# Understanding Async

**URL:** <https://discourse.pangeo.io/t/understanding-async/1098>\
**Category:** Uncategorized\
**Created:** [December 11, 2020, 1:25pm UTC](https://discourse.pangeo.io/t/understanding-async/1098 "2020-12-11T13:25:22Z")\
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**Author:** ![martindurant](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.pangeo.io/martindurant/32/388_2.png) [@martindurant](https://discourse.pangeo.io/u/martindurant)\
**Post date:** [December 11, 2020, 2:50pm UTC](https://discourse.pangeo.io/t/understanding-async/1098/4 "2020-12-11T14:50:55Z")

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Correct - which is exactly the origin or the recommendation for \>=100MB chunks in the first place. async lessens the overhead for smaller chunks (so long as they are loaded concurrently, meaning a dask partition containing many chunks), so you could now choose to chunk to smaller sizes than before, which can be very convenient in some cases, or merely accidental in others.

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