[zeromq-dev] tcp vs zeromq

Trevor Bernard trevor.bernard at gmail.com
Fri Jul 12 21:00:42 CEST 2013


In your performance experiment ZeroMQ will always be slower than TCP. There
is a small overhead to using ZeroMQ but it's mitigated by other smart
things it does like smart batching to avoid redundant network stack
traversals. But if all you're doing is a synchronous PING/PONG, you lose
that speed benefit entirely and might as well just use TCP.

ZeroMQ's value-add over TCP is stuff like API simplicity, asynchronicity,
message queuing/routing, multi-cast, atomic multi-part messaging, etc. If
speed is your concern, I would suggest redefining your problem and try to
model it asynchronously.

One embodiment might be:

Use PUSH/PULL to distribute the work and PUB/SUB to aggregate the results.

Warmest regards,

Trev

On Fri, Jul 12, 2013 at 3:19 PM, Diego Duclos <diego.duclos at gmail.com>wrote:

> Seeing as zeroMQ is most likely running on top of tcp in this case, it
> seems natural that for small messages the processing time of this extra
> layer of code is adding a noticeable processing time.
> You can find a really detailed write-up on performance at
> http://www.zeromq.org/results:0mq-tests-v03
>
>
> On Fri, Jul 12, 2013 at 7:51 PM, ashwini ramamurthy <
> ashwini.ram21 at gmail.com> wrote:
>
>> Hi All,
>>
>> To compare the performance of zeromq and tcp  I did the following
>> experiment
>>
>>
>>
>> *Experimental setup for zeromq *
>>
>>    -  android client(Motorola razr) which runs jeromq.
>>    -  java server(PC running Linux) which runs java binding of zeromq
>>    -  Using the REQUEST-REPLY messaging pattern
>>    - Sending 100/1000 messages to the server and 100/1000 messages to
>>    client (synchronous)
>>    - The client sends a hello message and waits for a reply from the
>>    server to send another message(ping-pong)
>>    - The server waits for a message and replies with a hello for every
>>    message sent
>>    - Both the devices were connected through wifi
>>    - *On an avg:For 100 messages the time taken was 937 msec*
>>    - *On an avg:For 1000 messages the time taken was 8270 msec*
>>
>> *Experimental setup for TCP*
>>
>>    - android client (Motorola razr)
>>    - java server (PC running Linux)
>>    - Using a REQ-REP pattern(ping-pong)
>>    - Sending 100/1000 messages to the server and 100/1000 back to
>>    client(synchronous)
>>    - Same as above, client sends a hello message to server and waits to
>>    receive a world message before sending the next message.
>>    - Both the devices were connected through wifi
>>    - *On an avg:For 100 messages the time taken was 504 msec*
>>    - *On an avg:For 1000 messages the time taken was 5240 msec*
>>
>> Is this excepted? or am i missing something or doing something wrong?
>>
>>
>>
>> Thanks,
>>
>> Ashwini
>>
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>>
>
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