LeslieLog: aims to be async, fast, crash safe.

1. compressed output
2. async thread to perform the print,
3. lock-free SPSC message queue (one async logger in on program)

CodeStyle: Google C++ Style Guide

1. expose unified api
2. provided some option: compressed, Lazy Format

SPSC

1. Reader thread should know the logger in some way
2. Logger should take care of sinks