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⚡️ Speed up function find_last_node by 19,011% #9

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⚡️ Speed up function find_last_node by 19,011% #9

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4 changes: 3 additions & 1 deletion src/dsa/nodes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,9 @@
# derived from https://github.com/langflow-ai/langflow/pull/5261
def find_last_node(nodes, edges):
"""This function receives a flow and returns the last node."""
return next((n for n in nodes if all(e["source"] != n["id"] for e in edges)), None)
# Build set of all source node IDs for O(1) lookup
source_ids = {e["source"] for e in edges}
return next((n for n in nodes if n["id"] not in source_ids), None)


# Function to find all leaf nodes (nodes with no outgoing edges)
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