Tag
interpreters
- Jul 20, 2026 Stack Machines and Register Machines as Bytecode Targets Why bytecode formats choose implicit stack operands or named registers, and what that choice costs in encoding width, instruction count, and verifier complexity. language runtimes
- Nov 26, 2025 Computed Goto and Direct Threading in Bytecode Interpreters How the dispatch loop dominates interpreter cost, and why a table of label addresses beats a switch statement on the same instruction stream. language runtimes
- Sep 24, 2025 How an Interpreter Lays Out a Stack Frame The header, locals, operand stack, and spill area of an interpreter frame, and why the frame is allocated as one block with a fixed maximum size. language runtimes
- Jan 27, 2024 Stack Bytecode: Fixed Stack Effects and the Dispatch Loop How a stack machine encodes operands implicitly in the stack pointer, why verifiers care about static stack depth, and what the dispatch loop costs per instruction. programming languages
- Jun 22, 2023 Compile-Time Function Evaluation and Its Limits How a compiler runs ordinary functions during translation, why the interpreter inside the compiler must refuse some operations, and where the boundary between constant folding and program execution falls. programming languages
- Apr 13, 2023 Resumable Frames for Generators and Coroutines Why a generator cannot keep its state on the machine stack, how its frame is moved to the heap, and what suspension costs in copying and in bookkeeping. language runtimes
- Feb 26, 2023 Tree-Walking Interpretation and the Cost of Re-Deciding at Every Node Why an interpreter that evaluates syntax nodes spends most of its time on type dispatch and environment lookup, and which of those costs a bytecode compiler removes. programming languages
- Feb 24, 2023 Line Tables, Breakpoints, and Single Stepping in an Interpreter How a debugger maps a bytecode offset back to a source line, how breakpoints are placed without corrupting the code, and what stepping costs per instruction. language runtimes
- Jan 30, 2023 Register Bytecode and Windowed Register Allocation in Lua How a register-based VM names operands inside a per-call window, why that cuts instruction count, and what the compiler must compute to keep the window small. programming languages
- Dec 12, 2021 Free Monads and Defunctionalized Interpreters How a free monad turns a program into a syntax tree of requests, why the interpreter is a fold, and where the left-nested bind makes that tree quadratic. programming languages