test_step(count($targets) != 1 ? -1 : 0);
@$lookups[$targets[0]]++;
}
$mean = 0;
$deviation = 0;
foreach ($lookups as $value) {
$mean += $value;
}
$mean = $mean / count($lookups);
foreach ($lookups as $value) {
$deviation += pow($value - $mean, 2);
}
test_end('deviation is ' . sprintf('%.2f', sqrt($deviation / count($lookups))));
test_start('lookupBalance');
$lookups = array();
for ($index = 0; $index < CANDIDATES; $index++) {
$target = $chash->lookupBalance('candidate001', 10);
test_step($target == '' ? -1 : 0);
@$lookups[$target]++;
}
$mean = 0;
$deviation = 0;
foreach ($lookups as $value) {
$mean += $value;
}
$mean = $mean / count($lookups);
foreach ($lookups as $value) {
$deviation += pow($value - $mean, 2);
}
test_end('deviation is ' . sprintf('%.2f', sqrt($deviation / count($lookups))));
print "\n";