AddictedCS commented on issue #933:
URL: https://github.com/apache/lucenenet/issues/933#issuecomment-2016737653
And here are the results for different sets of parameters. The params
options set as follows:
```csharp
[Params((FileOptions.Asynchronous | FileOptions.RandomAccess |
FileOptions.WriteThrough),
(FileOptions.Asynchronous | FileOptions.RandomAccess),
(FileOptions.Asynchronous | FileOptions.WriteThrough),
(FileOptions.RandomAccess | FileOptions.WriteThrough),
(FileOptions.Asynchronous),
(FileOptions.RandomAccess),
(FileOptions.WriteThrough))]
public FileOptions Options;
```
The degradation varies between **120x-180x**.
```
BenchmarkDotNet v0.13.12, macOS Sonoma 14.4 (23E214) [Darwin 23.4.0]
Apple M2 Max, 1 CPU, 12 logical and 12 physical cores
.NET SDK 8.0.203
[Host] : .NET 8.0.3 (8.0.324.11423), Arm64 RyuJIT AdvSIMD
.NET 7.0 : .NET 7.0.5 (7.0.523.17405), Arm64 RyuJIT AdvSIMD
.NET 8.0 : .NET 8.0.3 (8.0.324.11423), Arm64 RyuJIT AdvSIMD
Server=True
| Method | Job | Runtime | Options | Mean |
Error | StdDev | Median | Ratio | RatioSD |
|------------ |--------- |--------- |---------------------
|-------------:|-----------:|-------------:|-------------:|-------:|--------:|
| **Write1Kb** | **.NET 7.0** | **.NET 7.0** | **WriteThrough** |
**36.68 μs** | **0.291 μs** | **0.243 μs** | **36.75 μs** |
**1.00** | **0.00** |
| Write1Kb | .NET 8.0 | .NET 8.0 | WriteThrough | 4,973.23 μs |
86.943 μs | 81.327 μs | 4,998.96 μs | 135.48 | 2.83 |
| | | | | |
| | | | |
| Write2Kb | .NET 7.0 | .NET 7.0 | WriteThrough | 40.38 μs |
0.792 μs | 1.323 μs | 40.69 μs | 1.00 | 0.00 |
| Write2Kb | .NET 8.0 | .NET 8.0 | WriteThrough | 4,941.10 μs |
98.673 μs | 228.689 μs | 4,975.19 μs | 123.60 | 6.87 |
| | | | | |
| | | | |
| Write4Kb | .NET 7.0 | .NET 7.0 | WriteThrough | 41.22 μs |
0.524 μs | 0.490 μs | 41.37 μs | 1.00 | 0.00 |
| Write4Kb | .NET 8.0 | .NET 8.0 | WriteThrough | 4,929.82 μs |
97.550 μs | 267.042 μs | 5,001.38 μs | 115.77 | 6.19 |
| | | | | |
| | | | |
| Write512Kb | .NET 7.0 | .NET 7.0 | WriteThrough | 4,920.57 μs |
95.867 μs | 257.541 μs | 4,963.36 μs | 1.00 | 0.00 |
| Write512Kb | .NET 8.0 | .NET 8.0 | WriteThrough | 5,087.13 μs |
99.106 μs | 250.454 μs | 5,112.59 μs | 1.04 | 0.08 |
| | | | | |
| | | | |
| Write1024Kb | .NET 7.0 | .NET 7.0 | WriteThrough | 5,389.87 μs |
106.514 μs | 242.586 μs | 5,344.43 μs | 1.00 | 0.00 |
| Write1024Kb | .NET 8.0 | .NET 8.0 | WriteThrough | 5,399.41 μs |
106.635 μs | 275.259 μs | 5,349.17 μs | 1.00 | 0.07 |
| | | | | |
| | | | |
