Passing a stream into EnvironBuilder.get_environ()

[AbdealiLoKo]

I was using werkzeug.test.EnvironBuilder.get_environ() and realized that when I gave a pretty large file, this function was taking a fair amount of RAM.
I was assuming that it would simply take the input_stream and pass it to the other side.

I then realized that when I give a input_stream and content_length the function was still reading the entire stream into RAM, and then re-calculating the content_length

Reference:
https://github.com/pallets/werkzeug/blob/3.0.1/src/werkzeug/test.py#L681-L686

        if input_stream is not None:
            start_pos = input_stream.tell()
            input_stream.seek(0, 2)
            end_pos = input_stream.tell()
            input_stream.seek(start_pos)
            content_length = end_pos - start_pos

Is there a more optimal way for me to simply provide the content_length and input_stream so that werkzeug takes my values instead of reading the entire stream into RAM ?