Profiling and Data.HashTable

Simon Marlow simonmar at
Mon Oct 17 05:57:27 EDT 2005

On 17 October 2005 08:07, Ketil Malde wrote:

> BTW, could one cheat by introducing a write barrier manually in some
> way?  Perhaps by (unsafe?) thaw'ing and freeze'ing the arrays when
> they are modified?

Might be worthwhile: freezing is very quick (basically a single write),
thawing is slightly slower (an out-of-line call, but a short one).  The
effect of freezing will only be felt after a couple of GCs, when
everything the array points to is pulled into the old generation and the
GC can take it off the mutable list.


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