Re: speeding up XS_DBI_dispatch()

On 9 February 2012 22:53, Martin J. Evans <[email protected]> wrote:
> Something between 1.616_901 and 1.616_902 changed which breaks fork() in DBI
> on Windows. The test 16destroy.t fails with a Windows error
>
> "This application has requested the Runtime to terminate in an unusual way"
>
> Initially I saw this in 1.617 but then I stepped backwards to find the
> problem occurred between these 2 versions. Some smokers have reported this
> problem in 5.10.1, 5.14.0 and 5.14.2. I can reproduce on my wife's netbook
> which is strawberry perl 5.12.0.
>
> As you'll see from the Changes file the only 2 entries added were:
>
>   Enhanced performance for threaded perls (Dave Mitchell, Tim Bunce)

Well perls fork() relies on threaded  perl so it could very easily be
Dave's patch. Dave do you have access to a win32 build environment?

>   Added note to DBI::Profile about async queries (Marcel Gr<FC>nauer).
>
> I've diffed the two versions but there were quite a lot of changes and so
> far I cannot locate the problem. I've given up for tonight but might find
> time to do more.
>
> I have a vastly reduced 16destroy.t which still demonstrates the problem if
> it helps anyone.

Is it possible to do something like git-bisect here?

Yves


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