jit-compilation

# JIT Compilation Skill ## Overview Expert skill for just-in-time compilation including profiling, tiered compilation, and deoptimization. ## Capabilities - Implement execution profiling and hot path detection - Design tiered compilation strategies (baseline + optimizing) - Implement on-stack replacement (OSR) - Implement speculative optimizations with guards - Design deoptimization frame reconstruction - Implement inline caching and type feedback - Design code cache management and eviction - Implement method inlining heuristics ## Target Processes - jit-compiler-development.js - bytecode-vm-implementation.js - interpreter-implementation.js ## Dependencies V8/HotSpot architecture references ## Usage Guidelines 1. **Tiered Approach**: Start with a baseline tier, add optimizing tier when profiling data is available 2. **Profile-Guided**: Use profiling data to guide optimization decisions 3. **Speculation**: Implement guards for speculative optimizations with clean deoptimization 4. **OSR**: Implement OSR for long-running loops to benefit from optimization mid-execution 5. **Code Cache**: Implement code cache management to handle memory pressure ## Output Schema ```json { "type": "object", "properties": { "tiers": { "type": "array", "items": { "type": "object", "properties": { "name": { "type": "string" }, "trigger": { "type": "string" } } } }, "profilingMethod": { "type": "string", ...