$pathsByType = $this->normalizePathsByType( $pathsByType );
$msleep = array( 0, 50, 100, 300, 500 ); // retry backoff times
$start = microtime( true );
$pathsByType = $this->normalizePathsByType( $pathsByType );
$msleep = array( 0, 50, 100, 300, 500 ); // retry backoff times
$start = microtime( true );