Hi Patrick,

You are right that when the size of the accessibility table is too large,
it's useless for accessibility anyway.  We should have some way to
dynamically populate the table only when it is actually being used.

Currently, the only alternative to improve performance with large data sets
is to limit the data that you are visualizing in the first place, but
you'll have to create a way of sampling or summarizing the data on your
own.  Sorry that I can't offer any better suggestions at this time.



On Fri, May 31, 2019 at 11:58 AM Patrick Hardy <patrickwha...@gmail.com>
wrote:

> I am using corechart to build a visual representation of elevation data on
> large geographic data sets. I am wondering if there is a way to disable or
> customize the contents of the accessibility table, i.e. the table inside of
> the div with aria-label="A tabular representation of the data in the
> chart." I am experiencing a big performance hit, as this table contains
> over 10,000 DOM nodes on some of our pages, which is slowing down our load
> times significantly. Furthermore, it seems this much data would be unusable
> with a screen reader, so I'm wondering if a less verbose output is an
> option.
>
> Thanks for the help!
> Patrick
>
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-- 
Daniel LaLiberte <https://plus.google.com/100631381223468223275?prsrc=2>
dlalibe...@google.com <dlalibe...@google.com>   Cambridge MA

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