Add mmap value store for multi-thread fast retrieval of 2D sub-matrix #257
+900
−0
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Issue #, if available:
N/A
Description of changes:
Added Numerical (float32) C with Python binding mmap value store (2D matrix).
Accelerates sub-matrix retrieval given rows and cols indices, comparing to for-loop
np.array.item(i, j)
.For value store of 66M x 100, time cost of retrieving (Python binding) random sub-matrix 500x50, comparing to numpy for-loop is 0.09ms (4 threads) vs. 5ms
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