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py/makeqstrdefs.py: Optimise by using compiled re's so it runs faster.

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By using pre-compiled regexs, using startswith(), and explicitly checking
for empty lines (of which around 30% of the input lines are), automatic
qstr extraction is speed up by about 10%.
This commit is contained in:
Damien George 2018-03-16 23:54:06 +11:00
parent 06aa13c350
commit f6a1f18603
1 changed files with 7 additions and 3 deletions
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10
py/makeqstrdefs.py
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@ -24,12 +24,16 @@ def write_out(fname, output):
f.write("\n".join(output) + "\n")
def process_file(f):
re_line = re.compile(r"#[line]*\s\d+\s\"([^\"]+)\"")
re_qstr = re.compile(r'MP_QSTR_[_a-zA-Z0-9]+')
output = []
last_fname = None
for line in f:
if line.isspace():
continue
# match gcc-like output (# n "file") and msvc-like output (#line n "file")
if line and (line[0:2] == "# " or line[0:5] == "#line"):
m = re.match(r"#[line]*\s\d+\s\"([^\"]+)\"", line)
if line.startswith(('# ', '#line')):
m = re_line.match(line)
assert m is not None
fname = m.group(1)
if not fname.endswith(".c"):
@ -39,7 +43,7 @@ def process_file(f):
output = []
last_fname = fname
continue
for match in re.findall(r'MP_QSTR_[_a-zA-Z0-9]+', line):
for match in re_qstr.findall(line):
name = match.replace('MP_QSTR_', '')
if name not in QSTRING_BLACK_LIST:
output.append('Q(' + name + ')')