Optimize AVX intrinsics for .NET8 #597
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bitfaster
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Jun 18, 2024
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Tabular data| Method | Runtime | Size | Mean | Error | StdDev | Ratio | Code Size | Allocated | |--------------------- |--------- |---------- |----------:|---------:|---------:|------:|----------:|----------:| | IncFlat | .NET 6.0 | 512 | 23.32 ns | 0.057 ns | 0.051 ns | 1.00 | 852 B | - | | IncBlock | .NET 6.0 | 512 | 17.89 ns | 0.052 ns | 0.048 ns | 0.77 | 813 B | - | | IncBlockAvxNotPinned | .NET 6.0 | 512 | 15.91 ns | 0.040 ns | 0.033 ns | 0.68 | NA | - | | IncBlockAvxPinned | .NET 6.0 | 512 | 15.37 ns | 0.036 ns | 0.032 ns | 0.66 | 856 B | - | | | | | | | | | | | | IncFlat | .NET 8.0 | 512 | 10.31 ns | 0.011 ns | 0.009 ns | 1.00 | 1,019 B | - | | IncBlock | .NET 8.0 | 512 | 14.51 ns | 0.016 ns | 0.015 ns | 1.41 | 863 B | - | | IncBlockAvxNotPinned | .NET 8.0 | 512 | 14.22 ns | 0.010 ns | 0.009 ns | 1.38 | NA | - | | IncBlockAvxPinned | .NET 8.0 | 512 | 12.52 ns | 0.011 ns | 0.010 ns | 1.21 | 859 B | - | | | | | | | | | | | | IncFlat | .NET 9.0 | 512 | 10.07 ns | 0.012 ns | 0.010 ns | 1.00 | 1,003 B | - | | IncBlock | .NET 9.0 | 512 | 15.67 ns | 0.074 ns | 0.066 ns | 1.56 | 852 B | - | | IncBlockAvxNotPinned | .NET 9.0 | 512 | 13.64 ns | 0.006 ns | 0.006 ns | 1.35 | NA | - | | IncBlockAvxPinned | .NET 9.0 | 512 | 12.50 ns | 0.010 ns | 0.009 ns | 1.24 | 844 B | - | | | | | | | | | | | | IncFlat | .NET 6.0 | 1024 | 21.20 ns | 0.052 ns | 0.048 ns | 1.00 | 852 B | - | | IncBlock | .NET 6.0 | 1024 | 17.88 ns | 0.065 ns | 0.061 ns | 0.84 | 813 B | - | | IncBlockAvxNotPinned | .NET 6.0 | 1024 | 15.88 ns | 0.037 ns | 0.035 ns | 0.75 | NA | - | | IncBlockAvxPinned | .NET 6.0 | 1024 | 15.38 ns | 0.031 ns | 0.029 ns | 0.73 | 856 B | - | | | | | | | | | | | | IncFlat | .NET 8.0 | 1024 | 10.04 ns | 0.010 ns | 0.009 ns | 1.00 | 1,019 B | - | | IncBlock | .NET 8.0 | 1024 | 14.22 ns | 0.029 ns | 0.027 ns | 1.42 | 863 B | - | | IncBlockAvxNotPinned | .NET 8.0 | 1024 | 14.38 ns | 0.008 ns | 0.007 ns | 1.43 | NA | - | | IncBlockAvxPinned | .NET 8.0 | 1024 | 12.41 ns | 0.011 ns | 0.011 ns | 1.24 | 863 B | - | | | | | | | | | | | | IncFlat | .NET 9.0 | 1024 | 10.36 ns | 0.050 ns | 0.046 ns | 1.00 | 1,003 B | - | | IncBlock | .NET 9.0 | 1024 | 15.41 ns | 0.125 ns | 0.111 ns | 1.49 | 852 B | - | | IncBlockAvxNotPinned | .NET 9.0 | 1024 | 13.69 ns | 0.012 ns | 0.011 ns | 1.32 | NA | - | | IncBlockAvxPinned | .NET 9.0 | 1024 | 