# Window (inside Designer) Extremely Slow

**URL:** <https://forum.inductiveautomation.com/t/window-inside-designer-extremely-slow/18878>\
**Category:** Ignition\
**Tags:** ignition79\
**Created:** [July 18, 2018, 2:55pm UTC](https://forum.inductiveautomation.com/t/window-inside-designer-extremely-slow/18878 "2018-07-18T14:55:14Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![c.bertulli](https://avatars.discourse-cdn.com/v4/letter/c/f19dbf/32.png) [@c.bertulli](https://forum.inductiveautomation.com/u/c.bertulli)\
**Post date:** [July 18, 2018, 2:55pm UTC](https://forum.inductiveautomation.com/t/window-inside-designer-extremely-slow/18878/1 "2018-07-18T14:55:14Z")

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Hi All,

I have a window with just a few elements inside of it, that runs extremely slow inside my designer. Just this one. It is composed as the following:  
A Power Table ( that is not maintaining its column size 😡 ) containing a Dataset 51R x 5C. Four columns ( 51R x 4C = 204 cells ) of this Dataset are bound to a “Cell Update” with 4 array Tag ( Memory Tags ).  
Another Power Table, which is set up like the previous one.  
A Chart with 8 Dataset ( One for each column of the two power tables ). Every Dataset ( 51R x 2C ) is bound with the same array tags as the tables ( for displaying the table’s data inside the chart, I can’t bind the table’s Dataset with the chart’s Dataset due to scale ).  
Other minor components ( 7 buttons, some labels )

Can anyone help me out?

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**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [July 18, 2018, 3:12pm UTC](https://forum.inductiveautomation.com/t/window-inside-designer-extremely-slow/18878/2 "2018-07-18T15:12:23Z")

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What scripts are you running? Slow client performance is almost always caused by scripts running too frequently or for too long on the main thread.

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<div class="post-metadata">

**Author:** ![c.bertulli](https://avatars.discourse-cdn.com/v4/letter/c/f19dbf/32.png) [@c.bertulli](https://forum.inductiveautomation.com/u/c.bertulli)\
**Post date:** [July 18, 2018, 3:28pm UTC](https://forum.inductiveautomation.com/t/window-inside-designer-extremely-slow/18878/3 "2018-07-18T15:28:47Z")

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I have a script running in the “Internal Frame Activated” which take some parameters and do a mathematical expression. Then take every result and write them inside two Array ( 50 elements each ). Nothing more.  
It was working like a charm until a week ago 😢