[
https://issues.apache.org/jira/browse/CASSANDRA-15765?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Yifan Cai updated CASSANDRA-15765:
----------------------------------
Change Category: Performance
Complexity: Normal
Status: Open (was: Triage Needed)
> Get-by-index introduced in CASSANDRA-15394 could have negative performance
> impact on non-RandomAccess List
> ----------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-15765
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15765
> Project: Cassandra
> Issue Type: Improvement
> Components: Legacy/Core
> Reporter: Yifan Cai
> Assignee: Yifan Cai
> Priority: Normal
>
> CASSANDRA-15394 replaced the iterator based iteration with the get-by-index
> one to avoid allocation iterators.
> It works for the lists that support RandomAccess, i.e. the big O of {{get()}}
> is {{O(1)}}.
> However, it fails when the list does not support RandomAccess. The {{get()}}
> method's time complexity can be {{O(n)}}, and it leads to {{O(n^2)}} for the
> overall iteration.
> The implementation should provide different behaviors based on the property.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org
For additional commands, e-mail: commits-h...@cassandra.apache.org
