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⚡ Bolt: Fast substring checks before log regex matching #48

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Merged
kastnerp merged 1 commit into from
Jun 18, 2026
Merged

⚡ Bolt: Fast substring checks before log regex matching #48

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8 changes: 7 additions & 1 deletion openfoam_residuals/filesystem.py
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Original file line number Diff line number Diff line change
Expand Up @@ -168,7 +168,10 @@ def _parse_openfoam_log(file: Path) -> tuple[pd.DataFrame, pd.Series]:

with file.open(encoding="utf-8") as f:
for line in f:
if _LOG_TIME_RE.match(line):
# ⚡ Bolt: Fast substring checks before expensive regex matches.
# `in` is implemented in C and highly optimized, bypassing the
# regex engine entirely for the vast majority of log lines.
if "Time =" in line and _LOG_TIME_RE.match(line):
if current_row:
rows.append(current_row)
indices.append(time_step)
Expand All @@ -179,6 +182,9 @@ def _parse_openfoam_log(file: Path) -> tuple[pd.DataFrame, pd.Series]:
if current_row is None:
continue

if "Solving for" not in line:
continue

solve_match = _LOG_SOLVE_RE.match(line)
if solve_match is None:
continue
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