💡 Easy RISC-V
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🌐 Study Finds Expanding Social Circles May Intensify Polarization
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🃏 Poker Tournament for LLMs
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🤖 AI Can Code, But It Can’t Build Software
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⚙️ Measuring the Hidden Costs of Pass-by-Value
An insightful low-level analysis that bridges practical benchmarking with CPU microarchitecture understanding. A must-read for performance-minded developers and compiler engineers.
A detailed performance study comparing pass-by-value and pass-by-reference for structs in C-like languages. Benchmarks across multiple CPU architectures reveal that small structs add negligible cost, while larger ones cross performance thresholds—most notably near 256 bytes. The author highlights periodic slowdowns in AMD’s Zen CPUs linked to the `rep movs` instruction, suggesting microcode-level inefficiencies. The investigation blends assembly inspection and benchmarking to expose these nuanced hardware behaviors.
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