[
https://issues.apache.org/jira/browse/LUCENENET-292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12781078#action_12781078
]
Nicholas Paldino commented on LUCENENET-292:
--------------------------------------------
George,
Should a new patch be made, or was that statement for future reference?
If so, should the optimization be left out? I ask because given that
performance is a tenant of Lucene.NET (as it is in Java), and because this will
not affect the call site of code that uses this class, it would seem natural
for all of it to be included.
If not, then the previous sentence is moot. =)
- Nick
> Optimization of EquatableList<T>
> --------------------------------
>
> Key: LUCENENET-292
> URL: https://issues.apache.org/jira/browse/LUCENENET-292
> Project: Lucene.Net
> Issue Type: Improvement
> Reporter: Nicholas Paldino
> Priority: Minor
> Attachments: EquatableList3.patch, SupportClass.patch
>
>
> When comparing two IEnumerable<T> implementations, a shortcut can be taken to
> check to see if both IEnumerable<T> expose operations which returns a count
> of items (sequences cannot be equal if the number of elements in the
> sequences are not equal).
> Typically, in .NET, this is expressed through the implementation of the
> ICollection or ICollection<T> interface.
> Before enumerating through each element and comparing the two for equality,
> if the counts are accessible, they should be compared to see if the number of
> elements in the two sequences are equal. If a comparison is able to be made
> before enumerating, it will be much more performant for comparisons of
> sequences where each is ~N, but both are not equal to N, and N is very large.
> Patch to follow.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
