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David Capwell commented on CASSANDRA-15765: ------------------------------------------- is there a code path you are seeing which doesn't use a list which supports random access? Is this a potential performance issue or a monitored issue (and if so under which code path)? > 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 linear, 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