Just-In-Time (JIT) Profiling & Tiered Compilation Scaffold

Seed: runtime_metrics, hot_methods_sampler, tiered_jit_rules; example: profile, optimize hot paths, deopt as needed

Implementation Guide

Build a profiling scaffolding for JIT compilers that records hot methods, guides tiered compilation decisions, and enables dynamic recompilation with deoptimization and safepoints. Include tooling to replay production traces for offline tuning and benchmarks to validate performance regressions.

💡 Expert Q&A Insights

Q: \

How to avoid wrong optimizations?\" \"

Q: Use guards and deoptimization to revert unsafe speculative optimizations when runtime assumptions break.\"\n\"

How to test JIT changes?\" \"

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