perf(parser): optimize delimiter parsing and improve code clarity

[IamCoder18]

Description

This Pull Request introduces significant performance optimizations to our delimiter parsing logic, enhances code readability through clearer constants, and expands test coverage to ensure the robustness and correctness of these improvements.

Key Changes:

• Performance Optimization for Delimiter Parsing:

  • Pre-compiled Regular Expressions: Delimiter regular expressions are now pre-compiled once when the delimiters array is initialized. This eliminates redundant regex compilation within the parseDelimiters loop, leading to faster parsing, especially for large inputs.
  • Optimized Placeholder Unescaping: The unescapeCharacters and revertEscapedCharacters functions have been refactored to use a single, pre-compiled regular expression for all placeholder replacements. This single pass, combined with a replacer function, is significantly more efficient than iterating through replaceAll calls for each placeholder.

• Increased Code Clarity:

  • Named Placeholder Constants: The "magic string" placeholder characters ('𜰀' and '𜰃') have been replaced with descriptive named constants (BACKSLASH_PLACEHOLDER and DOLLAR_PLACEHOLDER). This makes the code's intent immediately clear and improves maintainability.
  • esModuleInterop in tsconfig.json: Enabled esModuleInterop in tsconfig.json for better compatibility and cleaner import statements when dealing with mixed ES Module and CommonJS module environments.
  • Cleaned up package.json scripts: The redundant dev script has been removed, streamlining the available development commands.

• Expanded Test Coverage:

  • New unit tests have been added or existing ones updated to specifically target the optimized parsing logic and ensure the correctness of the new placeholder handling and regex behavior. This provides greater confidence in the stability of these core functionalities.

Why these changes?

These modifications are crucial for several reasons:

• Faster Execution: The performance optimizations will lead to quicker processing of text containing delimiters, improving the overall responsiveness of features relying on this parsing.
• Improved Maintainability: Clearer code with named constants and streamlined scripts reduces the cognitive load for developers, making the codebase easier to understand, debug, and extend.
• Enhanced Reliability: The expanded test coverage provides a stronger safety net, catching potential regressions early and ensuring the accuracy of our parsing logic.

Testing Notes:

• All existing tests pass, validating no regressions were introduced.
• New tests specifically cover the refactored parseDelimiters, unescapeCharacters, and revertEscapedCharacters functions.
• Performance improvements can be observed by running parsing operations on large text inputs.