[SYSTEMDS-2897] CLA decompressing write#1201
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Baunsgaard wants to merge 5 commits intoapache:masterfrom
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[SYSTEMDS-2897] CLA decompressing write#1201Baunsgaard wants to merge 5 commits intoapache:masterfrom
Baunsgaard wants to merge 5 commits intoapache:masterfrom
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The compression took the worng size of the original matrix to base the compression ratio on. This is because it would transpose the input matrix and then see the size of this transpoed matrix. A sparse matrix with few rows is smaller in SparseBlockMCSR
- lib matrix DataGen test fix - to create a sparseBlock if null. - reduce nnzPropagation tests memory usage because sometime we have OOM fails of this test on GitHub - misc tests less debug output - cast to float in python tests - Compressed append Empty optimization
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This commit adds the functionality of writing a compressed matrix to disk by decompressing it.
Furthermore this commit adds a efficient way of calculating nnz in compressed matrix blocks overwriting the default.