Thanks for testing !

Yes, if you explicitly specify the :perlio (or on MacOS maybe better :stdio) layer the stream will be buffered. What I don't understand (yet ?) is why a simple :raw removes all layers, including the existing :perlio (or in your case :stdio) layer.

But I have the feeling, that that behaviour may be intentional and that only the documentation is a bit misleading here.

In reply to Re^2: Using ":raw" layer in open() vs. calling binmode() by Anonymous Monk
in thread Using ":raw" layer in open() vs. calling binmode() by Anonymous Monk

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