On 2015-11-10 14:07, Stanislav Nikolov wrote:
On 11/10/2015 08:55 PM, Alan McKinnon wrote:
On 10/11/2015 20:37, Stanislav Nikolov wrote:
On 11/10/2015 08:17 PM, Mick wrote:
On Tuesday 10 Nov 2015 17:47:08 Stanislav Nikolov wrote:
Dear Gentoo users,
I'm building a new PC. I have a budget of ~$550-$650.
<snip>
The most expensive Intel CPU is the skylake i7-6700k.
Thanks
I can't help but think you are approaching this from the wrong perspective.
Why exactly are you using compile times as your sole criterion? Are you
building a compile farm for Ubuntu? Running continuous integration tests
for LibreOffice [on a $600 budget in a cardboard box :-) ]?
Or do you want emerge world to get it over with quicker?
If the latter, you better rethink your priorities. In computing terms,
compilation is a rare event; launching apps is a common event; and
writing to the disk happens all the time. Optimize for the common case.
In addition, upgrades are something that can be done overnight, or
really any time you are not using the machine.
A CPU never works in isolation, it is always part of a much larger
system, like disks, RAM and all possible kinds of I/O. The best CPU on
the market plugged into a POS motherboard will perform on emerge world
like a piece of shit - it will follow the weakest link.
This; I have an i7-3930K, which has 6 physical cores at 3.8GHz. I also
have 32GB of RAM and an SSD. There was a large speedup[1] moving
portage's workdir from SSD to tmpfs. Compiling is a really balanced
workload, stressing the disk (multiple small reads), memory, and CPU.
For fast compilation, emphasize RAM first (compile in tmpfs if
possible), then CPU, then disk. Like Alan said, though, you should
really optimize for the average case on not worry about the speed of
compiling stuff.
Alec
1. It was a long time ago so I don't remember the exact numbers, but my
firefox compiling time went from ~15 minutes to ~10 minutes after
switching from SSD to tmpfs for portage's workdir.
