com changed:

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                 CC|                            |greensunny12 at gmail.com

--- Comment #5 from greensunny12 at gmail.com ---
> Our binaries are already hosted on S3 (that's where Github Releases come from as well).

Oh, but for Github Releases traffic is _free_, whereas if I am not mistaken you
have to pay quite a lot to AWS. A simple estimate goes like this:

25 (size of release in MB, depends of course) * 10_000 (number of monthly
downloads, I hope it's higher, see below)  / 1_000 (convert to GB) * 0.09
(transfer costs to internet, per GB)

and thus yields:

10K monthly downloads: 25 * 10000 / 1000 * 0.09 = 22.5$
30K: 67.5$
50K: 112.5$
100K monthly downloads: 225$

According to http://erdani.com/d/downloads.daily.png, there are currently at
about 1400 downloads per day (=42K /month), which means it's about 1.1K$ a
year.
I estimate the bill to be 30-40% less, because the Linux archives are better
compressed and it's mostly those that are constantly downloaded for CI. It's
still quite a lot of money (if I am not mistaken with my estimate).

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