# Big Data with HierarchicalRegression

**URL:** <https://discourse.pymc.io/t/big-data-with-hierarchicalregression/1693>\
**Category:** Questions\
**Created:** [August 10, 2018, 12:44am UTC](https://discourse.pymc.io/t/big-data-with-hierarchicalregression/1693 "2018-08-10T00:44:30Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![junpenglao](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.pymc.io/junpenglao/32/8_2.png) [@junpenglao](https://discourse.pymc.io/u/junpenglao)\
**Post date:** [August 10, 2018, 4:36am UTC](https://discourse.pymc.io/t/big-data-with-hierarchicalregression/1693/2 "2018-08-10T04:36:31Z")

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The same question comes up recently: [ADVI Minibatch slows down with increasing size of data](https://discourse.pymc.io/t/advi-minibatch-slows-down-with-increasing-size-of-data/1487)

According to the profiling, what slows down the sampling is the part data is being indexed (for minibatch), I wonder if there is any way to optimized that… @ferrine?

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