This is a question about a short part in Bach's Partita for Violin (BWV 1004) as played and interpreted by several different artists/instruments,
which can be heard at 19:56 on this Youtube upload.
In the nicely played violin on that version the sequence beginning with the C sharp (second measure in the image above) is played (I think) as written, without pause or lengthening of notes.
In Segovia's (guitar) version at about 3:54 the C sharp is held for more or less an additional beat. He's entitled to whatever license he took but the timing for the part that follows is not easily parsed for someone unfamiliar with the original. I have read complaints to this effect in comments but can't find them at the moment. It was a question-mark in my own thinking until I troubled to look up the original.
By contrast, here is Itzhaq Perlman, who plays it exactly as written at 4:19.
My question is whether, in light of potential and in my case actual confusion about the timing of the runs, the arguably slight alteration of timing is not too much?
There is no scientific answer to this question but I'd be interested in what experienced musicians have to say about it. Any edits to clarify the question welcome.