[jerf]

Long before sync.Pool was a thing, I wrote a pool for []bytes: https://github.com/thejerf/gomempool I haven't taken it down because it isn't obsoleted by sync.Pool because the pool is aware of the size of the []bytes. Though it may be somewhat obsoleted by the fact the GC has gotten a lot better since I wrote it, somewhere in the 1.3 time frame. But it solve exactly that problem I had; relatively infrequent messages from the computer's point of view (e.g., a system that is probably getting messages every 50ms or so), but that had to be pulled into buffers completely to process, and had highly irregular sizes. The GC was doing a ton of work when I was allocating them all the time but it was easy to reuse buffers in my situation.