Swift Benchmark 2025: How the iOS/macOS Language Beats Competitors

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Swift vs Competitors in 2025: What Performance Tests Showed

The Swift language, created by Apple for the iOS and macOS ecosystems, continues to evolve. In 2025, a new round of benchmarks took place, comparing Swift with its main competitors: Kotlin (Android), Rust (systems programming), Go (backend), and Python (science/ML). The results surprised many developers.

Testing Methodology

Tests were conducted on unified hardware (MacBook Pro M4 Pro, 32 GB RAM). Three key metrics were measured:

Execution speed — time to solve classic algorithmic tasks (sorting, search, graph operations).
Memory consumption — peak RAM usage under identical workloads.
Compilation speed — build time for a typical project (REST API with 50 endpoints).

Benchmark Results

In speed tests, Swift took second place, losing only to Rust but significantly outperforming Kotlin and Go. Here are the details:

Array sorting (1 million elements): Swift — 0.12 s, Rust — 0.09 s, Kotlin — 0.35 s, Go — 0.28 s, Python — 4.2 s.
Graph search (BFS, 500 thousand nodes): Swift — 0.08 s, Rust — 0.06 s, Kotlin — 0.21 s, Go — 0.19 s, Python — 3.8 s.
Memory consumption (peak): Swift — 45 MB, Rust — 38 MB, Kotlin — 72 MB, Go — 55 MB, Python — 210 MB.
Project compilation: Swift — 6.4 s, Rust — 9.1 s, Kotlin — 7.8 s, Go — 4.2 s, Python — 0.5 s (interpreter).

Why Is Swift So Good in 2025?

The key factor is the new Swift 6.0 compiler, which introduced full memory ownership and improved optimization for Apple Silicon's ARM architecture. This narrowed the gap with Rust, traditionally considered the king of performance. Additionally, Swift has come close to Go in compilation speed while remaining a safer language.

For iOS and macOS developers, this means Swift applications run faster, consume less battery and memory than Kotlin (for Android) or hybrid solutions. However, if your project requires absolute performance (e.g., a game engine or embedded), Rust remains the #1 choice.

Conclusions for Developers

The 2025 benchmark confirms: Swift is a mature and fast language that is no longer a compromise between development speed and performance. It is ideal for:

Native Apple applications (iOS, macOS, watchOS, tvOS).
Server-side development (the Vapor framework shows excellent results).
Cross-platform projects (via SwiftUI + Kotlin Multiplatform — with caveats).

If you are looking for a balance between Swift's convenience, Rust's speed, and Go's ecosystem, take a closer look at Swift — in 2025, it has become one of the most balanced languages in the programming world.