Dekompiling
summary
Walks through a concrete Kotlin example and the IDE tools used to inspect what actually runs: use Show Kotlin bytecode and the decompiler to see top‑level functions become static methods, extension receivers become the first parameter, and non‑null checks compile to Intrinsics.checkParameterIsNotNull calls. Demonstrates lambdas compiling to FunctionN interfaces, captured variables using an ObjectRef wrapper, the compiler folding stateless lambdas into a singleton, and how marking helpers inline removes allocations so the optimized bytecode matches hand‑written StringBuilder code.
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chapters (9)
- 0:00Introduction to decompiling
- 3:27Kotlin to bytecode process
- 8:25Improving the multiply function
- 13:24Extracting loop logic
- 21:06Lambda optimizations
- 27:04String concatenation inefficiency
- 30:33Using buildString helper
- 35:27Standard library functions
- 37:13Further resources and conclusion
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