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Optimize standardize_quotes
The optimized code achieves a **144% speedup** by replacing a loop-based character replacement approach with Python's built-in `str.translate()` method using a pre-computed translation table. ## Key Optimizations **1. Pre-computed Translation Table at Module Load** - The quote dictionaries and translation table are now created once at module import time (module-level constants prefixed with `_`) - Original code recreated these 40+ entry dictionaries on every function call (6.1% + 6.5% = 12.6% of runtime just for dictionary creation) - Translation table maps Unicode codepoints directly to ASCII quote codepoints, eliminating repeated string operations **2. Single-Pass O(n) Algorithm with `str.translate()`** - Original: Two loops iterating through ~40 quote types, calling `unicode_to_char()` 3,096 times (67.5% of total runtime) and performing substring searches with `in` operator (5.9% of runtime) - Optimized: Single `str.translate()` call that processes the entire string in one pass using efficient C-level implementation - Eliminates 3,096 function calls to `unicode_to_char()` and all associated string parsing/conversion overhead **3. Algorithmic Complexity Improvement** - Original: O(n × m) where n = text length, m = number of quote types (~40), with repeated `text.replace()` creating new string objects - Optimized: O(n) single pass through the text, with translation table lookups being O(1) ## Performance Context Based on `function_references`, this function is called from `calculate_edit_distance()`, which is likely in a **hot path** for text extraction metrics. The function processes strings before edit distance calculations, meaning: - Any text comparison workflow will call this repeatedly - The 144% speedup compounds when processing multiple documents or performing batch comparisons - Reduced memory allocation pressure from eliminating repeated dictionary creation and intermediate string objects ## Test Case Insights The test with input `"«'"` (containing both double and single quote variants) shows the optimization handles mixed quote types efficiently in a single pass, whereas the original code would iterate through all 40 quote types regardless of actual presence in the text.
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‎unstructured/metrics/text_extraction.py‎

Lines changed: 58 additions & 64 deletions
Original file line numberDiff line numberDiff line change
@@ -4,6 +4,54 @@
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from unstructured.cleaners.core import clean_bullets, remove_sentence_punctuation
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_DOUBLE_QUOTES = {
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'"': "U+0022", # noqa 601 # Standard typewriter/programmer's quote
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'"': "U+201C", # noqa 601 # Left double quotation mark
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'"': "U+201D", # noqa 601 # Right double quotation mark
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"„": "U+201E", # Double low-9 quotation mark
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"‟": "U+201F", # Double high-reversed-9 quotation mark
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"«": "U+00AB", # Left-pointing double angle quotation mark
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"»": "U+00BB", # Right-pointing double angle quotation mark
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"❝": "U+275D", # Heavy double turned comma quotation mark ornament
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"❞": "U+275E", # Heavy double comma quotation mark ornament
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"⹂": "U+2E42", # Double low-reversed-9 quotation mark
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"🙶": "U+1F676", # SANS-SERIF HEAVY DOUBLE TURNED COMMA QUOTATION MARK ORNAMENT
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"🙷": "U+1F677", # SANS-SERIF HEAVY DOUBLE COMMA QUOTATION MARK ORNAMENT
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"🙸": "U+1F678", # SANS-SERIF HEAVY LOW DOUBLE COMMA QUOTATION MARK ORNAMENT
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"⠦": "U+2826", # Braille double closing quotation mark
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"⠴": "U+2834", # Braille double opening quotation mark
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"〝": "U+301D", # REVERSED DOUBLE PRIME QUOTATION MARK
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"〞": "U+301E", # DOUBLE PRIME QUOTATION MARK
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"〟": "U+301F", # LOW DOUBLE PRIME QUOTATION MARK
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"＂": "U+FF02", # FULLWIDTH QUOTATION MARK
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",,": "U+275E", # LOW HEAVY DOUBLE COMMA ORNAMENT
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}
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_SINGLE_QUOTES = {
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"'": "U+0027", # noqa 601 # Standard typewriter/programmer's quote
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"'": "U+2018", # noqa 601 # Left single quotation mark
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"'": "U+2019", # noqa 601 # Right single quotation mark # noqa: W605
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"‚": "U+201A", # Single low-9 quotation mark
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"‛": "U+201B", # Single high-reversed-9 quotation mark
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"‹": "U+2039", # Single left-pointing angle quotation mark
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"›": "U+203A", # Single right-pointing angle quotation mark
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"❛": "U+275B", # Heavy single turned comma quotation mark ornament
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"❜": "U+275C", # Heavy single comma quotation mark ornament
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"「": "U+300C", # Left corner bracket
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"」": "U+300D", # Right corner bracket
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"『": "U+300E", # Left white corner bracket
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"』": "U+300F", # Right white corner bracket
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"﹁": "U+FE41", # PRESENTATION FORM FOR VERTICAL LEFT CORNER BRACKET
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"﹂": "U+FE42", # PRESENTATION FORM FOR VERTICAL RIGHT CORNER BRACKET
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"﹃": "U+FE43", # PRESENTATION FORM FOR VERTICAL LEFT WHITE CORNER BRACKET
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"﹄": "U+FE44", # PRESENTATION FORM FOR VERTICAL RIGHT WHITE CORNER BRACKET
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"＇": "U+FF07", # FULLWIDTH APOSTROPHE
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"｢": "U+FF62", # HALFWIDTH LEFT CORNER BRACKET
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"｣": "U+FF63", # HALFWIDTH RIGHT CORNER BRACKET
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}
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_TRANSLATION_TABLE = {}
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def calculate_accuracy(
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output: Optional[str],
@@ -172,70 +220,7 @@ def standardize_quotes(text: str) -> str:
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Returns:
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str: The text with standardized quotes.
