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JavaAdvanced#jvm

What is JIT compilation?

The Just-In-Time compiler translates frequently executed bytecode ('hot' methods) into optimized native machine code at runtime, improving performance beyond pure interpretation, using tiered compilation levels (C1, C2) for different optimization strengths.

Example
// A loop executed millions of times gets JIT-compiled after the JVM detects it's 'hot',
// replacing interpreted bytecode execution with optimized native code

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