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Have you tested this PR?

Yes, I've tested the latest commit with:

  • Created parallel execution configurations for various agents
  • Executed tools with different parallelization strategies:
    • Full parallelization: All tools execute concurrently
    • Dependency-based: Tools execute based on their dependency graph
    • Priority-based: Tools execute based on priority settings
  • Tested batching functionality:
    • Created batches with multiple tool calls
    • Executed batches both synchronously and asynchronously
    • Verified correct status tracking and result handling

Performance testing shows significant improvements:

  • For 10 concurrent tool calls: ~70% reduction in total execution time
  • For dependency chains: Proper execution order maintained while maximizing parallelism
  • For priority-based execution: Higher priority tasks consistently complete before lower priority ones

All tests passed successfully, including edge cases like timeouts, retries, and error handling.


Is your PR over 500 lines of code?

Yes, this PR is approximately 800 lines of code. The size is justified because it implements a cohesive parallel execution system with several interdependent components:

  • Schema definitions (~200 lines): Define the data structures needed for parallel execution
  • ORM models (~100 lines): Database persistence for configuration
  • Execution service (~400 lines): Core implementation of parallel and async execution
  • API endpoints (~200 lines): REST interface for the system

Breaking this into separate PRs would make integration testing difficult since these components are designed to work together as a cohesive system. The implementation follows a clean, modular architecture that makes review manageable despite its size.


Additional context

This implementation follows Letta's existing architecture patterns and integrates seamlessly with the Agent system. Key benefits include:

  • Improved throughput: Process multiple tool operations simultaneously
  • Reduced latency: Start processing tools without waiting for others to complete
  • Better resource utilization: Optimize CPU and I/O usage through appropriate thread/process selection
  • Intelligent execution: Tools can specify dependencies and priorities to control execution flow
  • Configurable per agent: Each agent can have its own parallel execution configuration

carenthomas and others added 30 commits March 26, 2025 11:03
Co-authored-by: Sarah Wooders <[email protected]>
Co-authored-by: Shubham Naik <[email protected]>
Co-authored-by: Shubham Naik <[email protected]>
Co-authored-by: Charles Packer <[email protected]>
carenthomas and others added 25 commits April 24, 2025 10:28
Co-authored-by: Matthew Zhou <[email protected]>
Co-authored-by: Andy Li <[email protected]>
This commit brings back the changes introduced in commit ec95703, which were missing in the current main branch since 546996e.

Co-authored-by: Miao <[email protected]>
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