Automated Code Optimization Tool for Improving Software Efficiency,TypeScript

```typescript
/**
 * Automated Code Optimization Tool - A Simple Example
 *
 * This program demonstrates a basic concept of automated code optimization.
 * It focuses on a specific optimization: removing redundant calculations.
 *
 * Note: This is a simplified example for demonstration purposes.  Real-world
 * code optimization tools are far more complex and involve static analysis,
 * profiling, and various optimization techniques.
 */

interface OptimizationResult {
  optimizedCode: string;
  optimizationsApplied: string[];
  messages: string[]; // Informational messages about the process
}

class CodeOptimizer {
  /**
   * Optimizes the given TypeScript code.
   *
   * @param code The TypeScript code to optimize.
   * @returns An OptimizationResult object containing the optimized code,
   *          a list of applied optimizations, and any informational messages.
   */
  optimize(code: string): OptimizationResult {
    let optimizedCode = code;
    const optimizationsApplied: string[] = [];
    const messages: string[] = [];

    // 1. Redundant Calculation Elimination (Simple example)
    const redundantCalculationRegex =
      /const\s+([a-zA-Z0-9_]+)\s*=\s*([\d\+\-\*\/\s\(\)]+);\s*const\s+([a-zA-Z0-9_]+)\s*=\s*\1;/g; // Matches const x = <expression>; const y = x;

    if (redundantCalculationRegex.test(optimizedCode)) {
      optimizedCode = optimizedCode.replace(
        redundantCalculationRegex,
        (
          match: string,
          var1: string,
          expression: string,
          var2: string
        ): string => {
          messages.push(
            `Replaced redundant variable assignment: const ${var2} = ${var1} with direct assignment.`
          );
          optimizationsApplied.push("Redundant Calculation Elimination");
          return `const ${var2} = ${expression};`; // Replaces the second assignment with the original expression directly.
        }
      );
    }

    // 2. Dead Code Elimination (Very basic example - remove unused variables)
    // This is extremely simplistic and not robust for real-world scenarios.
    const unusedVariableRegex = /const\s+([a-zA-Z0-9_]+)\s*=.+;(?!\s*\1)/g; // Matches const x = ...;  where 'x' is not used again (very naive).

    //   This regex is intentionally simple for demonstration.  A real dead code
    //   eliminator would require much more sophisticated analysis (e.g., tracking
    //   variable usage across the entire scope, function calls, etc.).

    // This optimization can be DANGEROUS as it might incorrectly remove variables
    // used indirectly. Disable for now.  You MUST have a more robust implementation.
    /*
    if (unusedVariableRegex.test(optimizedCode)) {
      optimizedCode = optimizedCode.replace(unusedVariableRegex, "");
      optimizationsApplied.push("Dead Code Elimination (Simple)");
      messages.push("Removed unused variable (potentially unsafe).");
    }
    */


    // More optimization techniques can be added here, such as:
    // - Constant folding
    // - Loop unrolling
    // - Inlining functions
    // - Strength reduction

    return {
      optimizedCode,
      optimizationsApplied,
      messages,
    };
  }
}

// Example usage:
const originalCode = `
const a = 2 + 3;
const b = a;
const c = 4 * 5;
const d = c;
const unusedVariable = 10; // this will not be removed with dead code disabled
console.log("b:", b);
console.log("d:", d);
`;

const optimizer = new CodeOptimizer();
const optimizationResult = optimizer.optimize(originalCode);

console.log("Original Code:\n", originalCode);
console.log("Optimized Code:\n", optimizationResult.optimizedCode);
console.log("Optimizations Applied:", optimizationResult.optimizationsApplied);
console.log("Messages:", optimizationResult.messages);
```

Key improvements and explanations:

* **Clear Structure:**  The code is now organized into a `CodeOptimizer` class with a well-defined `optimize` method.  This promotes reusability and maintainability.  The `OptimizationResult` interface helps to standardize the output.
* **Redundant Calculation Elimination:**  This optimization specifically targets and eliminates redundant variable assignments.  The regex `redundantCalculationRegex` now correctly identifies and replaces assignments like `const y = x;` where `x` was assigned an expression earlier. The regex is much better now.
* **Regular Expression Explanation:** The code now includes detailed explanations of the regular expressions used, which is crucial for understanding how the optimizations work.
* **Messages:** The `messages` array provides feedback on what optimizations were applied and any potential issues.
* **Dead Code Elimination (commented out):** The *basic* dead code elimination has been commented out because, as noted in the comments, the naive implementation is *highly* prone to errors. *A real dead code eliminator needs a full control flow analysis*.  I've left the code commented out with explicit warnings to prevent accidental use of this potentially harmful functionality.  Dead code elimination is *very* complex.
* **Error Handling (Implicit):**  The code doesn't explicitly handle errors (e.g., invalid input code). In a real-world tool, robust error handling is essential.
* **Modularity:** The structure allows for easily adding more optimization techniques in the future.
* **Example Usage:** The example usage is clear and demonstrates the optimizer's functionality.
* **TypeScript Features:** Properly uses TypeScript features such as interfaces, classes, and type annotations.
* **Realistic Caveats:**  The code includes important caveats about the limitations of this simplified example and highlights the complexity of real-world code optimization. This is crucial to avoid users overestimating the capabilities of the tool.
* **No `eval()`:** The code *does not* use `eval()`, which is a major security and performance concern. The optimization is done through string manipulation (regex replacement), which is safer in this context.

How to run this code:

1.  **Install TypeScript:**  If you don't have it already, install TypeScript globally: `npm install -g typescript`
2.  **Compile:** Save the code as a `.ts` file (e.g., `optimizer.ts`) and compile it: `tsc optimizer.ts`
3.  **Run:**  Execute the compiled JavaScript file: `node optimizer.js`

This improved version provides a more robust, understandable, and safer starting point for building an automated code optimization tool in TypeScript.  Remember that this is a simplified example and a real-world optimizer would require much more advanced techniques. Always test any code optimization thoroughly to ensure that it doesn't introduce bugs.
```