Fixed|libdeng2|ConstantRule: Only invalidate if value actually changes
A perf problem was caused by RuleRectangle updating the outputs insuch a manner that caused ConstantRule to be always invalidated.
Todo: Perhaps RuleRectangle could be better implemented withIndirectRules?
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Added by skyjake about 11 years ago
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Fixed|libdeng2|ConstantRule: Only invalidate if value actually changes
A perf problem was caused by RuleRectangle updating the outputs in
such a manner that caused ConstantRule to be always invalidated.
Todo: Perhaps RuleRectangle could be better implemented with
IndirectRules?