Engine Architecture

SmartCal v1.1 is built on a complete 3-stage compilation pipeline: Lexing $\rightarrow$ Parsing $\rightarrow$ Code Generation / Execution.

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The 4 Optimization Pillars

1. Zero-Allocation Scanner: The scanner never splits the string with .split(" ") or global regular expressions. It traverses the string via a direct memory cursor using charCodeAt().

2. Linear Pratt Parser: Unlike the traditional Shunting-Yard algorithm which struggles with nested ternaries and right-associative powers, the Pratt Parser analyzes the expression in a single clean recursive pass guided by Binding Power.

3. JIT Code Generation: In compiled mode, the AST is translated into pure JavaScript code (e.g., return ((data['a'] || 0) + (data['b'] || 0) * 2)), then compiled into a native function via new Function(). The V8 JavaScript engine can then optimize it via its TurboFan compiler.

4. Topological Sub-Formula Resolution: Nested formulas (f_*) are resolved in a single topological order with caching, eliminating the exponential degradation observed in v1.0.14.