⚡ Bolt: Combine multiple O(n) array iterations in updateStatistics

[alvin000009238]

💡 What: Combined .map(), Math.max(), and .forEach() into a single for loop in updateStatistics.
🎯 Why: Reduces array iterations from 3 to 1 and avoids creating intermediate arrays, reducing overhead and garbage collection.
📊 Impact: O(n) time complexity with a smaller constant factor, reducing memory allocation for the intermediate scores array.
🔬 Measurement: Observe memory footprint and CPU time when updateStatistics runs with many subjects.

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PR created automatically by Jules for task 16965415279500453763 started by @alvin000009238

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[Copilot]

Pull request overview

This PR optimizes the dashboard statistics calculation by consolidating multiple passes over the subjects array into a single loop to reduce iteration overhead and avoid intermediate allocations.

Changes:

• Replaced map() + Math.max() + forEach() with a single indexed for loop in updateStatistics.
• Tracks highest, totalWeightedScore, and totalWeight in one pass.

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[Copilot]

highest is initialized to -Infinity and only updated when score > highest. If any subject.scoreValue is NaN (possible if getNumericScore() returns NaN), comparisons will be false and highest may remain -Infinity, which then gets rendered to the UI. Also, totalWeightedScore += score * weight will become NaN and propagate into the average. Consider skipping non-finite scores (e.g., Number.isFinite(score)) and, if no valid scores are found, render '--' (or 0) instead of -Infinity/NaN.

[gemini-code-assist]

Code Review

This pull request optimizes the updateStatistics function in frontend/dashboard.js by consolidating multiple array iterations into a single loop to reduce overhead and improve performance. The reviewer suggested using a for...of loop instead of a traditional for loop to enhance code readability while maintaining the performance benefits of the single-pass approach.

[gemini-code-assist]

While using a standard for loop is efficient, using for...of is generally preferred in modern JavaScript for better readability when the index is not required. Given that this is a performance-oriented change, for...of is highly optimized in modern engines and would maintain the 'Bolt' performance goals while improving code clarity.

    for (const subject of subjects) {
        const score = subject.scoreValue;

        if (score > highest) highest = score;

        const weight = getSubjectWeight(subject.SubjectName);
        totalWeightedScore += score * weight;
        totalWeight += weight;
    }