Yac is only faster on apc in some special cases about yac HOT 7 CLOSED

extension=yac.so
yac.enable = 1
yac.keys_memory_size = 4M
yac.values_memory_size = 64M
yac.compress_threshold = -1

apc_clear_cache();

$start = microtime(true);
for ($i = 0; $i<10000; $i++) {
$key = "xxx".rand(1,100);
$value = str_repeat("x", rand(1, 1000));

if (!apc_store($key, $value)) {
    var_dump("write " . $i);
}

if ($value != ($new = apc_fetch($key))) {
    var_dump("read " . $i);
}
}
echo (microtime(true)-$start).'<br />';

apc_clear_cache();

$start = microtime(true);
for ($i = 0; $i<10000; $i++) {
$key = "xxx".rand(1,1000);
$value = str_repeat("x", rand(1, 1000));

if (!apc_store($key, $value)) {
    var_dump("write " . $i);
}

if ($value != ($new = apc_fetch($key))) {
    var_dump("read " . $i);
}
}
echo (microtime(true)-$start).'<br />';

apc_clear_cache();

$start = microtime(true);
for ($i = 0; $i<10000; $i++) {
$key = "xxx".rand(1,10000);
$value = str_repeat("x", rand(1, 1000));

if (!apc_store($key, $value)) {
    var_dump("write " . $i);
}

if ($value != ($new = apc_fetch($key))) {
    var_dump("read " . $i);
}
}
echo (microtime(true)-$start).'<br />';

0.038509845733643
0.039151906967163
0.041460990905762

0.037004947662354
0.038368940353394
0.040554046630859

0.037173986434937
0.038563966751099
0.040863037109375