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Uniform Loss vs. Specialized Optimization: A Comparative Analysis in Multi-Task Learning

Created by
  • Haebom

Author

Gabriel S. Gama, Valdir Grassi Jr.

Outline

This paper evaluates the performance of specialized multi-task optimizers (SMTOs) and reexamines their utility through comparative analysis with the uniform loss function. Addressing criticisms raised in previous studies that SMTOs overestimate their performance due to a lack of proper hyperparameter optimization and regularization, we conduct extensive experimental evaluations using more complex multi-task problems. Our results demonstrate that while SMTOs outperform the uniform loss function in some cases, the uniform loss function can also achieve comparable performance to SMTOs. Specifically, we analyze why the uniform loss function achieves comparable performance to SMTOs in some cases. The source code is publicly available.

Takeaways, Limitations

Takeaways:
We experimentally verify that SMTOs outperform equally weighted loss functions in some cases.
We show that an equally weighted loss function can achieve competitive performance with SMTOs with appropriate hyperparameter tuning and regularization.
Provides insight into the performance differences between SMTOs and the same weighted loss function.
Limitations:
Results may vary depending on the type and complexity of the multi-task problem used in this study.
Further research is needed on more diverse multi-task problems and a wider hyperparameter space.
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