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The Java HotSpot VM PDF 下载
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Interpretation vs. compilation in HotSpot
• Template-based interpreter
– Generated at VM startup (before program execution)
– Maps a well-defined machine code sequence to every bytecodeinstruction
• Compilation system
– Speedup relative to interpretation: ~100X
– Two just-in-time compilers (C1, C2)
– Aggressive optimistic optimizations
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