parallel scan (#74)

[zhoucan1990]

trafficstars

Co-authored-by: yique.wc [email protected]

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
4 out of 10 committers have signed the CLA.

:white_check_mark: chuanwang66
:white_check_mark: Actimermao
:white_check_mark: elya-alibaba
:white_check_mark: zhenghaozzz
:x: whybert
:x: danielxiaoran
:x: lutaoact
:x: wanttobeamaster
:x: zikuang.lt
:x: yunjinlxp

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zikuang.lt seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}