Serilog provides a deestructuring operator to preserve object structure while logging.
But that comes with a cost.
This benchmark measures the logging with LogEventLevel.Debug and LogEventLevel.Information to a logger configured with LogEventLevel.Information.
BenchmarkDotNet v0.13.8, Windows 11 (10.0.22621.2428/22H2/2022Update/SunValley2)
13th Gen Intel Core i9-13900K, 1 CPU, 32 logical and 24 physical cores
.NET SDK 8.0.100-rc.2.23502.2
[Host] : .NET 8.0.0 (8.0.23.47906), X64 RyuJIT AVX2
Job-FAODUB : .NET 6.0.23 (6.0.2323.48002), X64 RyuJIT AVX2
Job-JVGSRH : .NET 7.0.12 (7.0.1223.47720), X64 RyuJIT AVX2
Job-DMVWKG : .NET 8.0.0 (8.0.23.47906), X64 RyuJIT AVX2
| Method | Runtime | LogEventLevel | Mean | Ratio | Gen0 | Allocated | Alloc Ratio |
|---|---|---|---|---|---|---|---|
| DiscreteProperties | .NET 6.0 | Debug | 12.073 ns | 1.62 | 0.0055 | 104 B | 1.00 |
| PropertyDestructuring | .NET 6.0 | Debug | 4.979 ns | 0.67 | - | - | 0.00 |
| DiscreteProperties | .NET 7.0 | Debug | 9.876 ns | 1.34 | 0.0055 | 104 B | 1.00 |
| PropertyDestructuring | .NET 7.0 | Debug | 6.015 ns | 0.81 | - | - | 0.00 |
| DiscreteProperties | .NET 8.0 | Debug | 7.336 ns | 1.00 | 0.0055 | 104 B | 1.00 |
| PropertyDestructuring | .NET 8.0 | Debug | 5.093 ns | 0.69 | - | - | 0.00 |
| DiscreteProperties | .NET 6.0 | Information | 247.958 ns | 1.31 | 0.0358 | 680 B | 1.00 |
| PropertyDestructuring | .NET 6.0 | Information | 923.810 ns | 4.87 | 0.0877 | 1664 B | 2.45 |
| DiscreteProperties | .NET 7.0 | Information | 227.196 ns | 1.20 | 0.0360 | 680 B | 1.00 |
| PropertyDestructuring | .NET 7.0 | Information | 697.015 ns | 3.67 | 0.0877 | 1664 B | 2.45 |
| DiscreteProperties | .NET 8.0 | Information | 189.758 ns | 1.00 | 0.0360 | 680 B | 1.00 |
| PropertyDestructuring | .NET 8.0 | Information | 525.235 ns | 2.77 | 0.0877 | 1664 B | 2.45 |
While it shows that when the log is not emitted (LogEventLevel.Debug) the performance os property destructuring (both in CPU and memory)
is better than the performance of discrete properties, that drastically changes when the log is emitted (LogEventLevel.Information).