| Write16Mb | .NET 7.0 | .NET 7.0 | WriteThrough | 10,069.75 μs |
199.011 μs | 397.447 μs | 9,939.55 μs | 1.00 | 0.00 |
| Write16Mb | .NET 8.0 | .NET 8.0 | WriteThrough | 10,609.77 μs |
207.562 μs | 414.524 μs | 10,532.28 μs | 1.05 | 0.03 |
| | | | | |
| | | | |
| **Write1Kb** | **.NET 7.0** | **.NET 7.0** | **Rando(...)rough [26]** |
**40.71 μs** | **0.808 μs** | **1.415 μs** | **41.18 μs** |
**1.00** | **0.00** |
| Write1Kb | .NET 8.0 | .NET 8.0 | Rando(...)rough [26] | 5,069.47 μs |
98.337 μs | 153.100 μs | 5,086.67 μs | 125.11 | 6.63 |
| | | | | |
| | | | |
| Write2Kb | .NET 7.0 | .NET 7.0 | Rando(...)rough [26] | 39.86 μs |
0.642 μs | 0.502 μs | 39.70 μs | 1.00 | 0.00 |
| Write2Kb | .NET 8.0 | .NET 8.0 | Rando(...)rough [26] | 4,876.37 μs |
97.067 μs | 219.097 μs | 4,917.56 μs | 120.90 | 7.23 |
| | | | | |
| | | | |
| Write4Kb | .NET 7.0 | .NET 7.0 | Rando(...)rough [26] | 41.13 μs |
0.738 μs | 0.654 μs | 41.01 μs | 1.00 | 0.00 |
| Write4Kb | .NET 8.0 | .NET 8.0 | Rando(...)rough [26] | 5,010.03 μs |
97.431 μs | 108.294 μs | 4,998.43 μs | 122.20 | 3.19 |
| | | | | |
| | | | |
| Write512Kb | .NET 7.0 | .NET 7.0 | Rando(...)rough [26] | 5,150.66 μs |
109.929 μs | 320.668 μs | 5,148.15 μs | 1.00 | 0.00 |
| Write512Kb | .NET 8.0 | .NET 8.0 | Rando(...)rough [26] | 5,119.08 μs |
100.497 μs | 140.883 μs | 5,122.52 μs | 1.02 | 0.07 |
| | | | | |
| | | | |
| Write1024Kb | .NET 7.0 | .NET 7.0 | Rando(...)rough [26] | 5,475.21 μs |
108.031 μs | 183.446 μs | 5,480.69 μs | 1.00 | 0.00 |
| Write1024Kb | .NET 8.0 | .NET 8.0 | Rando(...)rough [26] | 5,193.73 μs |
103.179 μs | 160.638 μs | 5,182.32 μs | 0.95 | 0.06 |
| | | | | |
| | | | |
| Write16Mb | .NET 7.0 | .NET 7.0 | Rando(...)rough [26] | 10,108.22 μs |
201.090 μs | 406.212 μs | 10,000.39 μs | 1.00 | 0.00 |
| Write16Mb | .NET 8.0 | .NET 8.0 | Rando(...)rough [26] | 10,041.39 μs |
199.535 μs | 398.493 μs | 9,930.46 μs | 0.99 | 0.03 |
| | | | | |
| | | | |
| **Write1Kb** | **.NET 7.0** | **.NET 7.0** | **Async(...)rough [26]** |
**40.99 μs** | **0.609 μs** | **0.540 μs** | **40.92 μs** |
**1.00** | **0.00** |
| Write1Kb | .NET 8.0 | .NET 8.0 | Async(...)rough [26] | 4,951.12 μs |
95.386 μs | 228.538 μs | 4,981.84 μs | 123.35 | 5.46 |
| | | | | |
| | | | |
| Write2Kb | .NET 7.0 | .NET 7.0 | Async(...)rough [26] | 41.40 μs |
0.418 μs | 0.391 μs | 41.54 μs | 1.00 | 0.00 |
| Write2Kb | .NET 8.0 | .NET 8.0 | Async(...)rough [26] | 4,904.11 μs |
96.342 μs | 187.908 μs | 4,935.10 μs | 119.32 | 5.34 |
| | | | | |
| | | | |
| Write4Kb | .NET 7.0 | .NET 7.0 | Async(...)rough [26] | 40.69 μs |