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"""
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# Double Quotes Dictionary
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double_quotes = {
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'"': "U+0022", # noqa 601 # Standard typewriter/programmer's quote
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'"': "U+201C", # noqa 601 # Left double quotation mark
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'"': "U+201D", # noqa 601 # Right double quotation mark
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"„": "U+201E", # Double low-9 quotation mark
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"‟": "U+201F", # Double high-reversed-9 quotation mark
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"«": "U+00AB", # Left-pointing double angle quotation mark
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"»": "U+00BB", # Right-pointing double angle quotation mark
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"❝": "U+275D", # Heavy double turned comma quotation mark ornament
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"❞": "U+275E", # Heavy double comma quotation mark ornament
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"⹂": "U+2E42", # Double low-reversed-9 quotation mark
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"🙶": "U+1F676", # SANS-SERIF HEAVY DOUBLE TURNED COMMA QUOTATION MARK ORNAMENT
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"🙷": "U+1F677", # SANS-SERIF HEAVY DOUBLE COMMA QUOTATION MARK ORNAMENT
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"🙸": "U+1F678", # SANS-SERIF HEAVY LOW DOUBLE COMMA QUOTATION MARK ORNAMENT
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"⠦": "U+2826", # Braille double closing quotation mark
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"⠴": "U+2834", # Braille double opening quotation mark
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"〝": "U+301D", # REVERSED DOUBLE PRIME QUOTATION MARK
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"〞": "U+301E", # DOUBLE PRIME QUOTATION MARK
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"〟": "U+301F", # LOW DOUBLE PRIME QUOTATION MARK
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"＂": "U+FF02", # FULLWIDTH QUOTATION MARK
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",,": "U+275E", # LOW HEAVY DOUBLE COMMA ORNAMENT
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}
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# Single Quotes Dictionary
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single_quotes = {
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"'": "U+0027", # noqa 601 # Standard typewriter/programmer's quote
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"'": "U+2018", # noqa 601 # Left single quotation mark
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"'": "U+2019", # noqa 601 # Right single quotation mark # noqa: W605
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"‚": "U+201A", # Single low-9 quotation mark
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"‛": "U+201B", # Single high-reversed-9 quotation mark
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"‹": "U+2039", # Single left-pointing angle quotation mark
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"›": "U+203A", # Single right-pointing angle quotation mark
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"❛": "U+275B", # Heavy single turned comma quotation mark ornament
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"❜": "U+275C", # Heavy single comma quotation mark ornament
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"「": "U+300C", # Left corner bracket
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"」": "U+300D", # Right corner bracket
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"『": "U+300E", # Left white corner bracket
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"』": "U+300F", # Right white corner bracket
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"﹁": "U+FE41", # PRESENTATION FORM FOR VERTICAL LEFT CORNER BRACKET
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"﹂": "U+FE42", # PRESENTATION FORM FOR VERTICAL RIGHT CORNER BRACKET
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"﹃": "U+FE43", # PRESENTATION FORM FOR VERTICAL LEFT WHITE CORNER BRACKET
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"﹄": "U+FE44", # PRESENTATION FORM FOR VERTICAL RIGHT WHITE CORNER BRACKET
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"＇": "U+FF07", # FULLWIDTH APOSTROPHE
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"｢": "U+FF62", # HALFWIDTH LEFT CORNER BRACKET
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"｣": "U+FF63", # HALFWIDTH RIGHT CORNER BRACKET
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}
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double_quote_standard = '"'
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single_quote_standard = "'"
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# Apply double quote replacements
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for unicode_val in double_quotes.values():
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unicode_char = unicode_to_char(unicode_val)
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if unicode_char in text:
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text = text.replace(unicode_char, double_quote_standard)
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# Apply single quote replacements
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for unicode_val in single_quotes.values():
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unicode_char = unicode_to_char(unicode_val)
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if unicode_char in text:
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text = text.replace(unicode_char, single_quote_standard)
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return text
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return text.translate(_TRANSLATION_TABLE)
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def unicode_to_char(unicode_val: str) -> str:
@@ -249,3 +234,12 @@ def unicode_to_char(unicode_val: str) -> str:
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str: The character corresponding to the Unicode value.
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"""
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return chr(int(unicode_val.replace("U+", ""), 16))
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for unicode_val in _DOUBLE_QUOTES.values():
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char_code = int(unicode_val.replace("U+", ""), 16)
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_TRANSLATION_TABLE[char_code] = ord('"')
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for unicode_val in _SINGLE_QUOTES.values():
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char_code = int(unicode_val.replace("U+", ""), 16)
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_TRANSLATION_TABLE[char_code] = ord("'")

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