# Don't save start / end nodes for variable connection

**URL:** <https://forum.knime.com/t/dont-save-start-end-nodes-for-variable-connection/18910>\
**Category:** KNIME Analytics Platform\
**Created:** [October 18, 2019, 6:59am UTC](https://forum.knime.com/t/dont-save-start-end-nodes-for-variable-connection/18910 "2019-10-18T06:59:41Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![mwiegand](https://forum-cdn.knime.com/user_avatar/forum.knime.com/mwiegand/32/66896_2.png) [@mwiegand](https://forum.knime.com/u/mwiegand)\
**Post date:** [October 18, 2019, 6:59am UTC](https://forum.knime.com/t/dont-save-start-end-nodes-for-variable-connection/18910/1 "2019-10-18T06:59:41Z")

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HI,

I try to optimize the workflows and their resource consumption as often as possible. Using the don’t save start / end notes becomes very handy when I am only interested in the result.

However, using the don’t save start / end nodes in conjunction with nodes that do not have an incoming data port, like the file reader nodes, is only possible with workarounds.

I’d like to suggest to extend the don’t save start / end nodes with variable ports, though.

Kind regards  
Mike

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**Author:** ![Martyna](https://forum-cdn.knime.com/user_avatar/forum.knime.com/martyna/32/20942_2.png) [@Martyna](https://forum.knime.com/u/Martyna)\
**Post date:** [October 22, 2019, 6:55am UTC](https://forum.knime.com/t/dont-save-start-end-nodes-for-variable-connection/18910/2 "2019-10-22T06:55:24Z")

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Hi Mike,

interesting idea to use the don’t save start / end node 🙂  
With extending the nodes with variable ports, do you mean changing the input port to be optional?

Best,  
Martyna

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**Author:** ![mwiegand](https://forum-cdn.knime.com/user_avatar/forum.knime.com/mwiegand/32/66896_2.png) [@mwiegand](https://forum.knime.com/u/mwiegand)\
**Post date:** [October 22, 2019, 9:45am UTC](https://forum.knime.com/t/dont-save-start-end-nodes-for-variable-connection/18910/3 "2019-10-22T09:45:32Z")

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Hi @Martyna,

yes partially. I’d suggest to add a flow variable port and make that and the data port optional.

Kind regards  
Mike

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**Author:** ![Martyna](https://forum-cdn.knime.com/user_avatar/forum.knime.com/martyna/32/20942_2.png) [@Martyna](https://forum.knime.com/u/Martyna)\
**Post date:** [October 22, 2019, 9:59am UTC](https://forum.knime.com/t/dont-save-start-end-nodes-for-variable-connection/18910/4 "2019-10-22T09:59:19Z")

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Okay got it. I will forward this to our development, but of course without any promises.

Thanks again for sharing your thoughts!  
Best,  
Martyna

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**Author:** ![system](https://forum-cdn.knime.com/uploads/default/original/1X/ab3ccf34482a0329361734a18199390177204f15.png) [@system](https://forum.knime.com/u/system)\
**Post date:** [April 21, 2020, 9:59pm UTC](https://forum.knime.com/t/dont-save-start-end-nodes-for-variable-connection/18910/5 "2020-04-21T21:59:21Z")

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