[Issue 5623] Slow GC with large heaps

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5623



--- Comment #14 from David Simcha <dsimcha at yahoo.com> 2011-02-23 20:26:47 PST ---
(In reply to comment #11)
> In addition, your statement that we only get 16 TB of space doesn't matter.  It
> means the *jump size* is 16 TB.  That is, if you exceed 16 TB of space for a
> block, then you just store the maximum.  The algorithm just has to be adjusted
> to jump back that amount, then check the page at that location (which will also
> know how far to jump back), and continue on.
> 

I'd rather just assume that, in the near future, noone is ever going to
allocate 16 TB in one allocation and in the distant future, we can switch to
size_t, though hopefully we'll have a better GC by the time anyone has enough
RAM to allocate 16 TB in one allocation.

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