Online PHP editor | perf for DkmmI

@ 2018-08-20T21:00:12Z

<?php

$my_secret = sodium_hex2bin("da93b1db433cfb2efe490a1bb263e440b586b6167c20b86f14cd058515806940");
$my_public = sodium_crypto_scalarmult_base($my_secret);

$scott_secret = random_bytes(32);
$scott_public = sodium_crypto_scalarmult_base($scott_secret);

$my_shared_with_scott = sodium_crypto_scalarmult($my_secret, $scott_public);
$scott_shared_with_me = sodium_crypto_scalarmult($scott_secret, $my_public);

echo 'An attacker can only see: ', PHP_EOL;
var_dump([
    'my public' =>
        sodium_bin2hex($my_public),
    'scott public' =>
        sodium_bin2hex($scott_public)
]);

echo 'Together, we calculated a shared secret for encryption: ', PHP_EOL;
var_dump([
    'I see' =>
        sodium_bin2hex($my_shared_with_scott),
    'Scott sees' =>
        sodium_bin2hex($scott_shared_with_me)
]);

Here you find the average performance (time & memory) of each version. A grayed out version indicates it didn't complete successfully (based on exit-code).

Version	System time (s)	User time (s)	Memory (MiB)
7.2.9	0.350	0.010	14.70
7.2.8	0.273	0.003	14.37
7.2.7	0.404	0.010	14.77
7.2.6	0.259	0.007	14.93
7.2.5	0.271	0.003	15.24
7.2.4	0.255	0.000	15.30
7.2.3	0.203	0.010	15.24
7.2.2	0.166	0.013	14.86
7.2.1	0.144	0.007	14.91
7.2.0	0.010	0.010	14.99
7.1.21	0.536	0.007	13.77
7.1.20	0.282	0.006	13.77
7.1.19	0.271	0.000	13.54
7.1.18	0.225	0.003	13.66
7.1.17	0.249	0.007	13.47
7.1.16	0.224	0.007	13.58
7.1.15	0.237	0.007	13.79
7.1.14	0.153	0.007	13.46
7.1.13	0.024	0.014	13.56
7.1.12	0.013	0.010	13.76
7.1.11	0.129	0.007	13.89
7.1.10	0.162	0.007	13.67
7.1.9	0.200	0.007	13.70
7.1.8	0.236	0.010	13.80
7.1.7	0.230	0.007	13.28
7.1.6	0.262	0.010	32.02
7.1.5	0.368	0.010	31.86
7.1.4	0.420	0.010	31.68
7.1.3	0.021	0.017	31.59
7.1.2	0.096	0.017	31.63
7.1.1	0.155	0.006	13.40
7.1.0	0.113	0.010	13.76

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