12.40 ns | 0.010 ns | 0.009 ns | 1.20 | 844 B | - | | | | | | | | | | | | IncFlat | .NET 6.0 | 32768 | 21.18 ns | 0.047 ns | 0.044 ns | 1.00 | 852 B | - | | IncBlock | .NET 6.0 | 32768 | 18.01 ns | 0.039 ns | 0.036 ns | 0.85 | 813 B | - | | IncBlockAvxNotPinned | .NET 6.0 | 32768 | 15.95 ns | 0.051 ns | 0.048 ns | 0.75 | NA | - | | IncBlockAvxPinned | .NET 6.0 | 32768 | 15.28 ns | 0.030 ns | 0.027 ns | 0.72 | 856 B | - | | | | | | | | | | | | IncFlat | .NET 8.0 | 32768 | 11.31 ns | 0.011 ns | 0.010 ns | 1.00 | 1,019 B | - | | IncBlock | .NET 8.0 | 32768 | 15.74 ns | 0.023 ns | 0.019 ns | 1.39 | 863 B | - | | IncBlockAvxNotPinned | .NET 8.0 | 32768 | 14.08 ns | 0.014 ns | 0.011 ns | 1.24 | NA | - | | IncBlockAvxPinned | .NET 8.0 | 32768 | 12.54 ns | 0.011 ns | 0.010 ns | 1.11 | 863 B | - | | | | | | | | | | | | IncFlat | .NET 9.0 | 32768 | 10.99 ns | 0.013 ns | 0.012 ns | 1.00 | 1,003 B | - | | IncBlock | .NET 9.0 | 32768 | 17.17 ns | 0.025 ns | 0.023 ns | 1.56 | 852 B | - | | IncBlockAvxNotPinned | .NET 9.0 | 32768 | 13.74 ns | 0.023 ns | 0.021 ns | 1.25 | NA | - | | IncBlockAvxPinned | .NET 9.0 | 32768 | 12.57 ns | 0.017 ns | 0.016 ns | 1.14 | 844 B | - | | | | | | | | | | | | IncFlat | .NET 6.0 | 524288 | 27.79 ns | 0.467 ns | 0.390 ns | 1.00 | 852 B | - | | IncBlock | .NET 6.0 | 524288 | 26.43 ns | 0.186 ns | 0.145 ns | 0.95 | 813 B | - | | IncBlockAvxNotPinned | .NET 6.0 | 524288 | 24.87 ns | 0.115 ns | 0.090 ns | 0.90 | NA | - | | IncBlockAvxPinned | .NET 6.0 | 524288 | 23.26 ns | 0.135 ns | 0.120 ns | 0.84 | 856 B | - | | | | | | | | | | | | IncFlat | .NET 8.0 | 524288 | 18.46 ns | 0.189 ns | 0.177 ns | 1.00 | 1,017 B | - | | IncBlock | .NET 8.0 | 524288 | 23.63 ns | 0.114 ns | 0.107 ns | 1.28 | 863 B | - | | IncBlockAvxNotPinned | .NET 8.0 | 524288 | 40.75 ns | 0.423 ns | 0.395 ns | 2.21 | NA | - | | IncBlockAvxPinned | .NET 8.0 | 524288 | 20.95 ns | 0.092 ns | 0.086 ns | 1.13 | 863 B | - | | | | | | | | | | | | IncFlat | .NET 9.0 | 524288 | 18.29 ns | 0.284 ns | 0.266 ns | 1.00 | 1,004 B | - | | IncBlock | .NET 9.0 | 524288 | 23.77 ns | 0.148 ns | 0.139 ns | 1.30 | 855 B | - | | IncBlockAvxNotPinned | .NET 9.0 | 524288 | 22.06 ns | 0.136 ns | 0.127 ns | 1.21 | NA | - | | IncBlockAvxPinned | .NET 9.0 | 524288 | 21.16 ns | 0.107 ns | 0.100 ns | 1.16 | 844 B | - | | | | | | | | | | | | IncFlat | .NET 6.0 | 8388608 | 83.25 ns | 0.347 ns | 0.324 ns | 1.00 | 482 B | - | | IncBlock | .NET 6.0 | 8388608 | 66.31 ns | 0.238 ns | 0.211 ns | 0.80 | 443 B | - | | IncBlockAvxNotPinned | .NET 6.0 | 8388608 | 51.84 ns | 0.437 ns | 0.409 