阅读列表2016.4

1. Properly Scoping lua-nginx-module’s ngx.ctx

参见：per-request context tables ，shared memory zones
也是对下文的反思和总结

1. OpenResty Performance – ngx.ctx vs ngx.shared.dict

作者新文章说：Silly me - our examination of the usage of hitting ngx.ctx is pretty naive.