0.796 μs | 0.852 μs | 40.71 μs | 1.00 | 0.00 |
| Write4Kb | .NET 8.0 | .NET 8.0 | Async(...)rough [26] | 5,124.55 μs |
101.950 μs | 297.392 μs | 5,121.22 μs | 124.31 | 9.37 |
| | | | | |
| | | | |
| Write512Kb | .NET 7.0 | .NET 7.0 | Async(...)rough [26] | 5,129.82 μs |
98.803 μs | 117.618 μs | 5,130.39 μs | 1.00 | 0.00 |
| Write512Kb | .NET 8.0 | .NET 8.0 | Async(...)rough [26] | 5,302.62 μs |
105.567 μs | 278.104 μs | 5,323.11 μs | 1.04 | 0.05 |
| | | | | |
| | | | |
| Write1024Kb | .NET 7.0 | .NET 7.0 | Async(...)rough [26] | 5,414.26 μs |
107.056 μs | 187.501 μs | 5,455.81 μs | 1.00 | 0.00 |
| Write1024Kb | .NET 8.0 | .NET 8.0 | Async(...)rough [26] | 5,625.89 μs |
111.672 μs | 261.030 μs | 5,609.76 μs | 1.05 | 0.07 |
| | | | | |
| | | | |
| Write16Mb | .NET 7.0 | .NET 7.0 | Async(...)rough [26] | 10,061.14 μs |
201.102 μs | 396.956 μs | 9,938.46 μs | 1.00 | 0.00 |
| Write16Mb | .NET 8.0 | .NET 8.0 | Async(...)rough [26] | 10,175.71 μs |
202.610 μs | 481.524 μs | 10,036.81 μs | 1.01 | 0.07 |
| | | | | |
| | | | |
| **Write1Kb** | **.NET 7.0** | **.NET 7.0** | **Rando(...)rough [40]** |
**41.07 μs** | **0.256 μs** | **0.227 μs** | **41.12 μs** |
**1.00** | **0.00** |
| Write1Kb | .NET 8.0 | .NET 8.0 | Rando(...)rough [40] | 5,051.85 μs |
94.100 μs | 122.357 μs | 5,036.35 μs | 122.72 | 3.31 |
| | | | | |
| | | | |
| Write2Kb | .NET 7.0 | .NET 7.0 | Rando(...)rough [40] | 40.25 μs |
0.366 μs | 0.342 μs | 40.19 μs | 1.00 | 0.00 |
| Write2Kb | .NET 8.0 | .NET 8.0 | Rando(...)rough [40] | 5,171.39 μs |
101.519 μs | 177.803 μs | 5,183.12 μs | 127.15 | 4.60 |
| | | | | |
| | | | |
| Write4Kb | .NET 7.0 | .NET 7.0 | Rando(...)rough [40] | 41.20 μs |
0.700 μs | 0.655 μs | 41.17 μs | 1.00 | 0.00 |
| Write4Kb | .NET 8.0 | .NET 8.0 | Rando(...)rough [40] | 5,076.50 μs |
101.333 μs | 160.725 μs | 5,106.31 μs | 122.77 | 4.92 |
| | | | | |
| | | | |
| Write512Kb | .NET 7.0 | .NET 7.0 | Rando(...)rough [40] | 5,235.58 μs |
102.545 μs | 140.365 μs | 5,232.39 μs | 1.00 | 0.00 |
| Write512Kb | .NET 8.0 | .NET 8.0 | Rando(...)rough [40] | 5,143.66 μs |
98.169 μs | 127.647 μs | 5,149.63 μs | 0.98 | 0.04 |
| | | | | |
| | | | |
| Write1024Kb | .NET 7.0 | .NET 7.0 | Rando(...)rough [40] | 5,377.18 μs |
107.115 μs | 287.759 μs | 5,353.74 μs | 1.00 | 0.00 |
| Write1024Kb | .NET 8.0 | .NET 8.0 | Rando(...)rough [40] | 5,292.95 μs |
103.324 μs | 118.988 μs | 5,291.10 μs | 0.98 | 0.05 |
| | | | | |
| | | | |
| Write16Mb | .NET 7.0 | .NET 7.0 | Rando(...)rough [40] | 10,045.56 μs |
