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⚡️ Speed up method StandaloneCallTransformer._parse_bracket_standalone_call by 147% in PR #1523 (feat/js-dot-call-instrumentation) #1526

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⚡️ Speed up method StandaloneCallTransformer._parse_bracket_standalone_call by 147% in PR #1523 (feat/js-dot-call-instrumentation) #1526

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1502b4d
Optimize StandaloneCallTransformer._parse_bracket_standalone_call
codeflash-ai[bot] Feb 18, 2026
801c709
style: fix trailing whitespace in instrument.py
github-actions[bot] Feb 18, 2026
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19 changes: 13 additions & 6 deletions codeflash/languages/javascript/instrument.py
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Original file line number Diff line number Diff line change
Expand Up @@ -179,6 +179,9 @@ def __init__(self, function_to_optimize: FunctionToOptimize, capture_func: str)
# Captures: (whitespace)(await )?(object.)*func_name.call(
self._dot_call_pattern = re.compile(rf"(\s*)(await\s+)?((?:\w+\.)*){re.escape(self.func_name)}\.call\s*\(")

# Precompile regex to find next special character (quotes or parentheses)
self._special_re = re.compile(r'["\'`()]')

def transform(self, code: str) -> str:
"""Transform all standalone calls in the code."""
result: list[str] = []
Expand Down Expand Up @@ -380,13 +383,18 @@ def _find_balanced_parens(self, code: str, open_paren_pos: int) -> tuple[str | N
s_len = len(s)
quotes = "\"'`"

special_re = self._special_re

while pos < s_len and depth > 0:
char = s[pos]
match = special_re.search(s, pos)
if not match:
return None, -1

char = match.group()
char_pos = match.start()

# Handle string literals
# Note: preserve original escaping semantics (only checks immediate preceding char)
if char in quotes:
prev_char = s[pos - 1] if pos > 0 else None
prev_char = s[char_pos - 1] if char_pos > 0 else None
if prev_char != "\\":
if not in_string:
in_string = True
Expand All @@ -400,12 +408,11 @@ def _find_balanced_parens(self, code: str, open_paren_pos: int) -> tuple[str | N
elif char == ")":
depth -= 1

pos += 1
pos = char_pos + 1

if depth != 0:
return None, -1

# slice once
return s[open_paren_pos + 1 : pos - 1], pos

def _parse_bracket_standalone_call(self, code: str, match: re.Match[str]) -> StandaloneCallMatch | None:
Expand Down
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