exponential-backoff-test.php

<?php

function eb($retries)
{
    return mt_rand(0, (int) min(20000, (int) pow(2, $retries) * 100));
}

for($i = 0; $i < 10; $i++)
{
    echo "Round $i\n";
    for($r = 0; $r < 3; $r++)
    {
        echo " ".eb($r)."\n";
    }
}

/*
Round 0
 8
 177
 290
Round 1
 22
 163
 275
Round 2
 52
 153
 123
Round 3
 95
 62
 390
Round 4
 56
 107
 137
Round 5
 33
 25
 309
Round 6
 77
 45
 350
Round 7
 40
 91
 52
Round 8
 18
 26
 17
Round 9
 27
 173
 62
*/