196.723 μs | 359.719 μs | 9,975.61 μs | 1.00 | 0.00 |
| Write16Mb | .NET 8.0 | .NET 8.0 | Rando(...)rough [40] | 10,132.24 μs |
200.504 μs | 409.577 μs | 10,062.68 μs | 1.01 | 0.02 |
| | | | | |
| | | | |
| **Write1Kb** | **.NET 7.0** | **.NET 7.0** | **RandomAccess** |
**27.67 μs** | **0.263 μs** | **0.246 μs** | **27.77 μs** |
**1.00** | **0.00** |
| Write1Kb | .NET 8.0 | .NET 8.0 | RandomAccess | 4,458.41 μs |
87.946 μs | 97.752 μs | 4,467.41 μs | 161.07 | 4.47 |
| | | | | |
| | | | |
| Write2Kb | .NET 7.0 | .NET 7.0 | RandomAccess | 27.98 μs |
0.146 μs | 0.136 μs | 27.98 μs | 1.00 | 0.00 |
| Write2Kb | .NET 8.0 | .NET 8.0 | RandomAccess | 4,865.28 μs |
96.690 μs | 233.517 μs | 4,916.11 μs | 172.14 | 12.04 |
| | | | | |
| | | | |
| Write4Kb | .NET 7.0 | .NET 7.0 | RandomAccess | 28.37 μs |
0.228 μs | 0.213 μs | 28.33 μs | 1.00 | 0.00 |
| Write4Kb | .NET 8.0 | .NET 8.0 | RandomAccess | 4,769.64 μs |
93.957 μs | 181.022 μs | 4,769.61 μs | 162.15 | 5.40 |
| | | | | |
| | | | |
| Write512Kb | .NET 7.0 | .NET 7.0 | RandomAccess | 5,007.21 μs |
80.269 μs | 71.156 μs | 5,015.11 μs | 1.00 | 0.00 |
| Write512Kb | .NET 8.0 | .NET 8.0 | RandomAccess | 5,076.00 μs |
82.783 μs | 77.436 μs | 5,062.07 μs | 1.01 | 0.02 |
| | | | | |
| | | | |
| Write1024Kb | .NET 7.0 | .NET 7.0 | RandomAccess | 5,237.61 μs |
104.104 μs | 158.977 μs | 5,247.27 μs | 1.00 | 0.00 |
| Write1024Kb | .NET 8.0 | .NET 8.0 | RandomAccess | 5,219.69 μs |
100.639 μs | 89.214 μs | 5,219.81 μs | 1.01 | 0.04 |
| | | | | |
| | | | |
| Write16Mb | .NET 7.0 | .NET 7.0 | RandomAccess | 12,571.40 μs |
260.453 μs | 763.864 μs | 12,604.09 μs | 1.00 | 0.00 |
| Write16Mb | .NET 8.0 | .NET 8.0 | RandomAccess | 12,711.32 μs |
428.128 μs | 1,255.625 μs | 12,962.35 μs | 1.02 | 0.12 |
| | | | | |
| | | | |
| **Write1Kb** | **.NET 7.0** | **.NET 7.0** | **Asynchronous** |
**27.61 μs** | **0.291 μs** | **0.272 μs** | **27.64 μs** |
**1.00** | **0.00** |
| Write1Kb | .NET 8.0 | .NET 8.0 | Asynchronous | 5,026.22 μs |
98.316 μs | 100.964 μs | 5,003.53 μs | 182.20 | 4.59 |
| | | | | |
| | | | |
| Write2Kb | .NET 7.0 | .NET 7.0 | Asynchronous | 28.23 μs |
0.538 μs | 0.576 μs | 28.34 μs | 1.00 | 0.00 |
| Write2Kb | .NET 8.0 | .NET 8.0 | Asynchronous | 4,946.44 μs |
61.866 μs | 57.870 μs | 4,952.79 μs | 175.12 | 3.58 |
| | | | | |
| | | | |
| Write4Kb | .NET 7.0 | .NET 7.0 | Asynchronous | 28.64 μs |
0.239 μs | 0.224 μs | 28.68 μs | 1.00 | 0.00 |
| Write4Kb | .NET 8.0 | .NET 8.0 | Asynchronous | 4,969.19 μs |
94.254 μs | 88.165 μs | 4,971.37 μs | 173.51 | 2.59 |