ns | 0.62 | NA | - | | IncBlockAvxPinned | .NET 6.0 | 8388608 | 49.40 ns | 0.377 ns | 0.353 ns | 0.59 | 486 B | - | | | | | | | | | | | | IncFlat | .NET 8.0 | 8388608 | 56.88 ns | 0.444 ns | 0.415 ns | 1.00 | 655 B | - | | IncBlock | .NET 8.0 | 8388608 | 59.86 ns | 0.252 ns | 0.210 ns | 1.05 | 499 B | - | | IncBlockAvxNotPinned | .NET 8.0 | 8388608 | 50.07 ns | 0.210 ns | 0.197 ns | 0.88 | NA | - | | IncBlockAvxPinned | .NET 8.0 | 8388608 | 42.44 ns | 0.178 ns | 0.149 ns | 0.75 | 499 B | - | | | | | | | | | | | | IncFlat | .NET 9.0 | 8388608 | 57.79 ns | 0.586 ns | 0.548 ns | 1.00 | 655 B | - | | IncBlock | .NET 9.0 | 8388608 | 59.96 ns | 0.387 ns | 0.362 ns | 1.04 | 504 B | - | | IncBlockAvxNotPinned | .NET 9.0 | 8388608 | 49.38 ns | 0.290 ns | 0.257 ns | 0.85 | NA | - | | IncBlockAvxPinned | .NET 9.0 | 8388608 | 42.13 ns | 0.323 ns | 0.302 ns | 0.73 | 496 B | - | | | | | | | | | | | | IncFlat | .NET 6.0 | 134217728 | 111.60 ns | 0.761 ns | 0.712 ns | 1.00 | 482 B | - | | IncBlock | .NET 6.0 | 134217728 | 86.40 ns | 1.305 ns | 1.220 ns | 0.77 | 443 B | - | | IncBlockAvxNotPinned | .NET 6.0 | 134217728 | 63.80 ns | 0.369 ns | 0.346 ns | 0.57 | NA | - | | IncBlockAvxPinned | .NET 6.0 | 134217728 | 61.29 ns | 0.568 ns | 0.531 ns | 0.55 | 486 B | - | | | | | | | | | | | | IncFlat | .NET 8.0 | 134217728 | 84.00 ns | 0.551 ns | 0.516 ns | 1.00 | 655 B | - | | IncBlock | .NET 8.0 | 134217728 | 78.41 ns | 0.522 ns | 0.488 ns | 0.93 | 499 B | - | | IncBlockAvxNotPinned | .NET 8.0 | 134217728 | 62.13 ns | 0.821 ns | 0.728 ns | 0.74 | NA | - | | IncBlockAvxPinned | .NET 8.0 | 134217728 | 51.84 ns | 0.313 ns | 0.278 ns | 0.62 | 499 B | - | | | | | | | | | | | | IncFlat | .NET 9.0 | 134217728 | 84.03 ns | 1.088 ns | 1.017 ns | 1.00 | 655 B | - | | IncBlock | .NET 9.0 | 134217728 | 78.25 ns | 0.985 ns | 0.921 ns | 0.93 | 504 B | - | | IncBlockAvxNotPinned | .NET 9.0 | 134217728 | 61.43 ns | 0.626 ns | 0.586 ns | 0.73 | NA | - | | IncBlockAvxPinned | .NET 9.0 | 134217728 | 51.50 ns | 0.265 ns | 0.248 ns | 0.61 | 496 B | - | |
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Tabular data
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Tabular data| Method | Runtime | Size | Mean | Error | StdDev | Ratio | Code Size | Allocated | |--------------------------- |--------- |---------- |----------:|---------:|---------:|------:|----------:|----------:| | FrequencyFlat | .NET 6.0 | 512 | 25.43 ns | 0.100 ns | 0.089 ns | 1.00 | 314 B | - | | FrequencyBlock | .NET 6.0 | 512 | 21.17 ns | 0.063 ns | 0.059 ns | 0.83 | 342 B | - | | FrequencyBlockAvxNotPinned | .NET 6.0 | 512 | 27.04 ns | 0.024 ns | 0.023 ns | 1.06 | 620 B | - | | FrequencyBlockAvxPinned | .NET 6.0 | 512 | 25.57 ns | 0.012 ns | 0.011 ns | 1.01 | 521 B | - | | | | | | | | | | | | FrequencyFlat | .NET 8.0 | 512 | 14.95 ns | 0.015 ns | 0.014 ns | 1.00 | 482 B | - | | FrequencyBlock | .NET 8.0 | 512 | 17.10 ns | 0.014 ns | 0.012 ns | 1.14 | 460 B | - | | FrequencyBlockAvxNotPinned | .NET 8.0 | 512 | 24.96 ns | 0.012 ns | 0.012 ns | 1.67 | 721 B | - | | FrequencyBlockAvxPinned | .NET 8.0 | 512 | 23.30 ns | 0.020 ns | 0.019 ns | 1.56 | 614 B | - | | | | | | | | | | | | FrequencyFlat | .NET 9.0 | 512 | 14.45 ns | 0.012 ns | 0.011 ns | 1.00 | 472 B | - | | FrequencyBlock | .NET 9.0 | 512 | 17.43 ns | 0.015 ns | 0.014 ns | 1.21 | 463 B | - | | FrequencyBlockAvxNotPinned | .NET 9.0 | 512 | 24.68 ns | 0.009 ns | 0.008 ns | 1.71 | 718 B | - | | FrequencyBlockAvxPinned | .NET 9.0 | 512 | 23.29 ns | 0.016 ns | 0.015 ns | 1.61 | 611 B | - | | | | | | | | | | | | FrequencyFlat | .NET 6.0 | 1024 | 25.47 ns | 0.105 ns | 0.098 ns | 1.00 | 314 B | - | | FrequencyBlock | .NET 6.0 | 1024 | 21.15 ns | 0.018 ns | 0.017 ns | 0.83 | 342 B | - | | FrequencyBlockAvxNotPinned | .NET 6.0 | 1024 | 27.07 ns | 0.041 ns | 0.039 ns | 1.06 | 620 B | - | | FrequencyBlockAvxPinned | .NET 6.0 | 1024 | 25.57 ns | 0.020 ns | 0.019 ns | 1.00 | 521 B | - | | | | | | | | | | | | FrequencyFlat | .NET 8.0 | 1024 | 14.94 ns | 0.012 ns | 0.011 ns | 1.00 | 482 B | - | | FrequencyBlock | .NET 8.0 | 1024 | 17.05 ns | 0.012 ns | 0.010 ns | 1.14 | 460 B | - | | FrequencyBlockAvxNotPinned | .NET 8.0 | 1024 | 24.83 ns | 0.015 ns | 0.014 ns | 1.66 | 753 B | - | | FrequencyBlockAvxPinned | .NET 8.0 | 1024 | 23.29 ns | 0.011 ns | 0.010 ns | 1.56 | 614 B | - | | | | | | | | | | | | FrequencyFlat | .NET 9.0 | 1024 | 14.45 ns | 0.007 ns | 0.007 ns | 1.00 | 472 B | - | | FrequencyBlock | .NET 9.0 | 1024 | 17.46 ns | 0.008 ns | 0.007 ns | 1.21 | 463 B | - | | FrequencyBlockAvxNotPinned | .NET 9.0 | 1024 | 24.69 ns | 0.014 ns | 0.012 ns | 1.71 | 718 B | - | | FrequencyBlockAvxPinned | .NET 9.0 | 1024 | 23.30 ns | 0.002 ns | 0.001 ns | 1.61 | 611 B | - | | | | | | | | | | | | FrequencyFlat | .NET 6.0 | 32768 | 26.17 ns | 0.286 ns | 0.253 ns | 1.00 | 314 B | - | | FrequencyBlock | .NET 6.0 | 32768 | 22.31 ns | 0.013 ns | 0.011 ns | 0.85 | 342 B | - | | FrequencyBlockAvxNotPinned | .NET 6.0 | 32768 | 27.10 ns | 0.005 ns | 0.004 ns | 1.04 | 620 B | - | | FrequencyBlockAvxPinned | .NET 6.0 | 32768 | 25.60 ns | 0.017 ns | 0.015 ns | 0.98 | 521 B | - | | | | | | | | | | | | FrequencyFlat | .NET 8.0 | 32768 | 15.83 ns | 0.008 ns | 0.006 ns | 1.00 | 482 B | - | | FrequencyBlock | .NET 8.0 | 32768 | 17.96 ns | 0.010 ns | 0.009 ns | 1.13 | 460 B | - | | FrequencyBlockAvxNotPinned | .NET 8.0 | 32768 | 24.84 ns | 0.021 ns | 0.019 ns | 1.57 | 753 B | - | | FrequencyBlockAvxPinned | .NET 8.0 | 32768 | 23.28 ns | 0.005 ns | 0.004 ns | 1.47 | 614 B | - | | | | | | | | | | | | FrequencyFlat | .NET 9.0 | 32768 | 15.66 ns | 0.012 ns | 0.011 ns | 1.00 | 472 B | - | | FrequencyBlock | .NET 9.0 | 32768 | 18.34 ns | 0.022 ns | 0.019 ns | 1.17 | 463 B | - | | FrequencyBlockAvxNotPinned | .NET 9.0 | 32768 | 24.77 ns | 0.025 ns | 0.022 ns | 1.58 | 718 B | - | | FrequencyBlockAvxPinned | .NET 9.0 | 32768 | 23.38 ns | 0.015 ns | 0.013 ns | 1.49 | 611 B | - | | | | | | | | | | | | FrequencyFlat | .NET 6.0 | 524288 | 42.61 ns | 0.183 ns | 0.162 ns | 1.00 | 314 B | - | | FrequencyBlock | .NET 6.0 | 524288 | 31.42 ns | 0.493 ns | 0.461 ns | 0.74 | 342 B | - | | FrequencyBlockAvxNotPinned | .NET 6.0 | 524288 | 31.10 ns | 0.480 ns | 0.449 ns | 0.73 | 620 B | - | | FrequencyBlockAvxPinned | .NET 6.0 | 524288 | 25.79 ns | 0.032 ns | 0.027 ns | 0.61 | 521 B | - | | | | | | | | | | | | FrequencyFlat | .NET 8.0 | 524288 | 25.08 ns | 0.244 ns | 0.228 ns | 1.00 | 482 B | - | | FrequencyBlock | .NET 8.0 | 524288 | 24.91 ns | 0.094 ns | 0.083 ns | 0.99 | 460 B | - | | FrequencyBlockAvxNotPinned | .NET 8.0 | 524288 | 27.71 ns | 0.546 ns | 0.536 ns | 1.10 | 753 B | - | | FrequencyBlockAvxPinned | .NET 8.0 | 524288 | 23.41 ns | 0.018 ns | 0.015 ns | 0.93 | 614 B | - | | | | | | | | | | | | FrequencyFlat | .NET 9.0 | 524288 | 24.64 ns | 0.478 ns | 0.424 ns | 1.00 | 472 B | - | | FrequencyBlock | .NET 9.0 | 524288 | 24.60 ns | 0.188 ns | 0.167 ns | 1.00 | 463 B | - | | FrequencyBlockAvxNotPinned | .NET 9.0 | 524288 | 25.83 ns | 0.144 ns | 0.128 ns | 1.05 | 681 B | - | | FrequencyBlockAvxPinned | .NET 9.0 | 524288 | 23.44 ns | 0.011 ns | 0.010 ns | 0.95 | 611 B | - | | | | | | | | | | | | FrequencyFlat | .NET 6.0 | 8388608 | 142.28 ns | 0.667 ns | 0.624 ns | 1.00 | 314 B | - | | FrequencyBlock | .NET 6.0 | 8388608 | 102.97 ns | 0.343 ns | 0.321 ns | 0.72 | 342 B | - | | FrequencyBlockAvxNotPinned | .NET 6.0 | 8388608 | 85.47 ns | 0.596 ns | 0.557 ns | 0.60 | 620 B | - | | FrequencyBlockAvxPinned | .NET 6.0 | 8388608 | 57.11 ns | 0.198 ns | 0.175 ns | 0.40 | 521 B | - | | | | | | | | | | | | FrequencyFlat | .NET 8.0 | 8388608 | 84.30 ns | 0.549 ns | 0.513 ns | 1.00 | 477 B | - | | FrequencyBlock | .NET 8.0 | 8388608 | 69.33 ns | 