Assembling a string with a pre-known resulting string length: uses 50% less memory then StringBuilder.
| Method | Job | Runtime | StrLength | Mean | Ratio | Allocated | Alloc Ratio |
|---|---|---|---|---|---|---|---|
| StringBuilder | .NET 10.0 | .NET 10.0 | 5 | 36.88 ns | 1.00 | 120 B | 1.00 |
| DefaultInterpolatedStringHandler | .NET 10.0 | .NET 10.0 | 5 | 149.72 ns | 4.07 | 152 B | 1.27 |
| Concatenation | .NET 10.0 | .NET 10.0 | 5 | 108.69 ns | 2.95 | 248 B | 2.07 |
| StringCreator | .NET 10.0 | .NET 10.0 | 5 | 27.45 ns | 0.75 | 64 B | 0.53 |
| StringBuilder | NativeAOT 10.0 | NativeAOT 10.0 | 5 | 40.36 ns | 1.00 | 120 B | 1.00 |
| DefaultInterpolatedStringHandler | NativeAOT 10.0 | NativeAOT 10.0 | 5 | 176.95 ns | 4.40 | 152 B | 1.27 |
| Concatenation | NativeAOT 10.0 | NativeAOT 10.0 | 5 | 145.19 ns | 3.61 | 248 B | 2.07 |
| StringCreator | NativeAOT 10.0 | NativeAOT 10.0 | 5 | 37.59 ns | 0.93 | 64 B | 0.53 |
| StringBuilder | .NET 10.0 | .NET 10.0 | 25 | 112.02 ns | 1.00 | 200 B | 1.00 |
| DefaultInterpolatedStringHandler | .NET 10.0 | .NET 10.0 | 25 | 531.40 ns | 4.74 | 672 B | 3.36 |
| Concatenation | .NET 10.0 | .NET 10.0 | 25 | 623.67 ns | 5.57 | 1848 B | 9.24 |
| StringCreator | .NET 10.0 | .NET 10.0 | 25 | 104.48 ns | 0.93 | 104 B | 0.52 |
| StringBuilder | NativeAOT 10.0 | NativeAOT 10.0 | 25 | 144.13 ns | 1.00 | 200 B | 1.00 |
| DefaultInterpolatedStringHandler | NativeAOT 10.0 | NativeAOT 10.0 | 25 | 616.37 ns | 4.28 | 672 B | 3.36 |
| Concatenation | NativeAOT 10.0 | NativeAOT 10.0 | 25 | 817.48 ns | 5.67 | 1848 B | 9.24 |
| StringCreator | NativeAOT 10.0 | NativeAOT 10.0 | 25 | 149.63 ns | 1.04 | 104 B | 0.52 |
| StringBuilder | .NET 10.0 | .NET 10.0 | 100 | 406.36 ns | 1.00 | 496 B | 1.00 |
| DefaultInterpolatedStringHandler | .NET 10.0 | .NET 10.0 | 100 | 1,949.56 ns | 4.80 | 2624 B | 5.29 |
| Concatenation | .NET 10.0 | .NET 10.0 | 100 | 2,744.22 ns | 6.75 | 14976 B | 30.19 |
| StringCreator | .NET 10.0 | .NET 10.0 | 100 | 392.47 ns | 0.97 | 256 B | 0.52 |
| StringBuilder | NativeAOT 10.0 | NativeAOT 10.0 | 100 | 530.65 ns | 1.00 | 496 B | 1.00 |
| DefaultInterpolatedStringHandler | NativeAOT 10.0 | NativeAOT 10.0 | 100 | 2,378.89 ns | 4.49 | 2624 B | 5.29 |
| Concatenation | NativeAOT 10.0 | NativeAOT 10.0 | 100 | 3,869.99 ns | 7.30 | 14976 B | 30.19 |
| StringCreator | NativeAOT 10.0 | NativeAOT 10.0 | 100 | 562.36 ns | 1.06 | 256 B | 0.52 |
| StringBuilder | .NET 10.0 | .NET 10.0 | 1000 | 3,891.79 ns | 1.00 | 4096 B | 1.00 |
| DefaultInterpolatedStringHandler | .NET 10.0 | .NET 10.0 | 1000 | 19,318.02 ns | 4.96 | 26024 B | 6.35 |
| Concatenation | .NET 10.0 | .NET 10.0 | 1000 | 63,794.51 ns | 16.39 | 1049976 B | 256.34 |
| StringCreator | .NET 10.0 | .NET 10.0 | 1000 | 3,693.73 ns | 0.95 | 2056 B | 0.50 |
| StringBuilder | NativeAOT 10.0 | NativeAOT 10.0 | 1000 | 5,190.07 ns | 1.00 | 4096 B | 1.00 |
| DefaultInterpolatedStringHandler | NativeAOT 10.0 | NativeAOT 10.0 | 1000 | 23,148.44 ns | 4.47 | 26024 B | 6.35 |
| Concatenation | NativeAOT 10.0 | NativeAOT 10.0 | 1000 | 72,140.25 ns | 13.95 | 1049976 B | 256.34 |
| StringCreator | NativeAOT 10.0 | NativeAOT 10.0 | 1000 | 5,201.16 ns | 1.01 | 2056 B | 0.50 |
Usage:
var stringCreator = new StringCreator.Class.StringCreator(50); for (int i = 0; i < 50; i++) { stringCreator.Append($"{i % 10}"); } var result = stringCreator.ToString();