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https://issues.apache.org/jira/browse/SOLR-11391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16177410#comment-16177410
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Varun Thacker commented on SOLR-11391:
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Very quick benchmarks on my local machine
In indexed 3M documents . The cardinality of VIN_s is 1.5M
3M matches
{!join from=VIN_s to=VIN_s cache=false}*:* : 2 seconds
{!graph from=VIN_s to=VIN_s cache=false}*:* : 4 seconds
2M matches
{!join from=VIN_s to=VIN_s cache=false}VIN_i:[0 TO 2000000] : 1.8 seconds
{!graph from=VIN_s to=VIN_s cache=false}VIN_i:[0 TO 2000000] : 4 seconds
1M matches
{!join from=VIN_s to=VIN_s cache=false}VIN_i:[0 TO 1000000] : 1.4 seconds
{!graph from=VIN_s to=VIN_s cache=false}VIN_i:[0 TO 1000000] : 2.9 seconds
500k matches
{!join from=VIN_s to=VIN_s cache=false}VIN_i:[0 TO 500000] : 1 seconds
{!graph from=VIN_s to=VIN_s cache=false}VIN_i:[0 TO 500000] : 1.2
250k matches
{!join from=VIN_s to=VIN_s cache=false}VIN_i:[0 TO 250000] : .9seconds
{!graph from=VIN_s to=VIN_s cache=false}VIN_i:[0 TO 250000] : .6seconds
10k matches
{!join from=VIN_s to=VIN_s cache=false}VIN_i:[0 TO 10000] : .7seconds
{!graph from=VIN_s to=VIN_s cache=false}VIN_i:[0 TO 10000] : .03
So we might want to keep a threshold and use the appropriate algorithm.
> JoinQParser for non point fields should use the GraphTermsCollector
> --------------------------------------------------------------------
>
> Key: SOLR-11391
> URL: https://issues.apache.org/jira/browse/SOLR-11391
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Varun Thacker
> Attachments: SOLR-11391.patch
>
>
> The Join Query Parser uses the GraphPointsCollector for point fields.
> For non point fields if we use the GraphTermsCollector instead of the current
> algorithm I am seeing quite a bit of performance gains.
> I'm going to attach a quick patch which I cooked up , making sure TestJoin
> and TestCloudJSONFacetJoinDomain passed.
> More tests, benchmarking and code cleanup to follow
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