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ProFed: A Benchmark for Proximity-Based Non-IID Federated Learning Cover

ProFed: A Benchmark for Proximity-Based Non-IID Federated Learning

Open Access
|Mar 2026

Figures & Tables

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Figure 1

Spatial data distribution: homogeneous within subregions, non-IID across subregions.

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Figure 2

Data distribution patterns across five subregions: (a) IID data, (b) Dirichlet (non-IID), and (c) Hard (Highly non-IID). Each color represents a different subregion.

Table 1

Summary of the characteristics of the datasets included in the benchmark. The first five datasets are designed for classification tasks, with target values corresponding to discrete classes. In contrast, the last dataset is used for a regression task, where the target values span a continuous range.

DATASETTRAINING SIZETEST SIZEFEATURESTARGETS
MNIST60,00010,00078410
Fashion MNIST60,00010,00078410
EMNIST124,80020,80078427
CIFAR-1050,00010,0003,07210
CIFAR-10050,00010,0003,072100
UTKFace20,1503,557120,000[1;116]
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Listing 1

An example of how ProFed is used to partition the EMNIST dataset among devices.

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Figure 3

Validation accuracy results across MNIST, FashionMNIST, and EMNIST datasets using Dirichlet and hard partitioning methods.

Table 2

Results on the test set for different algorithms with different partitioning methods.

AlgorithmIIDDirichletHard
FedAvg0.95 ± 0.0010.9 ± 0.040.81 ± 0.01
FedProx0.886 ± 0.040.86 ± 0.01
Scaffold0.889 ± 0.060.81 ± 0.01
DOI: https://doi.org/10.5334/jors.624 | Journal eISSN: 2049-9647
Language: English
Submitted on: Sep 8, 2025
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Accepted on: Feb 11, 2026
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Published on: Mar 2, 2026
Published by: Ubiquity Press
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2026 Davide Domini, Christian Otte Ingemann, Gianluca Aguzzi, Lukas Esterle, Mirko Viroli, published by Ubiquity Press
This work is licensed under the Creative Commons Attribution 4.0 License.