I may be old - But what is abnormal at 10mins compilation time? Looks perfectly 
fine to me - I still remember hours of compilation…

Jan

> On 22 Mar 2017, at 21:03, piotr gorzelany via swift-users 
> <swift-users@swift.org> wrote:
> 
> Hi, I hope I reached the right mailing list to ask a question about tooling.
> 
> Can somebody from the compiler or Xcode team share some tips on how to 
> improve compilation times of larger Swift projects?
> 
> I am an iOS developer and the largest issue my team has with Swift so far is 
> that when the project gets semi large (~30 000 lines) the compilation times 
> start to be high (~10 minutes from clean). This is a MAJOR downside since iOS 
> development oftentimes requires rapid changes to UI or logic. Every person of 
> my team compiles a project at least 10 times a day to test new features or 
> functionalities. When compilation times start to be higher than 10 minutes 
> that gets us to ~1.5h a day of developer time spend just on compiling. Not to 
> mention the focus lost when this is happening.
> 
> I know the Swift Evolution list is buzzing with new ideas and features but 
> from my experience the compilation times is a CRITICAL thing to improve in 
> the next Swift release since it cost real money to waste all those developer 
> hours. Just think of all the hours lost on compiling across all Swift devs 
> worldwide and you will get to probably dozens of thousand of dev hours a day.
> 
> Is the core compiler team going to address compilation performance in the 
> next release?
> 
> Maybe there is an existing solution to long compilation times that we don't 
> know of? It would be great if anybody could share.
> I was thinking maybe of dividing the app into multiple frameworks since I 
> think frameworks are compiled only once only on change?
> 
> Regards,
> Piotr
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