Speedup INFO server section.

src/release.c

@@ -32,6 +32,7 @@
  * files using this functions. */
 
 #include <string.h>
+#include <stdio.h>
 
 #include "release.h"
 #include "version.h"
@@ -50,3 +51,16 @@ uint64_t redisBuildId(void) {
 
     return crc64(0,(unsigned char*)buildid,strlen(buildid));
 }
+
+/* Return a cached value of the build string in order to avoid recomputing
+ * and converting it in hex every time: this string is shown in the INFO
+ * output that should be fast. */
+char *redisBuildIdString(void) {
+    static char buf[32];
+    static int cached = 0;
+    if (!cached) {
+        snprintf(buf,sizeof(buf),"%llx",(unsigned long long) redisBuildId());
+        cached = 1;
+    }
+    return buf;
+}

src/server.c

@@ -3892,32 +3892,32 @@ sds genRedisInfoString(char *section) {
             call_uname = 0;
         }
 
-        info = sdscatprintf(info,
+        info = sdscatfmt(info,
             "# Server\r\n"
             "redis_version:%s\r\n"
             "redis_git_sha1:%s\r\n"
-            "redis_git_dirty:%d\r\n"
-            "redis_build_id:%llx\r\n"
+            "redis_git_dirty:%i\r\n"
+            "redis_build_id:%s\r\n"
             "redis_mode:%s\r\n"
             "os:%s %s %s\r\n"
-            "arch_bits:%d\r\n"
+            "arch_bits:%i\r\n"
             "multiplexing_api:%s\r\n"
             "atomicvar_api:%s\r\n"
-            "gcc_version:%d.%d.%d\r\n"
-            "process_id:%ld\r\n"
+            "gcc_version:%i.%i.%i\r\n"
+            "process_id:%I\r\n"
             "run_id:%s\r\n"
-            "tcp_port:%d\r\n"
-            "uptime_in_seconds:%jd\r\n"
-            "uptime_in_days:%jd\r\n"
-            "hz:%d\r\n"
-            "configured_hz:%d\r\n"
-            "lru_clock:%ld\r\n"
+            "tcp_port:%i\r\n"
+            "uptime_in_seconds:%I\r\n"
+            "uptime_in_days:%I\r\n"
+            "hz:%i\r\n"
+            "configured_hz:%i\r\n"
+            "lru_clock:%u\r\n"
             "executable:%s\r\n"
             "config_file:%s\r\n",
             REDIS_VERSION,
             redisGitSHA1(),
             strtol(redisGitDirty(),NULL,10) > 0,
-            (unsigned long long) redisBuildId(),
+            redisBuildIdString(),
             mode,
             name.sysname, name.release, name.machine,
             server.arch_bits,
@@ -3928,14 +3928,14 @@ sds genRedisInfoString(char *section) {
 #else
             0,0,0,
 #endif
-            (long) getpid(),
+            (int64_t) getpid(),
             server.runid,
             server.port,
-            (intmax_t)uptime,
-            (intmax_t)(uptime/(3600*24)),
+            (int64_t)uptime,
+            (int64_t)(uptime/(3600*24)),
             server.hz,
             server.config_hz,
-            (unsigned long) server.lruclock,
+            server.lruclock,
             server.executable ? server.executable : "",
             server.configfile ? server.configfile : "");
     }

src/server.h

@@ -2140,6 +2140,7 @@ void dictSdsDestructor(void *privdata, void *val);
 char *redisGitSHA1(void);
 char *redisGitDirty(void);
 uint64_t redisBuildId(void);
+char *redisBuildIdString(void);
 
 /* Commands prototypes */
 void authCommand(client *c);