Hi all !
I wonder why there's no option to tell dub split files into groups of equal size and then run N instances of dmd ?
I think it can greatly reduce compile time.

On Thursday, 11 June 2015 at 14:01:12 UTC, Temtaime wrote:
> Hi all !
> I wonder why there's no option to tell dub split files into groups of equal size and then run N instances of dmd ?
> I think it can greatly reduce compile time.

dub options are a bit hidden.

dub build --help

     --build-mode=VALUE
                        Specifies the way the compiler and linker are invoked.
                        Valid values:
                        separate (default), allAtOnce, singleFile


      --parallel        Runs multiple compiler instances in parallel, if
                        possible.

On Thursday, 11 June 2015 at 14:07:10 UTC, weaselcat wrote:
> On Thursday, 11 June 2015 at 14:01:12 UTC, Temtaime wrote:
>> Hi all !
>> I wonder why there's no option to tell dub split files into groups of equal size and then run N instances of dmd ?
>> I think it can greatly reduce compile time.
>
> dub options are a bit hidden.
>
> dub build --help
>
>      --build-mode=VALUE
>                         Specifies the way the compiler and linker are invoked.
>                         Valid values:
>                         separate (default), allAtOnce, singleFile
>
>
>       --parallel        Runs multiple compiler instances in parallel, if
>                         possible.

After rereading your question, that actually isn't exactly what
you were asking for. Sorry for the noise, I need my coffee.

On 2015-06-11 16:08, weaselcat wrote:
> On Thursday, 11 June 2015 at 14:07:10 UTC, weaselcat wrote:

>>       --parallel        Runs multiple compiler instances in parallel, if
>>                         possible.
>
> After rereading your question, that actually isn't exactly what
> you were asking for. Sorry for the noise, I need my coffee.

Isn't that what the --parallel flag is for?

-- 
/Jacob Carlborg

On Friday, 12 June 2015 at 07:20:35 UTC, Jacob Carlborg wrote:
> On 2015-06-11 16:08, weaselcat wrote:
>> On Thursday, 11 June 2015 at 14:07:10 UTC, weaselcat wrote:
>
>>>      --parallel        Runs multiple compiler instances in parallel, if
>>>                        possible.
>>
>> After rereading your question, that actually isn't exactly what
>> you were asking for. Sorry for the noise, I need my coffee.
>
> Isn't that what the --parallel flag is for?

As far as I can tell he wants it broken down into equal-sized n chunks of files where n is the number of CPU cores available, and --parallel just runs each file in parallel.

I actually hadn't thought of that before, there might be a (big?) benefit from this as dmd is slow to parse per-file. Perhaps decide which files are in the chunks based on dependency analysis.

bye.