diff --git a/lib/request/comparison.py b/lib/request/comparison.py
index 0966c3695..0be79635e 100644
--- a/lib/request/comparison.py
+++ b/lib/request/comparison.py
@@ -132,8 +132,15 @@ def _comparison(page, headers, code, getRatioValue, pageLength):
             seq1 = seq1[count:]
             seq2 = seq2[count:]
 
-        seqMatcher.set_seq1(seq1)
-        seqMatcher.set_seq2(seq2)
+        while True:
+            try:
+                seqMatcher.set_seq1(seq1)
+                seqMatcher.set_seq2(seq2)
+            except MemoryError:
+                seq1 = seq1[:len(seq1) / 4]
+                seq2 = seq2[:len(seq2) / 4]
+            else:
+                break
 
         ratio = round(seqMatcher.quick_ratio(), 3)