Baunsgaard commented on PR #2043:
URL: https://github.com/apache/systemds/pull/2043#issuecomment-2209596740
The main benefit in this PR is when we perform replacement on a sparse
matrix, and the output is dense.
on a 10k x 10k 0.1 sparse matrix
After
```
java -jar target/systemds-3.3.0-SNAPSHOT-perf.jar 17 10000 10000 0.1 16
Profiling started
replaceZero, 132.883+- 9.335 ms,
replaceOne, 59.612+- 3.295 ms,
replaceNaN, 10.651+- 0.470 ms,
```
Before
```
java -jar target/systemds-3.3.0-SNAPSHOT-perf.jar 17 10000 10000 0.1 1
Profiling started
replaceZero, 228.727+- 11.965 ms,
replaceOne, 163.212+- 4.993 ms,
replaceNaN, 10.602+- 0.437 ms,
```
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