Merge pull request alibaba#347 from wenshao/master

0.2.20

add benchmark test

Merge pull request alibaba#328 from wenshao/master

0.2.7

Merge pull request alibaba#300 from wenshao/master

improve WallFilter

Merge pull request alibaba#282 from wenshao/master

0.2.15

Merge pull request alibaba#281 from wenshao/master

0.2.14

Merge pull request alibaba#254 from wenshao/master

0.2.11

Merge pull request alibaba#243 from wenshao/master

0.2.10

Merge pull request alibaba#211 from wenshao/master

0.2.9