std.xml should just go

Bruno Medeiros brunodomedeiros+spam at com.gmail
Fri Feb 11 05:19:51 PST 2011


On 04/02/2011 21:07, Steven Schveighoffer wrote:
> On Fri, 04 Feb 2011 15:44:46 -0500, Jeff Nowakowski <jeff at dilacero.org>
> wrote:
>
>> On 02/03/2011 10:07 PM, Walter Bright wrote:
>>>
>>> The way to get a high performance string parser in D is to take
>>> advantage of one of D's unique features - slices. Java, C++, C#, etc.,
>>> all rely on copying strings. With D you can just use slices into the
>>> original XML source text. If you're copying the text, you're doing it
>>> wrong.
>>
>> Java's substring() does not copy the text, at least in the official
>> JDK implementation. Unfortunately, it doesn't specify this behavior as
>> part of the String API.
>
> Yes, but Java's strings are immutable. Typically a buffered I/O stream
> has a mutable buffer used to read data. This necessitates a copy. At the
> very least, you need to continue allocating more memory to hold all the
> strings.
>
> -Steve

True, but in this case you will have the exact same problem with any 
other language as well. So it doesn't seem like D will have any 
particular advantage over Java, with regards to slicing and strings.

-- 
Bruno Medeiros - Software Engineer


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