You can improve the performance by order of magnitude if you add cache

[larytet]

The idea is than when the golog.Println() is called the first time the system processes the format string and caches all required for the processing information (callbacks, format data, data types). The subsequent calls just check the cache and push the pre formatted data out. The code spends time only with the variadic part of the arguments.

See this prove of concept https://github.com/larytet/binlog