Observed Signal · Sep 9, 2026 · Technical Release · Source: DEV Community · Impact: 2/5 · Sentiment: Positive
Infrastructure Market: Dedicated macOS CI runners benchmarked faster than GitHub-hosted
This article presents a benchmark comparing dedicated macOS runners from Manzanita against GitHub-hosted macOS runners across five open-source projects. The author, who works on Manzanita, forked the projects and changed only the runner label. Results show significant speedups for simulator-heavy iOS tests and clean compiles, with up to 4.74x faster build steps. However, short jobs dominated by cache I/O could be slower, and projects requiring non-Apple toolchains or specific Xcode versions may not benefit. The article also mentions a flat monthly pricing model for dedicated runners.
Benchmark comparison of CI infrastructure relevant to development workflows in AdTech, but not directly impacting advertising technology.
Key Takeaways & Evidence Grounding
- Manzanita's dedicated macOS runners outperformed GitHub-hosted runners in benchmark tests.
- The argmax-oss-swift iOS test job ran 3.13x faster on Manzanita (25m54s to 8m16s).
- TablePro's iOS test step ran 3.81x faster on Manzanita (9m50s to 2m35s).
- SwiftLM's build-and-unit-test job ran 2.45x faster on Manzanita (20m31s to 8m22s).
- Three short jobs in SwiftLM were slower on the dedicated runner due to cache I/O.
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