From c9141da37ae1911cc9caad5bb15b885aedcce6d3 Mon Sep 17 00:00:00 2001
From: Heiko Ludwig <heiko.ludwig@mpinat.mpg.de>
Date: Tue, 3 Dec 2024 20:38:58 +0100
Subject: [PATCH] compile regex pattern only once

---
 day_03/program.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/day_03/program.py b/day_03/program.py
index e990273..bd5f517 100755
--- a/day_03/program.py
+++ b/day_03/program.py
@@ -12,8 +12,9 @@ def get_lines(filename: str) -> list:
 
 def part1_get_result_sum(lines: list) -> int:
     result_sum = 0
+    pattern = re.compile(r"mul\((\d+),(\d+)\)")
     for line in lines:
-        matches = re.findall(r"mul\((\d+),(\d+)\)", line)
+        matches = re.findall(pattern, line)
         for match in matches:
             result_sum += int(match[0]) * int(match[1])
     return result_sum