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Avoid overhead for synthesized nodes lookup (backport #13424) #13425

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Nov 12, 2024
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Avoid overhead for synthesized nodes lookup (backport #13424) #13425

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7 changes: 4 additions & 3 deletions qiskit/transpiler/passes/synthesis/high_level_synthesis.py
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Original file line number Diff line number Diff line change
Expand Up @@ -382,7 +382,7 @@ def _run(

# If the synthesis changed the operation (i.e. it is not None), store the result.
if synthesized is not None:
synthesized_nodes[node] = (synthesized, synthesized_context)
synthesized_nodes[node._node_id] = (synthesized, synthesized_context)

# If the synthesis did not change anything, just update the qubit tracker.
elif not processed:
Expand All @@ -407,8 +407,9 @@ def _run(
outer_to_local = context.to_local_mapping()

for node in dag.topological_op_nodes():
if node in synthesized_nodes:
op, op_context = synthesized_nodes[node]

if op_tuple := synthesized_nodes.get(node._node_id, None):
op, op_context = op_tuple

if isinstance(op, Operation):
out.apply_operation_back(op, node.qargs, node.cargs)
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