Optimizing process execution for latency

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This topic only applies to BAW, and is located in the BAW repository. Last updated on 2025-03-13 12:15
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Select the optimization for latency to reduce thread context-switching for processes that require low latency responses. When enabled, this optimization causes the process instance to keep its execution thread rather than releasing it back to the pool of threads that are shared between activities. By default, new processes are not optimized for latency, which means that, between activities, instances return their execution threads to the shared thread pool. You can change the optimizing setting for a process in the designer.

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By default, new processes are not optimized for latency, which means that, between activities, instances return their execution threads to the shared thread pool. You can change the optimizing setting for a process in the designer.

This optimization setting defines two classes of processes:
  • The default processing behavior is not optimized for latency, which means that the thread is released after each unit of work. This behavior ensures that all process instances that use the default setting have an equal chance to continue navigation of the process.
  • System tasks and decision tasks that are optimized for latency are executed on the same thread that the process uses for navigation. If multiple system tasks or decision tasks exist in parallel paths of the process, only one path is executed by the same thread, the other paths are scheduled to use the default behavior by the Event Manager. Process instances with this execution optimization use the Event Manager threads for longer and so they provide a more predictable latency. If a system task calls an asynchronous implementation such as an asynchronous Advanced Integration service, the default processing behavior is used.

You must take care to avoid causing a negative performance impact on other instances, services, undercover agents, and other functions that use the shared pool of threads.

Procedure

To enable the optimization for latency, complete the following actions.In the process, click the Overview tab. Then go the Advanced section, and select Optimize Execution for Latency.

  1. Open the process.
  2. On the Overview tab, open the Advanced section.
  3. Select Optimize Execution for Latency to reduce thread context-switching for the process.
    Clearing the option turns off the optimization for the process.