# Update Hail 0.2 + Time to read MT file

**URL:** <https://discuss.hail.is/t/update-hail-0-2-time-to-read-mt-file/561>\
**Category:** Help \[0.1\]\
**Created:** [July 10, 2018, 9:55pm UTC](https://discuss.hail.is/t/update-hail-0-2-time-to-read-mt-file/561 "2018-07-10T21:55:18Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![ines](https://yyz2.discourse-cdn.com/flex036/user_avatar/discuss.hail.is/ines/32/239_2.png) [@ines](https://discuss.hail.is/u/ines)\
**Post date:** [July 10, 2018, 9:55pm UTC](https://discuss.hail.is/t/update-hail-0-2-time-to-read-mt-file/561/1 "2018-07-10T21:55:18Z")

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Hi,

You recommend to update the new version of Hail 0.2 each week.

But I have noticed that the new version on [https://hail.is/docs/devel/getting\_started.html](https://hail.is/docs/devel/getting_started.html) is **eb1e0420579**  
but on google bucket (gs://hail-common/builds/devel), it suggests other versions.

For example, before when I was using **aa83f2a1d041** version : it takes two seconds to read a MT file.  
Now with **eb1e04205793** version, it is unstable : sometimes 1 seconds , sometimes 30 minutes.

Do you have an idea of what can be the problem ?

Thanks for your help !!

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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:** [July 10, 2018, 10:11pm UTC](https://discuss.hail.is/t/update-hail-0-2-time-to-read-mt-file/561/2 "2018-07-10T22:11:38Z")

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I have an idea, and will post a fix.

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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:** [July 10, 2018, 10:15pm UTC](https://discuss.hail.is/t/update-hail-0-2-time-to-read-mt-file/561/3 "2018-07-10T22:15:19Z")

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I believe this will fix:  
[https://github.com/hail-is/hail/pull/3915](https://github.com/hail-is/hail/pull/3915)

Note that a _bunch_ of things have gotten way faster in the last 2 months.

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<div class="post-metadata">

**Author:** ![ines](https://yyz2.discourse-cdn.com/flex036/user_avatar/discuss.hail.is/ines/32/239_2.png) [@ines](https://discuss.hail.is/u/ines)\
**Post date:** [July 11, 2018, 12:37pm UTC](https://discuss.hail.is/t/update-hail-0-2-time-to-read-mt-file/561/4 "2018-07-11T12:37:32Z")

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Ok many thanks !!

So I have to use **eb1e0420579** version again ?

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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:** [July 11, 2018, 12:41pm UTC](https://discuss.hail.is/t/update-hail-0-2-time-to-read-mt-file/561/5 "2018-07-11T12:41:07Z")

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No, you’ll have to update to the latest version when this fix gets merged (probably in the next few hours).

We never change deployed versions, just add new ones!