rgw/rgw_usage.cc use empty() to check for emptiness

Use !empty() instead of 'size()' to check for emptiness for
performance reasons.

Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>

diff --git a/src/rgw/rgw_usage.cc b/src/rgw/rgw_usage.cc
index 054abc2c33496151affa725179ac293f5303e5be..f5016913b6810ca3fb29b322e040a382d1666fad 100644 (file)
--- a/src/rgw/rgw_usage.cc
+++ b/src/rgw/rgw_usage.cc
@@ -14,7 +14,7 @@ static void dump_usage_categories_info(Formatter *formatter, const rgw_usage_log
   formatter->open_array_section("categories");
   map<string, rgw_usage_data>::const_iterator uiter;
   for (uiter = entry.usage_map.begin(); uiter != entry.usage_map.end(); ++uiter) {
-    if (categories && categories->size() && !categories->count(uiter->first))
+    if (categories && !categories->empty() && !categories->count(uiter->first))
       continue;
     const rgw_usage_data& usage = uiter->second;
     formatter->open_object_section("entry");