Can I enquire as to why you are posting this in multiple places?
You only just posted this:
https://github.com/apache/poi/discussions/847

On Wed, 16 Jul 2025 at 16:16, Marijus Gudiskis <gudis...@privasphere.com> wrote:
>
> Hello POI team,
>
>
>
> I Would like to use POI HMEF, but before that, I would need to know if it is 
> memory constant. As in, if I have a SharedInputStream(or any other 
> InputStream) will it be able to use it without converting it to a byte array. 
> As an example, if we have a SharedInputStream that is memory constant as it 
> reads from a file that is of size 10MB, will POI HMEF not read all of it to 
> memory for processing?
>
>
>
> Thanks!
>
>
>
> With kind regards
>
>
>
> Marijus Gudiskis
>
>
>
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