A row drawn before was counted with no limit on its objects, so symbols
that each hold many instances of the next made the count grow with the
product of the instances, and the Layers panel could stall on such a file.
- Counting stops after 20,000 steps: each object, subpath, text run and
symbol looked at is one step, and every 64 bytes of a symbol or placed
file name looked up is one more. A row that needs more gets its
thumbnail on the thumbnail thread, and the painted thumbnail draws
nothing for it.
- A row drawn before counts at most 20,000 objects.
dotCooCoo
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