From 22f64abaf2558946848702276d51eb72135b993c Mon Sep 17 00:00:00 2001
From: Enno Rehling <enno.rehling@gmail.com>
Date: Sun, 29 Jun 2014 19:04:30 -0700
Subject: [PATCH] caching get_race() calls

---
 src/kernel/race.c | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/src/kernel/race.c b/src/kernel/race.c
index fb71b046b..4648b3edf 100644
--- a/src/kernel/race.c
+++ b/src/kernel/race.c
@@ -61,6 +61,7 @@ OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 /** external variables **/
 race *races;
 int num_races = 0;
+static int cache_breaker;
 
 static const char *racenames[MAXRACES] = {
     "dwarf", "elf", NULL, "goblin", "human", "troll", "demon", "insect",
@@ -76,10 +77,23 @@ static const char *racenames[MAXRACES] = {
     "clone"
 };
 
+static race * race_cache[MAXRACES];
+
 struct race *get_race(race_t rt) {
-    assert(rt < MAXRACES);
-    if (racenames[rt]) {
-        return rc_get_or_create(racenames[rt]);
+    static int cache = -1;
+    if (cache_breaker != cache) {
+        cache = cache_breaker;
+        memset(race_cache, 0, sizeof(race_cache));
+        assert(rt < MAXRACES);
+        if (racenames[rt]) {
+            return race_cache[rt] = rc_get_or_create(racenames[rt]);
+        }
+    } else {
+        race * result = race_cache[rt];
+        if (!result) {
+            result = race_cache[rt] = rc_get_or_create(racenames[rt]);
+        }
+        return result;
     }
     return 0;
 }
@@ -180,6 +194,7 @@ race *rc_get_or_create(const char *zName)
         rc->attack[0].type = AT_COMBATSPELL;
         rc->attack[1].type = AT_NONE;
         rc->index = num_races++;
+        ++cache_breaker;
         rc->next = races;
         return races = rc;
     }