From 626d8a42a1fc02d18598f9a59903e5b58549502a Mon Sep 17 00:00:00 2001
From: Mark Salyzyn <salyzyn@google.com>
Date: Fri, 2 Oct 2015 10:00:38 -0700
Subject: liblog: optimize code hotspot

strcmp was 1/10 #2 behind find_property in __android_log_level(),
now virtually eliminated from performance profile.

Bug: 23685592
Change-Id: I3978886193af77e489c6d1728d6a26b7f53f8f2f
---
 liblog/log_is_loggable.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'liblog')

diff --git a/liblog/log_is_loggable.c b/liblog/log_is_loggable.c
index 7a8e33f..cd85ff6 100644
--- a/liblog/log_is_loggable.c
+++ b/liblog/log_is_loggable.c
@@ -93,7 +93,7 @@ static int __android_log_level(const char *tag, int def)
     if (taglen) {
         uint32_t current_local_serial = current_global_serial;
 
-        if (!last_tag || strcmp(last_tag, tag)) {
+        if (!last_tag || (last_tag[0] != tag[0]) || strcmp(last_tag + 1, tag + 1)) {
             /* invalidate log.tag.<tag> cache */
             for(i = 0; i < (sizeof(tag_cache) / sizeof(tag_cache[0])); ++i) {
                 tag_cache[i].pinfo = NULL;
-- 
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