Baunsgaard commented on PR #2064:
URL: https://github.com/apache/systemds/pull/2064#issuecomment-2289864260
after:
```txt
MCSR to MCSR: --- faster especially with more threads.
Input Size: 10000 x 10000 , sparsity: 0.100041
same, 0.123+- 0.020 ms,
replace_div 2 Parallel: 16, 19.914+- 7.455 ms,
replace_div 4 Parallel: 16, 14.524+- 2.185 ms,
replace_div 5 Parallel: 16, 14.212+- 2.474 ms,
replace_div 8 Parallel: 16, 15.831+- 2.863 ms,
replace_div 10 Parallel: 16, 15.686+- 2.918 ms,
replace_div 16 Parallel: 16, 15.785+- 1.338 ms,
replace_div 20 Parallel: 16, 13.273+- 3.128 ms,
replace_div 25 Parallel: 16, 15.810+- 1.173 ms,
replace_div 40 Parallel: 16, 19.310+- 1.450 ms,
replace_div 50 Parallel: 16, 20.257+- 0.976 ms,
replace_div 80 Parallel: 16, 20.275+- 1.237 ms, // slowing
because the GHz reduce on my laptop.
```
```txt
from MCSR to CSR -- not parallelized --- no change
Input Size: 10000 x 10000 , sparsity: 0.100041
same, 0.001+- 0.000 ms,
replace_div 2 Parallel: 1, 42.385+- 14.940 ms,
replace_div 4 Parallel: 1, 21.943+- 0.597 ms,
replace_div 5 Parallel: 1, 22.301+- 0.589 ms,
replace_div 8 Parallel: 1, 22.262+- 0.616 ms,
replace_div 10 Parallel: 1, 22.215+- 0.471 ms,
replace_div 16 Parallel: 1, 21.738+- 0.254 ms,
replace_div 20 Parallel: 1, 25.983+- 2.419 ms,
replace_div 25 Parallel: 1, 25.399+- 1.891 ms,
replace_div 40 Parallel: 1, 25.229+- 1.450 ms,
replace_div 50 Parallel: 1, 27.832+- 2.815 ms,
```
```txt
CSR to CSR
Input Size: 10000 x 10000 , sparsity: 0.100041
same, 0.001+- 0.000 ms,
replace_div 2 Parallel: 1, 18.675+- 2.125 ms,
replace_div 4 Parallel: 1, 18.011+- 1.650 ms, //not warmed up
replace_div 5 Parallel: 1, 8.341+- 0.397 ms,
replace_div 8 Parallel: 1, 8.596+- 0.318 ms, // actual
replace_div 10 Parallel: 1, 8.031+- 0.107 ms,
replace_div 16 Parallel: 1, 8.068+- 0.105 ms,
replace_div 20 Parallel: 1, 8.094+- 0.112 ms,
replace_div 25 Parallel: 1, 7.991+- 0.113 ms,
replace_div 40 Parallel: 1, 8.095+- 0.237 ms,
replace_div 50 Parallel: 1, 8.370+- 0.229 ms,
```
Before:
```txt
MCSR to CSR
Input Size: 10000 x 10000 , sparsity: 0.100041
same, 0.001+- 0.000 ms,
replace_div 2 Parallel: 1, 26.289+- 2.820 ms,
replace_div 4 Parallel: 1, 24.581+- 1.699 ms,
replace_div 5 Parallel: 1, 24.536+- 1.951 ms,
replace_div 8 Parallel: 1, 26.499+- 2.565 ms,
replace_div 10 Parallel: 1, 31.506+- 5.144 ms,
replace_div 16 Parallel: 1, 26.546+- 3.405 ms,
replace_div 20 Parallel: 1, 28.454+- 4.591 ms,
replace_div 25 Parallel: 1, 25.383+- 1.888 ms,
replace_div 40 Parallel: 1, 25.796+- 2.262 ms,
replace_div 50 Parallel: 1, 25.450+- 2.557 ms,
MCSR to MCSR parallel
Input Size: 10000 x 10000 , sparsity: 0.100041
same, 0.060+- 0.012 ms,
replace_div 2 Parallel: 16, 30.955+- 11.512 ms,
replace_div 4 Parallel: 16, 24.607+- 1.407 ms,
replace_div 5 Parallel: 16, 26.062+- 1.623 ms,
replace_div 8 Parallel: 16, 24.866+- 1.149 ms,
replace_div 10 Parallel: 16, 24.846+- 2.307 ms,
replace_div 16 Parallel: 16, 27.716+- 2.727 ms,
replace_div 20 Parallel: 16, 25.680+- 2.053 ms,
replace_div 25 Parallel: 16, 26.855+- 1.671 ms,
replace_div 40 Parallel: 16, 25.532+- 1.742 ms,
replace_div 50 Parallel: 16, 24.511+- 1.492 ms,
CSR to CSR
Input Size: 10000 x 10000 , sparsity: 0.100041
same, 0.001+- 0.000 ms,
replace_div 2 Parallel: 1, 8.910+- 0.660 ms,
replace_div 4 Parallel: 1, 8.683+- 0.391 ms,
replace_div 5 Parallel: 1, 8.260+- 0.354 ms,
replace_div 8 Parallel: 1, 8.217+- 0.443 ms,
replace_div 10 Parallel: 1, 8.652+- 0.455 ms,
replace_div 16 Parallel: 1, 8.246+- 0.366 ms,
replace_div 20 Parallel: 1, 8.888+- 1.142 ms,
replace_div 25 Parallel: 1, 8.067+- 0.348 ms,
replace_div 40 Parallel: 1, 8.175+- 0.344 ms,
replace_div 50 Parallel: 1, 8.173+- 0.355 ms,
```
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