[xmlp] the recent garbage collector performance improvements

[dsimcha]

Wait a minute, since when do we even have a std.xml2?  I've never 
heard of it and it's not in the Phobos source tree (I just 
checked).

On Thursday, 2 February 2012 at 00:41:31 UTC, Richard Webb wrote:
> On 01/02/2012 19:35, dsimcha wrote:
>> I'd be very
>> interested if you could make a small, self-contained test 
>> program to use
>> as a benchmark.
>>
>
>
> The 'test' is just
>
> /////////////////
> import std.xml2;
>
> void main()
> {
>    string xmlPath = r"test.xml";
>
>    auto document = DocumentBuilder.LoadFile(xmlPath, false, 
> false);
> }
>
> /////////////////
>
> It's xmlp that does all the work (and takes all the time).
>
>
> I'll see about generating a simple test file, but basically:
>
> 50000 top level nodes
> each one has 6 child nodes
> each node has a single attribute, and the child nodes each have 
> a short text value.
>
>
> Parsing the file with DMD 2.057 takes ~25 seconds
>
> Parsing the file with DMD 2.058(Git) takes ~6.1 seconds
>
> Parsing the file with DMD 2.058, with the GC disabled during 
> the LoadFile call, takes ~2.2 seconds.
>
>
> For comparison, MSXML6 takes 1.6 seconds to load the same file.