tree b62220677a7e354f5676c51b44c226283d4f689d
parent 731433c96ad09a58a533be0b439170c8d376aeee
author litao <litao_xidian@126.com> 1576671923 +0800
committer Jacky Li <jacky.likun@qq.com> 1577698863 +0800

[DOC][FAQ] add faq for how to deal with slow task

This closes #3514