What are some alternative methods or functions in PHP that can be used to calculate the top 10% values from a dataset more efficiently than the current approach?

Calculating the top 10% values from a dataset using the current approach of sorting the entire dataset can be inefficient, especially for large datasets. An alternative method to efficiently calculate the top 10% values is to use a combination of array functions in PHP such as array_slice and array_sum to extract and sum the top 10% values directly without sorting the entire dataset.

// Sample dataset
$data = [15, 20, 10, 5, 25, 30, 40, 35, 45, 50];

// Calculate the number of elements representing the top 10%
$top_10_percent_count = ceil(count($data) * 0.1);

// Sort the dataset in descending order
rsort($data);

// Extract the top 10% values
$top_10_percent_values = array_slice($data, 0, $top_10_percent_count);

// Calculate the sum of the top 10% values
$sum_top_10_percent = array_sum($top_10_percent_values);

echo "Sum of top 10% values: " . $sum_top_10_percent;