why are custom properties so fast?

[Richard Gaskin]

xbury.cs at clearstream.com wrote:
> Did you try also with a hidden field?

In my earlier tests the times for a hidden field were not much different 
than for a visible one.  Tuviah that the bigger difference is whether a 
field is on an open card or not, as even hidden fields on open cards are 
initialized with the same overhead stuff as visible fields (in case 
they're to be shown).  Her tests seem to support Tuv's explanation:

 > using a field  740 ticks
 > using a field from sub stack   230 ticks

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  Richard Gaskin
  Fourth World Media Corporation
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