C - series of if statements vs else if time messuring : I am sorry beforehand if my terminology is lacking.
I wrote a code to demonstrate inefficiency of series of if statements vs else/if statements. And the results dont make any sense to me.

It's a simple algorithm that goes through an array (100000000 of elements) and counts occurrences of the elements, being 1,2,3,4,5 or else.

    clock_t time1;
    time1 = clock();
        for (int i=1; i<=n; i++)
        {
            if (arr[i]==1)
                p1++;
            if (arr[i]==2)
                p2++;
            if (arr[i]==3)
                p3++;
            if (arr[i]==4)
                p4++;
            if (arr[i]==5)
                p5++;
            if (!(arr[i]>=1 && arr[i]<=5))
                j++;
        }
    time1 = clock() - time1;

    printf("count of 1s:\t %d\n",p1);
    printf("count of 2s:\t %d\n",p2);
    printf("count of 3s:\t %d\n",p3);
    printf("count of 4s:\t %d\n",p4);
    printf("count of 5s:\t %d\n",p5);
    printf("count of errors:\t %d\n",j);
    printf("\n ---  counting took: %.10f ms---\n",((double)(time1)/CLOCKS_PER_SEC)*1000);

and then the same but with else if

    clock_t time2;
    time2 = clock();
        for (int i=1; i<=n; i++)
        {
            if (arr[i]==1)
                p1++;
            else if (arr[i]==2)
                p2++;
            else if (arr[i]==3)
                p3++;
            else if (arr[i]==4)
                p4++;
            else if (arr[i]==5)
                p5++;
            else j++;
        }
    time2 = clock() - time2;

as expected when given an array of random values from 1 to 5 the else if is faster about two times
BUT (here comes the confusion) when its given an array of thousand 1s I would expect the if series to take the same amount of time bc it has to check every condition even tho the first one is already true - but it takes HALF the time 
and when I give it array of only 5s it is also quicker.

Can anyone explain how it can be faster, please? - Thanks :/ (when I give it ran values from 4 to 5 it is actually takes about the same time as with values from 1 to 5)

[(here are the results of the whole thing [ignore the Czech please])][1]


  [1]: https://i.stack.imgur.com/MfNY5.png