0.131 ns | 0.116 ns | 0.82 | 460 B | - | | FrequencyBlockAvxNotPinned | .NET 8.0 | 8388608 | 72.32 ns | 0.129 ns | 0.101 ns | 0.86 | 753 B | - | | FrequencyBlockAvxPinned | .NET 8.0 | 8388608 | 50.19 ns | 0.171 ns | 0.160 ns | 0.60 | 614 B | - | | | | | | | | | | | | FrequencyFlat | .NET 9.0 | 8388608 | 83.38 ns | 0.610 ns | 0.541 ns | 1.00 | 472 B | - | | FrequencyBlock | .NET 9.0 | 8388608 | 68.75 ns | 0.159 ns | 0.141 ns | 0.82 | 463 B | - | | FrequencyBlockAvxNotPinned | .NET 9.0 | 8388608 | 69.98 ns | 0.238 ns | 0.223 ns | 0.84 | 718 B | - | | FrequencyBlockAvxPinned | .NET 9.0 | 8388608 | 50.57 ns | 0.380 ns | 0.356 ns | 0.61 | 611 B | - | | | | | | | | | | | | FrequencyFlat | .NET 6.0 | 134217728 | 186.33 ns | 0.907 ns | 0.804 ns | 1.00 | 314 B | - | | FrequencyBlock | .NET 6.0 | 134217728 | 146.52 ns | 2.765 ns | 2.586 ns | 0.79 | 342 B | - | | FrequencyBlockAvxNotPinned | .NET 6.0 | 134217728 | 103.13 ns | 1.148 ns | 1.074 ns | 0.55 | 620 B | - | | FrequencyBlockAvxPinned | .NET 6.0 | 134217728 | 70.37 ns | 0.525 ns | 0.491 ns | 0.38 | 521 B | - | | | | | | | | | | | | FrequencyFlat | .NET 8.0 | 134217728 | 115.60 ns | 0.415 ns | 0.388 ns | 1.00 | 477 B | - | | FrequencyBlock | .NET 8.0 | 134217728 | 87.00 ns | 0.971 ns | 0.908 ns | 0.75 | 460 B | - | | FrequencyBlockAvxNotPinned | .NET 8.0 | 134217728 | 86.52 ns | 1.106 ns | 1.034 ns | 0.75 | 753 B | - | | FrequencyBlockAvxPinned | .NET 8.0 | 134217728 | 62.39 ns | 0.426 ns | 0.399 ns | 0.54 | 614 B | - | | | | | | | | | | | | FrequencyFlat | .NET 9.0 | 134217728 | 114.19 ns | 0.759 ns | 0.673 ns | 1.00 | 472 B | - | | FrequencyBlock | .NET 9.0 | 134217728 | 86.99 ns | 0.496 ns | 0.439 ns | 0.76 | 463 B | - | | FrequencyBlockAvxNotPinned | .NET 9.0 | 134217728 | 83.31 ns | 1.528 ns | 1.429 ns | 0.73 | 718 B | - | | FrequencyBlockAvxPinned | .NET 9.0 | 134217728 | 62.77 ns | 0.410 ns | 0.363 ns | 0.55 | 611 B | - | |
…tFaster.Caching into users/alexpeck/avx2
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…tFaster.Caching into users/alexpeck/avx2
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We saw good gains from AVX on .NET6, but not on .NET8/9. Not clear whether this is dynamic PGO, but inlining seems to help produce faster code.
2 changes here:
MethodImpl(MethodImplOptions.AggressiveInlining)In benchmarks, this is always faster on AMD, and only faster at large sketch sizes on Intel (smaller sizes regress by 20 to 30%, but when size is small this is likely noise).
Evict throughput test with size = 500 shows improvement on both CPUs (average of all runs):