Some benchmarks of the IEnumerable extension method .AsQueryable().
| Method | Job | Runtime | Mean | Error | StdDev | Median |
|---|---|---|---|---|---|---|
| InlineEnumerable | .NET 6.0 | .NET 6.0 | 827.9 ns | 26.48 ns | 73.37 ns | 801.0 ns |
| InlineQueryable | .NET 6.0 | .NET 6.0 | 5,384,721.5 ns | 106,356.81 ns | 180,601.93 ns | 5,339,189.8 ns |
| ExtensionMethodQueryable | .NET 6.0 | .NET 6.0 | 8,728,990.5 ns | 495,489.06 ns | 1,453,183.64 ns | 8,198,828.1 ns |
| ExtensionMethodEnumerable | .NET 6.0 | .NET 6.0 | 1,325.1 ns | 56.01 ns | 162.50 ns | 1,265.9 ns |
| InlineEnumerable | .NET Core 3.1 | .NET Core 3.1 | 1,211.2 ns | 52.47 ns | 149.69 ns | 1,154.2 ns |
| InlineQueryable | .NET Core 3.1 | .NET Core 3.1 | 6,504,211.8 ns | 212,455.56 ns | 616,372.09 ns | 6,213,507.0 ns |
| ExtensionMethodQueryable | .NET Core 3.1 | .NET Core 3.1 | 8,186,277.6 ns | 148,351.28 ns | 131,509.54 ns | 8,136,007.0 ns |
| ExtensionMethodEnumerable | .NET Core 3.1 | .NET Core 3.1 | 1,941.5 ns | 78.50 ns | 231.45 ns | 1,884.7 ns |
| InlineEnumerable | .NET Framework 4.8 | .NET Framework 4.8 | 1,142.4 ns | 44.23 ns | 129.71 ns | 1,099.5 ns |
| InlineQueryable | .NET Framework 4.8 | .NET Framework 4.8 | 9,070,071.2 ns | 378,424.93 ns | 1,115,794.44 ns | 8,390,901.6 ns |
| ExtensionMethodQueryable | .NET Framework 4.8 | .NET Framework 4.8 | 12,395,017.0 ns | 357,850.87 ns | 1,026,741.21 ns | 11,874,745.3 ns |
| ExtensionMethodEnumerable | .NET Framework 4.8 | .NET Framework 4.8 | 1,875.9 ns | 86.84 ns | 256.06 ns | 1,739.5 ns |