diff --git a/day09.py b/day09.py
index 5092aa3..8faa0d5 100644
--- a/day09.py
+++ b/day09.py
@@ -8,14 +8,12 @@ TEST_SOLUTION_PART2 = 62
 
 def part1(test_mode=False):
     my_input = aoclib.getInputAsArray(day=DAY, return_type=int, test=test_mode)
-    if test_mode:
-        preamble = 5
-    else:
-        preamble = 25
+    max_buffer_size = 5 if test_mode else 25
 
     number_buffer = []
     for number in my_input:
-        if len(number_buffer) == preamble:
+        current_buffer_size = len(number_buffer)
+        if current_buffer_size == max_buffer_size:
             found_sum = False
             for combination in itertools.combinations(number_buffer, 2):
                 if sum(combination) == number:
@@ -26,7 +24,7 @@ def part1(test_mode=False):
                 return number
 
         number_buffer.append(number)
-        if len(number_buffer) > preamble:
+        if current_buffer_size + 1 > max_buffer_size:
             number_buffer = number_buffer[1:]
 
     return 0
@@ -38,6 +36,9 @@ def part2(test_mode=False):
 
     for start_index in range(0, len(my_input)):
         for stop_index in range(start_index + 1, len(my_input) - start_index - 1):
+            if my_input[stop_index] == sum_to_find:
+                break
+
             if sum(my_input[start_index:stop_index]) == sum_to_find:
                 return min(my_input[start_index:stop_index]) + max(my_input[start_index:stop_index])