# Way to construct multi-key ImmutableDict

**URL:** <https://discourse.julialang.org/t/way-to-construct-multi-key-immutabledict/10294>\
**Category:** General Usage\
**Tags:** question\
**Created:** [April 12, 2018, 2:25am UTC](https://discourse.julialang.org/t/way-to-construct-multi-key-immutabledict/10294 "2018-04-12T02:25:52Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![djsegal](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/djsegal/32/13752_2.png) [@djsegal](https://discourse.julialang.org/u/djsegal)\
**Post date:** [April 12, 2018, 4:22am UTC](https://discourse.julialang.org/t/way-to-construct-multi-key-immutabledict/10294/3 "2018-04-12T04:22:14Z")

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Is there a way to combine this with:

> [@Stack overflow when merging 50000 dicts](https://discourse.julialang.org/t/stack-overflow-when-merging-50000-dicts/10222/2):
>
> Okay, found a solution: merge!(Dict(), a...) is very fast…

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