From e9ca72237fdec698e025264a3e526350ca08b329 Mon Sep 17 00:00:00 2001
From: Charles Kerr <charles@transmissionbt.com>
Date: Wed, 19 Dec 2007 02:44:21 +0000
Subject: [PATCH] if tr_torrentStat() is called again in the same second for a
 torrent, return the cached value.

---
 libtransmission/internal.h | 1 +
 libtransmission/torrent.c  | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/libtransmission/internal.h b/libtransmission/internal.h
index 8ce58008f..9dc800f95 100644
--- a/libtransmission/internal.h
+++ b/libtransmission/internal.h
@@ -162,6 +162,7 @@ struct tr_torrent
 
     tr_recheck_state           recheckState;
 
+    time_t                     lastStatTime;
     tr_stat                    stats[2];
 
     tr_torrent               * next;
diff --git a/libtransmission/torrent.c b/libtransmission/torrent.c
index 08579a289..171076c39 100644
--- a/libtransmission/torrent.c
+++ b/libtransmission/torrent.c
@@ -713,6 +713,13 @@ tr_torrentStat( tr_torrent * tor )
 {
     tr_stat * s;
     struct tr_tracker * tc;
+    const time_t now = time( NULL );
+
+    /* generating these stats is expensive --
+     * update a maximum of once per second */
+    if( tor->lastStatTime == now )
+        return &tor->stats[tor->statCur];
+    tor->lastStatTime = now;
 
     tr_torrentLock( tor );