10亿次的比较--PHP”与“运算和”模“运算效率比较

<?php
set_time_limit(0);
$i = 1;
$t1 = microtime(true);
while($i < 1000000001){
$i ++ & 1;
}
$t2 = microtime(true);
echo $t2 - $t1;

<?php
set_time_limit(0);
$i = 1;
$t1 = microtime(true);
while($i < 1000000001){
$i ++ % 2;
}
$t2 = microtime(true);
echo $t2 - $t1;