From 75ee9eb9c60cc85925d2bfe9f92f2b2da81ddefd Mon Sep 17 00:00:00 2001
From: Raymond Hettinger <python@rcn.com>
Date: Mon, 16 Jun 2008 01:49:18 +0000
Subject: Issue #3116 and #1792: Fix quadratic behavior in marshal.dumps().

---
 Python/marshal.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'Python/marshal.c')

diff --git a/Python/marshal.c b/Python/marshal.c
index 897c15ec8a..c305bbe47c 100644
--- a/Python/marshal.c
+++ b/Python/marshal.c
@@ -65,7 +65,10 @@ w_more(int c, WFILE *p)
 	if (p->str == NULL)
 		return; /* An error already occurred */
 	size = PyString_Size(p->str);
-	newsize = size + 1024;
+	newsize = size + size + 1024;
+	if (newsize > 32*1024*1024) {
+		newsize = size + (size >> 3);	/* 12.5% overallocation */
+	}
 	if (_PyString_Resize(&p->str, newsize) != 0) {
 		p->ptr = p->end = NULL;
 	}
-- 
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