YLogger

YLogger is cross platform logging project based c++17.

This is very simple and single header logging.
Also YLogger is thread-safe, fast, light.

YLogger support ConsoleAppender, FileAppender, RollingAppender.

It can use very easy. Basic settings can be made simply by creating a conig file.

Feature

Support FileAppender/ConsoleAppender
Support log file save path
Fast
Easy to use
Simple
Single header

Example code

#include "YLogger.h" // only include single header file

void func1(int i) {
    LOG_DEBUG("로그 - " + std::to_string(i));
}

void func2(int i) {
    LOG_INFO("로그2 - " + std::to_string(i));
}

int main() {
    system("chcp 949");

    // Default config, Not essential. default is logger::LogLevel::Debug
    //logger::YLogger::Initialize(); 

    // Set logger level logger::LogLevel::Info. So, The logger does not show logs below the info level.
    logger::YLogger::Initialize(logger::LogLevel::Info); 

    // Set logger to console
    logger::YLogger::GetLogger()->AddLogger(logger::LoggerType::ConsoleAppender);

    // Default save ./Log
    logger::YLogger::GetLogger()->AddLogger(logger::LoggerType::FileAppender);

    // Set save log file path
    logger::YLogger::GetLogger()->AddLogger(logger::LoggerType::FileAppender, "./temp2");

    std::cout << "FileAppender write 100 lines" << std::endl;

    for (int i = 0; i < 100; i++) {
        std::thread tt([i]() {
            // thread-safe log
            if (i % 2 == 0) {
                func1(i);
            }
            else {
                func2(i);
            }
            });
        tt.detach();
    }

    return 0;
}

You can use YLogger just by initialize it.

Sample image

There are some sample images. g++ build with g++ Main.cpp YLogger.h -std=c++17 -pthread -o ylogger_example.out command.

Windows ConsoleAppender

Ubnutu ConsoleAppender

Windows FileAppender

Ubnutu FileAppender

Performance

SingleThread

The test is based on an average value of five measurements of the time taken when 100,000 logs were recorded in a single thread.

FileAppender write 100,000 lines
350ms

ConsoleAppender write 100,000 lines
14767ms

MultiThread

The test is based on an average value of five measurements of the time taken when 1 log in each 100,000 threads were recorded in a multi thread include create thread time.

FileAppender write 100,000 lines
5575ms

ConsoleAppender write 100,000 lines
25310ms

TODO

Support Thread pool for multi appender
Support Rolling Appender(zip files, clean up...)

dydtjr1128 / YLogger