On Nov 15, 2011, at 2:36 PM, MinRK wrote:
> e.g.
>
> struct sequence_id {
> uint64 number;
> uchar uuid[16];
> };
>
> Is this all right? Or is there a better way to accomplish this framing?
>
> cr
>
> I have a general question related to this - what is the relative cost in
> zeromq of these being separate very-small messages versus one packed message?
> Has someone done perf tests for this kind of thing?
I haven't tested it, but I assume that reading a multipart message versus a
single-part message is more time consuming due to 2 factors.
1. The I/O thread needs to make sure all parts are accounted for before atomic
delivery.
2. The #recv has to examine the message frame for the RCVMORE bit.
It's minor work, but as we all know, the fastest code is "no code."
On a related topic, I packed these two details together because they are
logically related. The unique sequence_id is a combination of sequence_number
and uuid.
cr
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