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возникла проблема со скоростью выполнения кода

function partsSums(ls) {
  const result = new Array(ls.length + 1);
  result[ls.length] = 0;

  for (let i = ls.length - 1; i > -1; i--) {
    result[i] = result[i + 1] + ls[i];
  }

  return result;
}

const km = [25, 45,  95, 125, 150, 200, 325, 250, 165, 350]

const cof = [1, 1.5, 1,  1.5, 1.2, 1.5, 1 ,  0.5, 1.2, 1.5];

// как то так
const res = cof.reduce((a,v,i)=>(a[v]=(a[v]||0)+km[i],a),{});

console.log(res); // { 1: 445, "1.5": 720, "1.2": 315, "0.5": 250 }

console.log(Object.values(res)); // [445, 720, 315, 250];

public static bool isProf(string special)
        {
            dynamic sl = JObject.Parse(File.ReadAllText(@"..\..\..\..\data\source\specialization.json"));

            foreach (var property in sl.specialization)
            {
                if (property == special)
                {
                    return true;
                }
            }
            return false;
        }

public static bool isProf(string special)
        {
            var sl = JObject.Parse(File.ReadAllText(@"..\..\..\..\data\source\specialization.json"));
            return sl.specialization.Any(e => e == special);         
        }

for (i = 1; i < 10000;  i++) {
  for (j = i+1; j <= 10000; j++) {
    // пара [i, j]
  }
}

delta = arr[1] - arr[0]
max_count = 2
count = 2
for (i = 1; i < length(arr)-1; i += 1) {
  if (arr[i+1] - arr[i] == delta) {
    count += 1
  } else {
    delta = arr[i+1] - arr[i]
    count = 2
  }
  if (count > max_count) {
    max_count = count
  }
}

function moveToStart(array, n) {
    return [...array.slice(-n),...array.slice(0, array.length - n)]
}