[xmlp] the recent garbage collector performance improvements

[dsimcha]

On Thursday, 2 February 2012 at 04:38:49 UTC, Robert Jacques 
wrote:
> An XML parser would probably want some kind of stack segment 
> growth schedule, which, IIRC isn't supported by RegionAllocator.

I had considered putting that in RegionAllocator but I was 
skeptical of the benefit, at least assuming we're targeting PCs 
and not embedded devices.   The default segment size is 4MB.  
Trying to make the initial size any smaller won't save much 
memory.  Four megabytes is also big enough that new segments 
would be allocated so infrequently that the cost would be 
negligible.  I concluded that the added complexity wasn't 
justified.