# Planning for SMTK v3.1 and v4.0

**URL:** <https://discourse.kitware.com/t/planning-for-smtk-v3-1-and-v4-0/216>\
**Category:** Design\
**Created:** [January 15, 2019, 7:21pm UTC](https://discourse.kitware.com/t/planning-for-smtk-v3-1-and-v4-0/216 "2019-01-15T19:21:52Z")\
**Posts on this page:** 1\
**Page:** 2

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**Author:** ![tj.corona](https://discourse.kitware.com/user_avatar/discourse.kitware.com/tj.corona/32/35_2.png) [@tj.corona](https://discourse.kitware.com/u/tj.corona)\
**Post date:** [February 28, 2019, 11:44pm UTC](https://discourse.kitware.com/t/planning-for-smtk-v3-1-and-v4-0/216/21 "2019-02-28T23:44:38Z")

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For the record, that’s 234 times the resource is being locked/unlocked, attributes are navigated, observers fired across Qt signals/slots, etc.

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