Will the D GC be awesome?

[Jacob Carlborg]

On 2012-10-09 00:44, Ben Davis wrote:

> In fairness to Java, it does share the inner char array between strings
> when you request a substring. (Inside the String class you'll find a
> reference to a char array, and 'start' and 'count' ints.) The String
> object itself though (which is small and wraps the char array reference)
> is allocated new each time. Java's GC is rather good though, so it
> totally gets away with it.

The Java GC is far superior than the one in D. But in D it's possible to 
write a parser that doesn't allocate during processing, it just need 
some pre-allocation before starting. This is all due to the array 
slicing, which I think is pretty cool. The XML parser in Tango is an 
example of this:

http://dotnot.org/blog/archives/2008/02/24/xml-benchmarks-tango-ups-the-ante/

http://dotnot.org/blog/archives/2008/03/12/why-is-dtango-so-fast-at-parsing-xml/

https://github.com/SiegeLord/Tango-D2

http://www.dsource.org/projects/tango/docs/current/tango.text.xml.PullParser.html

-- 
/Jacob Carlborg