# IndexedTables and type-stability of IndexedTables.groupby

**URL:** <https://discourse.julialang.org/t/indexedtables-and-type-stability-of-indexedtables-groupby/30186>\
**Category:** New to Julia\
**Tags:** type-stability\
**Created:** [October 22, 2019, 8:05pm UTC](https://discourse.julialang.org/t/indexedtables-and-type-stability-of-indexedtables-groupby/30186 "2019-10-22T20:05:54Z")\
**Posts on this page:** 1\
**Showing post:** 7

<div class="post-metadata">

**Author:** ![bashonubuntu](https://avatars.discourse-cdn.com/v4/letter/b/f19dbf/32.png) [@bashonubuntu](https://discourse.julialang.org/u/bashonubuntu)\
**Post date:** [October 23, 2019, 2:23am UTC](https://discourse.julialang.org/t/indexedtables-and-type-stability-of-indexedtables-groupby/30186/7 "2019-10-23T02:23:52Z")

</div>

Yes, that makes sense. I am happy with the speeds especially since the IndexedTables.groupby seems to be the go-to method for doing many groupby operations (which is my situation) following [Group-by performance benchmarks and recommendations](https://discourse.julialang.org/t/group-by-performance-benchmarks-and-recommendations/9313)

The above example is useful but probably not a good analogy for problems involving groupby in practice where the operations are often cumbersome and not as simple as just summing over a column. But, if you’re saying I don’t really need to worry too much about the return-type of IndexedTables.groupby, then it’s fine.

---

_[View the full topic](https://discourse.julialang.org/t/indexedtables-and-type-stability-of-indexedtables-groupby/30186)._