[PD] CPU usage of block delay vs. delread~-delwrite~

Matt Barber brbrofsvl at gmail.com
Mon Oct 12 06:05:17 CEST 2015

Hi list.

If I want to delay a signal by 448 samples, I can either use a
delread~-delwrite~ pair in connected subpatches (in order to force correct
scheduling), or I can [inlet~] it into a subpatch with [block~ 512] and
[outlet~] it back out to the parent (whose block size is 64). I haven't
done the test yet, but I'm curious if anyone has -- which of these uses
less CPU in general? Is reblocking expensive?

I know that using blocking for delay is not a good general approach, but in
this case let's say I know that block delay would suit my needs exactly.
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