⚡ Bolt: [O(N^2) list deduplication performance] - #1140
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🟡 Malformed strings crash chart exports
An unhashable string subclass in a role name, cue, or active role ID makes dictionary deduplication raise TypeError. Both export builders then violate their safe-failure contract.
Prompt for agents
Restore safe failure for all three new dictionary-based deduplication paths in services/analysis-engine/src/bandscope_analysis/exports/chart.py: _active_role_ids, _active_role_names, and _section_cue. Values can pass isinstance(value, str) while remaining unhashable, such as a str subclass with __hash__ = None; the previous list membership logic accepted these values. Preserve insertion order and linear behavior for normal strings, while skipping malformed unhashable values rather than allowing TypeError to escape. Add tests covering malformed unhashable role IDs, display names, and cue values through both public export builders.
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Closing as a proven duplicate of canonical chart-export writer #1076 after exact-head semantic comparison. Current #1140 head #1076 current head No #1140 checks, reviews, approvals, or predecessor evidence transfer to #1076. |
Understood. Acknowledging that this work is now obsolete as it's a proven duplicate of canonical chart-export writer #1076, and stopping work on this task. |
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💡 What: Optimized list deduplication loops by replacing O(N) list lookups with O(1) dictionary key lookups.
🎯 Why: Using
if item not in lst: lst.append(item)inside loops results in O(N^2) complexity, degrading performance for large section counts.📊 Impact: Reduces deduplication complexity from O(N^2) to O(N) while preserving insertion order (guaranteed by Python 3.7+ dictionaries).
🔬 Measurement: Python unit tests via
uv run pytestensure outputs remain identical.PR created automatically by Jules for task 9512803248755467289 started by @seonghobae