This is a POC for my Medium article Stop Using Structs!! which compares performance characteristics of structs and classes, with a view to show where structs are misused and contain other reference types.
I tested each configuration with 100 iterations, results are averages in milliseconds, smaller is better :)
| Optimization Level | Class | Struct | Ratio |
|---|---|---|---|
| -Onone (unoptimized) | 47926 | 89411 | ~1.86x |
| -O (single file optimization) | 5981 | 16503 | ~2.76x |
| -O -whole-module-optimization | 372 | 24809 | ~67x |
- Xcode 9.0+
- Swift 4.0+
xcrun -sdk macosx swiftc -O -whole-module-optimization StructvsClassPerformance.swift
./StructvsClassPerformanceLicensed under the terms of the MIT license. See the LICENSE file.
