When adding initial data to ConcurrentBag<>, how expensive is to .Add individual value and what approach is better?
BenchmarkDotNet=v0.13.1, OS=Windows 10.0.19044.2075 (21H2)
Intel Core i7-7600U CPU 2.80GHz (Kaby Lake), 1 CPU, 4 logical and 2 physical cores
.NET SDK=6.0.401
[Host] : .NET 6.0.9 (6.0.922.41905), X64 RyuJIT
DefaultJob : .NET 6.0.9 (6.0.922.41905), X64 RyuJIT
| Method | Mean | Error | StdDev | Median | Ratio | RatioSD | Gen 0 | Gen 1 | Allocated |
|---|---|---|---|---|---|---|---|---|---|
| AddOnInitialization | 3.831 μs | 0.0603 μs | 0.0503 μs | 3.832 μs | 0.73 | 0.01 | 0.3624 | 0.1793 | 2 KB |
| TryAddAfterInitialization | 5.257 μs | 0.0885 μs | 0.0785 μs | 5.239 μs | 1.00 | 0.00 | 0.3586 | 0.1755 | 2 KB |
| TryAddAfterInitializationForEach | 5.526 μs | 0.2318 μs | 0.6835 μs | 5.116 μs | 1.22 | 0.04 | 0.3662 | 0.1831 | 2 KB |