# Aggregator speedup

**URL:** <https://discuss.hail.is/t/aggregator-speedup/54>\
**Category:** Updates\
**Created:** [October 13, 2016, 6:30pm UTC](https://discuss.hail.is/t/aggregator-speedup/54 "2016-10-13T18:30:56Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![tpoterba](https://yyz2.discourse-cdn.com/flex036/user_avatar/discuss.hail.is/tpoterba/32/61_2.png) [@tpoterba](https://discuss.hail.is/u/tpoterba)\
**Post date:** [October 13, 2016, 6:30pm UTC](https://discuss.hail.is/t/aggregator-speedup/54/1 "2016-10-13T18:30:56Z")

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If you’ve been reluctant to use hail expr aggregators recently, worry no more! Their performance has been improved by 30x-100x or more due to a suite of recent changes. `Aggregable[Array[Numeric]].sum()` experienced the largest boost.