From a1a8e1fc48dcc5724bb3ea16cf06d707c48f1c21 Mon Sep 17 00:00:00 2001
From: Alden Torres <aldenml@gmail.com>
Date: Mon, 3 Aug 2015 00:34:11 -0400
Subject: [PATCH] Avoid performance penalty if disk write access log is not
 enable.

---
 src/file.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/file.cpp b/src/file.cpp
index 513f86569..20d49d164 100644
--- a/src/file.cpp
+++ b/src/file.cpp
@@ -62,6 +62,7 @@ POSSIBILITY OF SUCH DAMAGE.
 
 #ifdef TORRENT_DISK_STATS
 #include "libtorrent/io.hpp"
+#include "libtorrent/storage.hpp"
 #endif
 
 #include <sys/stat.h>
@@ -1274,6 +1275,8 @@ namespace libtorrent
 #ifdef TORRENT_DISK_STATS
 	boost::uint32_t silly_hash(std::string const& str)
 	{
+		if (!default_storage::disk_write_access_log()) return 0;
+
 		boost::uint32_t ret = 1;
 		for (int i = 0; i < str.size(); ++i)
 		{