Shared/Logs: Improve log performances

Improve Log::ShouldLog() performances by saving the lowest log level across all loggers and discarding any log with lower level than that.

(cherry picked from commit 003d67708b9a279da3d37e5ef06eb32ceab53964)

1 files changed, 5 insertions, 0 deletions

diff --git a/src/server/shared/Logging/Log.h b/src/server/shared/Logging/Log.h
index 1d67ff87f76..408381620f7 100644
--- a/src/server/shared/Logging/Log.h
+++ b/src/server/shared/Logging/Log.h
@@ -82,6 +82,7 @@ class Log
         AppenderMap appenders;
         LoggerMap loggers;
         uint8 AppenderId;
+        LogLevel lowestLogLevel;
 
         std::string m_logsDir;
         std::string m_logsTimestamp;
@@ -113,6 +114,10 @@ inline bool Log::ShouldLog(std::string const& type, LogLevel level) const
     // Speed up in cases where requesting "Type.sub1.sub2" but only configured
     // Logger "Type"
 
+    // Don't even look for a logger if the LogLevel is lower than lowest log levels across all loggers
+    if (level < lowestLogLevel)
+        return false;
+
     Logger const* logger = GetLoggerByType(type);
     if (!logger)
         return false;