Description:
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When I use any OpenSSL encryption/decryption function (like openssl_seal, openssl_open, openssl_public_encrypt, openssl_private_decrypt, etc.) it takes very long time to execute, when it has been called in a first time. After that other function calls performs very fast in the same script.

Reproduce code:
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$btime = microtime(true);
openssl_seal('Some information', $sealed, $ekeys, array(openssl_get_publickey('file://C:\512.pub')));
echo 'Time:  '.(microtime(true) - $btime);
$btime = microtime(true);
openssl_seal('Some information', $sealed, $ekeys, array(openssl_get_publickey('file://C:\1024.pub')));
echo '<br>Time:  '.(microtime(true) - $btime);

Expected result:
----------------
Time: 0.00************
Time: 0.00075888633728

Actual result:
--------------
Time: 0.969028949738
Time: 0.00075888633728