This is a perfect example of why comments that explain why something is going on, rather than just what is going on, are so useful!

I think in this case you could just put the write into a function/macro that documents it's intent.

There are many good reasons for making functions, and occasionally even a good reason to write a macro, but avoiding writing a comment is not one of them.

I disagree. Writing a comment to express something that can adequately be expressed by code adds overhead to reading it.

That looks to me like a made-up problem. I could be persuaded otherwise, though, so post some code that shows how it works for this particular case.

It already is - the function is called "send", and rather than wasting its time just doing one write, it does a whole pile of them at once ;)