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https://issues.apache.org/jira/browse/ZOOKEEPER-3063?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yisong Yue updated ZOOKEEPER-3063:
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Description:
Outstanding changes are tracked with an ArrayList, which has O(N) remove from
head (and possibly add) performance. This means that as we get further behind,
we will slow down the processing of outstanding changes, which would make us
get further behind.
We should switch to using ArrayDeque which achieves O(1) add and remove on
both ends, which should result in much happiness.
was:
Outstanding changes are tracked with an ArrayList, which has O(n) remove from
head (and possibly add) performance. This means that as we get further behind,
we will slow down the processing of outstanding changes, which would make us
get further behind.
We should switch to using ArrayDeque which achieves O(1) add and remove on both
ends, which should result in much happiness.
> track outstanding changes with ArrayDeque
> -----------------------------------------
>
> Key: ZOOKEEPER-3063
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3063
> Project: ZooKeeper
> Issue Type: Improvement
> Components: server
> Reporter: Yisong Yue
> Assignee: Yisong Yue
> Priority: Trivial
> Fix For: 3.6.0
>
>
> Outstanding changes are tracked with an ArrayList, which has O(N) remove from
> head (and possibly add) performance. This means that as we get further
> behind, we will slow down the processing of outstanding changes, which would
> make us get further behind.
> We should switch to using ArrayDeque which achieves O(1) add and remove on
> both ends, which should result in much happiness.
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