Very slow bash completion sourcing about rclone HOT 2 CLOSED

from collections import defaultdict

in_path = "/tmp/rclone"
out_path = "/tmp/rclone-small"

with open(in_path) as f:
    script = f.read()

line_locs = defaultdict(list)
for loc, line in enumerate(script.splitlines(keepends=True)):
    line_locs[line].append(loc)

chunks = []
prev_locs = []
for line, locs in line_locs.items():
    if locs != [loc + 1 for loc in prev_locs]:
        chunk_lines = []
        chunks.append((chunk_lines, len(locs)))
    chunk_lines.append(line)
    prev_locs = locs

chunk_id = 0
for chunk_lines, chunk_reps in chunks:
    chunk_size = len(chunk_lines)
    ratio = (chunk_size + chunk_reps) / (chunk_size * chunk_reps)
    if ratio < 0.5:
        chunk_text = ''.join(chunk_lines)
        chunk_fun = f"chunk_{chunk_id}"
        script = script.replace(chunk_text, f"    {chunk_fun}\n")
        script += f"\n{chunk_fun}() {{\n{chunk_text}}}\n"
        chunk_id += 1

with open(out_path, "w") as f:
    f.write(script)