⚡️ Speed up method ChromaDB._parse_output by 23%

[codeflash-ai]

📄 23% (0.23x) speedup for ChromaDB._parse_output in mem0/vector_stores/chroma.py

⏱️ Runtime : 37.9 microseconds → 30.7 microseconds (best of 72 runs)

📝 Explanation and details

The optimization achieves a 23% speedup by eliminating redundant operations and pre-computing values in the _parse_output method:

Key optimizations:

1. Eliminated temporary list creation: Replaced the keys list and values list with direct variable assignments, removing the overhead of list iteration and append operations.

2. Pre-computed lengths once: Instead of repeatedly calling len() within the loop conditions, lengths are calculated once and stored in ids_len, distances_len, and metadatas_len. This eliminates redundant length calculations during each iteration.

3. Simplified loop conditions: Replaced complex boolean expressions like isinstance(ids, list) and ids and i < len(ids) with simple index bounds checks like i < ids_len, reducing the number of runtime type checks and boolean evaluations.

4. Method reference hoisting: Stored result.append in a local variable append to avoid attribute lookup overhead in the tight loop.

5. Streamlined import order: Moved typing imports before chromadb imports for better organization (minor impact).

The line profiler shows the original version spent 15.7% of time in the expensive max(len(v) for v in values...) generator expression, while the optimized version calculates max from pre-computed lengths in just 4.3% of total time. The loop body execution also became more efficient due to simpler conditional checks, reducing from 27.2% to 35.3% of time but with faster per-iteration execution.

These optimizations are particularly effective for scenarios with moderate to large result sets where the parsing overhead becomes significant relative to the total processing time.

✅ Correctness verification report:

Test	Status
⚙️ Existing Unit Tests	🔘 None Found
🌀 Generated Regression Tests	🔘 None Found
⏪ Replay Tests	✅ 8 Passed
🔎 Concolic Coverage Tests	🔘 None Found
📊 Tests Coverage	100.0%

⏪ Replay Tests and Runtime

Test File::Test Function	Original ⏱️	Optimized ⏱️	Speedup
test_pytest_testsconfigstest_prompts_py_testsvector_storestest_weaviate_py_testsllmstest_deepseek_py_test__replay_test_0.py::test_mem0_vector_stores_chroma_ChromaDB__parse_output	37.9μs	30.7μs	23.5%✅

To edit these changes git checkout codeflash/optimize-ChromaDB._parse_output-mhl6jzbq and push.