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Code to loop through pvt slicer very slow

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    Code to loop through pvt slicer very slow

    Hi

    I have a pivot table and a linked slicer which has dates as items. To cover a calendar year, the number of items is 365.

    I also have a userform where FromDate and ToDate variables can be selected (via MSCalendar). On choosing the two dates, the following code enables the selected date items on the slicer.

    However, the code seems to take ages to go through each slicer element via code.

    Can someone figure out why it would be so slow?

    Thanks

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    Forum Moderator Richard Buttrey's Avatar
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    Re: Code to loop through pvt slicer very slow

    Hi,

    Any chance you could upload the workbook so that we can see the problem in context?
    Richard Buttrey

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    Re: Code to loop through pvt slicer very slow

    Sorry about the delay, Richard and thanks for your reply.

    I had to significantly reduce the base data to save this within the 1mb limit

    I attach the 'Module'.

    Cheers
    Attached Files Attached Files

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    Re: Code to loop through pvt slicer very slow

    Any thoughts?

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    Forum Moderator Richard Buttrey's Avatar
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    Re: Code to loop through pvt slicer very slow

    Hi,

    I did some tests on the AllSLicer procedure which seems to be the first one to run and which as you say is slow.
    The timings for 50 iterations through the slicer select loop takes about 6 seconds on my laptop, and 100 iterations 12 seconds. However when I increased the iterations to 150, it started to slow down after about 110 iterations and took 24 seconds, with 200 iterations taking 41 seconds.

    These timings were all starting with the slicers deselected. What is interesting is that if after a first iteration you leave the items selected and run the iteration again it slows down even more. 100 iterations taking 37 seconds.

    It seems that there is something inherent in the underlying machine code that handles slicers that are already selected that is just slow. Perhaps we shouldn't be surprised and it seems to be an extreme case of the general rule when programming VBA that Selecting stuff should be avoided.

    What's the ultimate goal here. I seem to remember that preslicer days various people had created procedures to identify which values in an autofilter list had been picked and maybe that e would offer you a more practical way forward.

    If I think of anything else I'll post back. I suspect there has not yet been much general analysis of slicers and we're still learning a lot about them. The fact that they seem to be rarely used (IMO) doesn't help either.

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    Re: Code to loop through pvt slicer very slow

    Thanks for coming back, Richard. Hopefully you will think of a work around to this problem.

    Cheers

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