| | | | | |
| | | | |
| Write512Kb | .NET 7.0 | .NET 7.0 | Asynchronous | 4,971.69 μs |
53.480 μs | 47.409 μs | 4,978.96 μs | 1.00 | 0.00 |
| Write512Kb | .NET 8.0 | .NET 8.0 | Asynchronous | 5,003.56 μs |
76.701 μs | 64.049 μs | 5,022.03 μs | 1.01 | 0.02 |
| | | | | |
| | | | |
| Write1024Kb | .NET 7.0 | .NET 7.0 | Asynchronous | 5,145.74 μs |
74.349 μs | 69.546 μs | 5,149.54 μs | 1.00 | 0.00 |
| Write1024Kb | .NET 8.0 | .NET 8.0 | Asynchronous | 5,232.12 μs |
87.522 μs | 77.586 μs | 5,208.61 μs | 1.02 | 0.02 |
| | | | | |
| | | | |
| Write16Mb | .NET 7.0 | .NET 7.0 | Asynchronous | 10,666.04 μs |
210.645 μs | 453.436 μs | 10,518.88 μs | 1.00 | 0.00 |
| Write16Mb | .NET 8.0 | .NET 8.0 | Asynchronous | 10,651.27 μs |
211.794 μs | 442.092 μs | 10,555.68 μs | 1.00 | 0.07 |
| | | | | |
| | | | |
| **Write1Kb** | **.NET 7.0** | **.NET 7.0** | **Rando(...)onous [26]** |
**27.64 μs** | **0.541 μs** | **0.722 μs** | **27.79 μs** |
**1.00** | **0.00** |
| Write1Kb | .NET 8.0 | .NET 8.0 | Rando(...)onous [26] | 4,903.27 μs |
89.176 μs | 148.993 μs | 4,925.48 μs | 176.32 | 7.55 |
| | | | | |
| | | | |
| Write2Kb | .NET 7.0 | .NET 7.0 | Rando(...)onous [26] | 28.48 μs |
0.374 μs | 0.312 μs | 28.54 μs | 1.00 | 0.00 |
| Write2Kb | .NET 8.0 | .NET 8.0 | Rando(...)onous [26] | 4,942.60 μs |
97.433 μs | 162.789 μs | 4,956.53 μs | 168.21 | 4.54 |
| | | | | |
| | | | |
| Write4Kb | .NET 7.0 | .NET 7.0 | Rando(...)onous [26] | 28.51 μs |
0.229 μs | 0.203 μs | 28.44 μs | 1.00 | 0.00 |
| Write4Kb | .NET 8.0 | .NET 8.0 | Rando(...)onous [26] | 4,910.03 μs |
58.850 μs | 55.048 μs | 4,930.39 μs | 172.19 | 2.28 |
| | | | | |
| | | | |
| Write512Kb | .NET 7.0 | .NET 7.0 | Rando(...)onous [26] | 5,081.34 μs |
78.255 μs | 73.200 μs | 5,086.79 μs | 1.00 | 0.00 |
| Write512Kb | .NET 8.0 | .NET 8.0 | Rando(...)onous [26] | 5,045.27 μs |
99.064 μs | 114.082 μs | 5,056.80 μs | 0.99 | 0.03 |
| | | | | |
| | | | |
| Write1024Kb | .NET 7.0 | .NET 7.0 | Rando(...)onous [26] | 5,276.99 μs |
104.845 μs | 136.329 μs | 5,274.49 μs | 1.00 | 0.00 |
| Write1024Kb | .NET 8.0 | .NET 8.0 | Rando(...)onous [26] | 5,228.08 μs |
103.547 μs | 286.930 μs | 5,200.77 μs | 0.96 | 0.05 |
| | | | | |
| | | | |
| Write16Mb | .NET 7.0 | .NET 7.0 | Rando(...)onous [26] | 10,703.79 μs |
213.802 μs | 473.770 μs | 10,511.99 μs | 1.00 | 0.00 |
| Write16Mb | .NET 8.0 | .NET 8.0 | Rando(...)onous [26] | 12,362.44 μs |
476.119 μs | 1,373.711 μs | 12,661.85 μs | 1.12 | 0.15 |
```
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