# Array\_Type performance

**URL:** <https://discuss.elastic.co/t/array-type-performance/3886>\
**Category:** Elasticsearch\
**Created:** [February 5, 2011, 12:17am UTC](https://discuss.elastic.co/t/array-type-performance/3886 "2011-02-05T00:17:41Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Paul\_Loy](https://avatars.discourse-cdn.com/v4/letter/p/ad7895/32.png) [@Paul\_Loy](https://discuss.elastic.co/u/Paul_Loy)\
**Post date:** [February 5, 2011, 12:17am UTC](https://discuss.elastic.co/t/array-type-performance/3886/1 "2011-02-05T00:17:41Z")

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Hi,

I'm looking at adding a tag-based filter to one of my queries. I was  
wondering how the array\_type mapping actually worked, and what the  
performance implications may me.

e.g. I'm using this for my mapping of tags, as per the example:

"tags" : {"type" : "string", "index\_name" : "tag"}

Thanks,

Paul.

## --

Paul Loy  
[paul@keteracel.com](mailto:paul@keteracel.com)  
[http://uk.linkedin.com/in/paulloy](http://uk.linkedin.com/in/paulloy)

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<div class="post-metadata">

**Author:** ![kimchy](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/kimchy/32/44952_2.png) [@kimchy](https://discuss.elastic.co/u/kimchy)\
**Post date:** [February 7, 2011, 6:11pm UTC](https://discuss.elastic.co/t/array-type-performance/3886/2 "2011-02-07T18:11:15Z")

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There is no perf implications, especially if you use it as a filter.  
On Saturday, February 5, 2011 at 2:17 AM, Paul Loy wrote:

> Hi,
> 
> I'm looking at adding a tag-based filter to one of my queries. I was wondering how the array\_type mapping actually worked, and what the performance implications may me.
> 
> e.g. I'm using this for my mapping of tags, as per the example:
> 
> "tags" : {"type" : "string", "index\_name" : "tag"}
> 
> Thanks,
> 
> Paul.
> 
> ## --
> 
> Paul Loy  
> [paul@keteracel.com](mailto:paul@keteracel.com)  
> [http://uk.linkedin.com/in/paulloy](http://uk.linkedin.com/in/paulloy)

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<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 4:12am UTC](https://discuss.elastic.co/t/array-type-performance/3886/3 "2017-07-06T04:12:28Z")

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Closed on July 6, 2017, 4:12am UTC