[webkit-dev] Growing tired of long build times? Check out this awesome new way to speed up your build... soon (HINT: It's not buying a new computer)

[Sam Weinig]

> On Aug 29, 2017, at 6:36 PM, Maciej Stachowiak <mjs at apple.com> wrote:
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> 
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>> On Aug 29, 2017, at 5:54 PM, Sam Weinig <weinig at apple.com <mailto:weinig at apple.com>> wrote:
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>> 
>> 
>>> On Aug 29, 2017, at 12:46 PM, Geoffrey Garen <ggaren at apple.com <mailto:ggaren at apple.com>> wrote:
>>> 
>>>> This isn’t the scenario I find myself in most often.  A much more common scenario is working on a change; touch one or two files, and then compile and test/debug.  Rinse and repeat.
>>> 
>>> We’ve already tested this case. The worst case slowdown, if you touch a small file that's in the same bundle as the biggest .cpp file in the project, is 6s => 7s (20%).
>>> 
>>> Geoff
>> 
>> I see larger than ~6 second build times with this scenario, not measure scientifically, but I would approximate it more around 20 - 30 seconds. Do you expect the 20% to scale linearly?
> 
> Is that just compile time or total build time including build system overhead? I found that for single-file builds the compile step is less than half the total time.


I’m not entirely sure. I usually don’t pay attention to what is happening during the compile.  From doing one right now, it seems to be about 50-50 for one small file.

- Sam

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>> In a completely other direction, what does this mean for use of Xcode? Can we still build from Xcode? Debug?
>> 
>> - Sam
>> 
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