#include <log4cpp/Category.hh>
#include <log4cpp/Appender.hh>
#include <log4cpp/OstreamAppender.hh>
#include <log4cpp/Layout.hh>
#include <log4cpp/PatternLayout.hh>
#include <log4cpp/Priority.hh>

#include "LoggerFactory.h"

using namespace Log;

bool LoggerFactory::isCreated = false;
log4cpp::Category *LoggerFactory::instance;

LoggerFactory::LoggerFactory() {}

/* Factory for a simple log4cpp logger. */
log4cpp::Category* LoggerFactory::create() {
    log4cpp::Category *logger = &log4cpp::Category::getRoot();
    log4cpp::Appender *p_appender = new log4cpp::OstreamAppender("console", &std::cout);
    log4cpp::PatternLayout *layout = new log4cpp::PatternLayout();
    layout->setConversionPattern("%d{%Y-%m-%d %H:%M:%S} [%p] %c: %m%n");
    p_appender->setLayout(layout);

    logger->setPriority(log4cpp::Priority::INFO);
    logger->addAppender(p_appender);
    return logger;
}

/* Returns a singleton root logger. */
log4cpp::Category *LoggerFactory::getLogger() {
    if (!isCreated) {
        isCreated = true;
        instance = create();
    }
    return instance;
}
#include <log4cpp/Category.hh>
#include <log4cpp/Appender.hh>
#include <log4cpp/OstreamAppender.hh>
#include <log4cpp/Layout.hh>
#include <log4cpp/PatternLayout.hh>
#include <log4cpp/Priority.hh>

#include "LoggerFactory.h"

using namespace Log;

bool LoggerFactory::isCreated = false;
log4cpp::Category *LoggerFactory::instance;

LoggerFactory::LoggerFactory() {}

/* Factory for a simple log4cpp logger. */
log4cpp::Category* LoggerFactory::create() {
    log4cpp::Category *logger = &log4cpp::Category::getRoot();
    log4cpp::Appender *p_appender = new log4cpp::OstreamAppender("console", &std::cout);
    log4cpp::PatternLayout *layout = new log4cpp::PatternLayout();
    layout->setConversionPattern("%d{%Y-%m-%d %H:%M:%S} [%p] %c: %m%n");
    p_appender->setLayout(layout);

    logger->setPriority(log4cpp::Priority::DEBUG);
    logger->addAppender(p_appender);
    return logger;
}

/* Returns a singleton root logger. */
log4cpp::Category *LoggerFactory::getLogger() {
    if (!isCreated) {
        isCreated = true;
        instance = create();
    }
    return instance;
}
--- 
+++ 
@@ -22,7 +22,7 @@
     layout->setConversionPattern("%d{%Y-%m-%d %H:%M:%S} [%p] %c: %m%n");
     p_appender->setLayout(layout);
 
-    logger->setPriority(log4cpp::Priority::DEBUG);
+    logger->setPriority(log4cpp::Priority::INFO);
     logger->addAppender(p_appender);
     return logger;
 }
Change logging level to INFO (DEBUG is slowing down the execution too much).
