tree ba6124b7157bde884a1a56ae3c2d7a7587b718b8
parent f9b7e815416df70e77a8b01e918d1f8b9ccb456a
author Wu Sheng <wu.sheng@foxmail.com> 1583032079 +0800
committer Wu Sheng <wu.sheng@foxmail.com> 1583032079 +0800

Add more comments, and span.log to the core API.