nirvanjhurreepriv opened a new pull request, #2524:
URL: https://github.com/apache/systemds/pull/2524
## Authors (for submission)
- Charansurya Udaysingh Jhurree, 488213
- Deniz Durmusoglu, 530387
- Yagiz Bartu Arslan, 529386
## Summary
Implements matrix compression techniques to reduce communication overhead in
SystemDS's federated learning backend.
## Changes
- New package: org.apache.sysds.runtime.compress
- TopK Sparsification (up to 66x compression)
- Probabilistic Quantization (4-16x compression, unbiased)
- CompressionConfig, CompressionFactory, MatrixCompressor interface
- Integration into FederationMap.broadcast() with safe fallback
- 19 unit tests, all passing
## Testing
mvn test -Dtest=TopKCompressorTest,ProbabilisticQuantizationCompressorTest
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