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What is a Local Activity?

A Local Activity is an Activity Execution that executes in the same process as the Workflow Execution that spawns it.

Although a Local Activity consumes less resources than a regular Activity Execution, it is subject to shorter durations and a lack of rate limiting.

Some Activities are very short lived and do not need the queuing semantic, flow control, rate limiting and routing capabilities. For this case, Temporal supports a local Activity feature. Local Activities are executed in the same worker process as the Workflow that invoked them. Consider using local Activities for functions that are:

  • no longer than a few seconds
  • do not require global rate limiting
  • do not require routing to specific workers or pools of workers
  • can be implemented in the same binary as the Workflow that invokes them

The main benefit of local Activities is that they are much more efficient in utilizing Temporal service resources and have much lower latency overhead compared to the usual Activity invocation.