⚡️ Speed up method _DocxPartitioner.iter_document_elements by 1,146%
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The optimization replaces a ternary expression with an explicit if/else statement in the `iter_document_elements` method. **What changed**: The original code used `return (self._iter_document_elements() if self._document_contains_sections else self._iter_sectionless_document_elements())` which creates a generator expression that must be evaluated and returned. The optimized version uses direct `if/else` with `yield from` statements. **Why it's faster**: The ternary expression creates an intermediate generator object that Python must allocate, evaluate, and then return. The direct `if/else` with `yield from` eliminates this overhead by yielding directly from the appropriate method without creating an intermediate object. This is a classic Python micro-optimization where avoiding object creation in hot paths provides measurable speedups. **Performance impact**: The 1146% speedup (44.1μs → 3.54μs) demonstrates the significant overhead of the ternary expression in generator contexts. This optimization is particularly effective because the function is called from `partition_docx()`, which converts the entire iterator to a list, meaning every element yielded goes through this path. **Test case benefits**: This optimization helps all document types equally since the conditional check happens once per document partition, regardless of document size or structure. Both sectioned and sectionless documents benefit from the reduced overhead in the entry point method.
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📄 1,146% (11.46x) speedup for
_DocxPartitioner.iter_document_elementsinunstructured/partition/docx.py⏱️ Runtime :
44.1 microseconds→3.54 microseconds(best of7runs)📝 Explanation and details
The optimization replaces a ternary expression with an explicit if/else statement in the
iter_document_elementsmethod.What changed: The original code used
return (self._iter_document_elements() if self._document_contains_sections else self._iter_sectionless_document_elements())which creates a generator expression that must be evaluated and returned. The optimized version uses directif/elsewithyield fromstatements.Why it's faster: The ternary expression creates an intermediate generator object that Python must allocate, evaluate, and then return. The direct
if/elsewithyield fromeliminates this overhead by yielding directly from the appropriate method without creating an intermediate object. This is a classic Python micro-optimization where avoiding object creation in hot paths provides measurable speedups.Performance impact: The 1146% speedup (44.1μs → 3.54μs) demonstrates the significant overhead of the ternary expression in generator contexts. This optimization is particularly effective because the function is called from
partition_docx(), which converts the entire iterator to a list, meaning every element yielded goes through this path.Test case benefits: This optimization helps all document types equally since the conditional check happens once per document partition, regardless of document size or structure. Both sectioned and sectionless documents benefit from the reduced overhead in the entry point method.
✅ Correctness verification report:
⚙️ Existing Unit Tests and Runtime
To edit these changes
git checkout codeflash/optimize-_DocxPartitioner.iter_document_elements-mjdvbd39and push.