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⚡️ Speed up function is_tex_string by 84% #153

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⚡️ Speed up function is_tex_string by 84% #153

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20 changes: 12 additions & 8 deletions src/bokeh/embed/util.py
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,14 @@
from ..core.types import ID
from ..document.document import DocJson

_dollars = r"\$\$.*?\$\$"

_braces = r"\\\[.*?\\\]"

_parens = r"\\\(.*?\\\)"

_pat = re.compile(f"^({_dollars}|{_braces}|{_parens})$", flags=re.S)

#-----------------------------------------------------------------------------
# Globals and constants
#-----------------------------------------------------------------------------
Expand Down Expand Up @@ -351,20 +359,16 @@ def submodel_has_python_callbacks(models: Sequence[Model | Document]) -> bool:
return has_python_callback

def is_tex_string(text: str) -> bool:
''' Whether a string begins and ends with MathJax default delimiters
""" Whether a string begins and ends with MathJax default delimiters


Args:
text (str): String to check

Returns:
bool: True if string begins and ends with delimiters, False if not
'''
dollars = r"^\$\$.*?\$\$$"
braces = r"^\\\[.*?\\\]$"
parens = r"^\\\(.*?\\\)$"

pat = re.compile(f"{dollars}|{braces}|{parens}", flags=re.S)
return pat.match(text) is not None
"""
return _pat.match(text) is not None

def contains_tex_string(text: str) -> bool:
''' Whether a string contains any pair of MathJax default delimiters
Expand Down