masahi commented on pull request #7611:
URL: https://github.com/apache/tvm/pull/7611#issuecomment-799954582
I confirmed that this sort also works with VK / SPIRV backend with the
following great results:
```
main_vulkan mergepath_vk mergepath_rocm
[1000, 1, 1] 3.04 ms 0.90 ms 0.12 ms
[1, 1000, 1] 3.04 ms 0.88 ms 0.12 ms
[1, 1, 1000] 3.04 ms 0.73 ms 0.11 ms
[1000, 10, 10] 3.49 ms 0.91 ms 0.24 ms
[10, 1000, 10] 3.49 ms 0.91 ms 0.23 ms
[10, 10, 1000] 3.25 ms 0.73 ms 0.22 ms
[1000, 100, 100] 124.09 ms 14.34 ms 19.13 ms
[100, 1000, 100] 186.12 ms 12.03 ms 17.07 ms
[100, 100, 1000] 119.85 ms 10.88 ms 15.87 ms
[10000, 1, 1] 31.27 ms 1.21 ms 0.24 ms
[1, 10000, 1] 31.23 ms 1.18 ms 0.24 ms
[1, 1, 10000] 31.20 ms 1.03 ms 0.23 ms
[10000, 10, 10] 40.54 ms 3.53 ms 2.72 ms
[10, 10000, 10] 41.29 ms 3.43 ms 2.60 ms
[10, 10, 10000] 38.88 ms 3.28 ms 2.52 ms
[10000, 100, 100] 3006.17 ms 270.40 ms 340.12 ms
[100, 10000, 100] 3327.44 ms 207.98 ms 286.45 ms
[100, 100, 10000] 1949.95 ms 179.33 ms 252.66 ms
[100000, 1, 1] 259.56 ms 1.37 ms 0.49 ms
[1, 100000, 1] 259.52 ms 1.30 ms 0.50 ms
[1, 1, 100000] 259.65 ms 1.14 ms 0.49 ms
[100000, 10, 10] 538.90 ms 33.35 ms 34.05 ms
[10, 100000, 10] 514.35 ms 31.01 ms 31.86 ms
[10, 10, 100000] 396.63 ms 29.90 ms 30.78 ms
[1000000, 1, 1] 2336.85 ms 5.68 ms 3.87 ms
[1, 1000000, 1] 2346.90 ms 5.69 ms 3.87 ms
[1, 1, 1000000] 2337.73 ms 5.51 ms 3.83 ms
[1000000, 10, 10] 6797.32 ms 411.09 ms 451.99 ms
[10, 1000000, 10] 6087.86 ms 347.81 ms 387.86 ms
[10, 10, 1000000] 4416.72 ms 333.54 ms 372.60 ms
[(4507,), 0] 15.22 ms 0.87 ms 0.20 ms
[(1, 122640), 1] 290.39 ms 1.18 ms 0.51 ms
[(1, 120000), 1] 285.99 ms 1.14 ms 0.51 ms
[(1, 30000), 1] 72.42 ms 0.98 ms 0.26 ms
[(1, 7500), 1] 18.76 ms 0.83 ms 0.19 ms
[(1, 1000), 1] 3.00 ms 0.68 ms 0.11 ms
```
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