forked from M-Labs/artiq
compiler.types: replace isinstance() with .__class__==.
This provides a 50% speedup.
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@ -64,7 +64,7 @@ class TVar(Type):
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# because paths resulting from unification of large arrays
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# can easily cause a stack overflow.
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root = self
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while isinstance(root, TVar):
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while root.__class__ == TVar:
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if root is root.parent:
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break
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else:
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@ -72,7 +72,7 @@ class TVar(Type):
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# path compression
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iter = self
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while isinstance(iter, TVar):
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while iter.__class__ == TVar:
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if iter is iter.parent:
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break
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else:
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