How to speed up the response to a large number of RIC codes?

bangbangg
bangbangg
in EMA

Hi. I'm sending a request with 1700 RIC codes in the form of a batch. It is necessary that the response for all codes does not exceed 0.5 seconds.

An example of my request.

OmmConsumer consumer = EmaFactory.createOmmConsumer(EmaFactory.createOmmConsumerConfig().host(host).username(user));
ElementList batch = EmaFactory.createElementList();
OmmArray ommArray = EmaFactory.createOmmArray();
if(!codesList.isEmpty()) {
    for (String code : codesList) {
        ommArray.add(EmaFactory.createOmmArrayEntry().ascii(code));
    }
    batch.add(EmaFactory.createElementEntry().array(EmaRdm.ENAME_BATCH_ITEM_LIST, ommArray));
}

ReutersConsumer reutersConsumer = new ReutersConsumer();//implements OmmConsumerClient
consumer.registerClient(EmaFactory.createReqMsg().domainType(EmaRdm.MMT_MARKET_PRICE).serviceName(feedName).payload(batch).interestAfterRefresh(false), reutersConsumer);

Now the response takes about 3 seconds.

How can I organize my code to achieve the fastest possible response?

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Best Answer

  • David Thomas
    David Thomas
    Answer ✓

    Hello @bangbangg

    The time it takes the initial responses to be delivered depends as much on factors
    outside the control of the application and the API e.g.
    If the items are already cached at the server, how many feeds are providing the service
    and how long it takes the service to fetch individual instruments. These factors are
    less predictable, particularly in a production environment.
    With stringent timing requirements the most effective way of ensuring a more
    predictable outcome would involve some form of pre-request/caching but I would also
    suggest examining the reasons for such a timing requirement.
    e.g. Snapshots might not be suitable for the use-case.

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