Online PHP editor | perf for YVgdl

@ 2020-09-23T22:38:04Z

<?php  //bk2020 cc0

// SipHash-2-4
// Aumasson and Bernstein 2012, https://131002.net/siphash/
// https://github.com/jedisct1/libsodium/tree/master/src/libsodium/crypto_shorthash
// https://github.com/php/php-src/tree/master/ext/sodium/libsodium.c#L472

function bytes_as_hex(&$str, $len=null) {
  if( !$len )  { $len = strlen($str); }

  // zero-based array index for unpack, kennwhite 2005:
  // https://www.php.net/manual/en/function.unpack.php#45188
  $arrhead = array_merge( unpack('C*', substr($str,0,$len)) );

  return array_reduce( $arrhead, function($a,$b) {
           return ($b>15) ? $a.dechex($b) : $a.'0'.dechex($b);
         }, '' );
}

$SIPHASH = null;
if( function_exists('\sodium_crypto_shorthash') ) {
  $SIPHASH = 'sodium_crypto_shorthash';
}
else if( function_exists('\Sodium\crypto_shorthash') ) {
  $SIPHASH = '\Sodium\crypto_shorthash';
}
else {
  die('Unable to test SipHash-2-4 using sodium_crypto_shorthash');
}

$SIPKEY = '1234567890abcdef';  // 16-byte key for SipHash-2-4

echo '# ', $SIPHASH, PHP_EOL;

// thanks to: https://3v4l.org/EsGSU
// (note: bin2hex won't print leading zero on byte values <16)
for ($i = 0; $i < 256; ++$i) {
  $msg = bin2hex( chr(($i & 0x3F) | 0x80) );  
  $aref = hrtime();
  $hsh = $SIPHASH( $msg, $SIPKEY );
  $anow = hrtime();
  echo $i, "\t", bytes_as_hex($hsh,8), print_r($aref,true), print_r($anow,true), PHP_EOL;
}

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)
8.3.6	0.016	0.013	18.30
8.3.5	0.004	0.014	18.21
8.3.4	0.011	0.007	20.29
8.3.3	0.016	0.003	18.63
8.3.2	0.006	0.003	24.18
8.3.1	0.003	0.006	24.66
8.3.0	0.007	0.003	26.16
8.2.18	0.009	0.012	25.92
8.2.17	0.008	0.011	18.75
8.2.16	0.015	0.003	22.96
8.2.15	0.006	0.003	25.66
8.2.14	0.006	0.003	24.66
8.2.13	0.009	0.000	26.16
8.2.12	0.006	0.003	21.03
8.2.11	0.004	0.007	19.12
8.1.28	0.012	0.006	25.92
8.1.27	0.008	0.004	24.02
8.1.26	0.007	0.011	26.35
8.1.25	0.004	0.004	28.09
8.1.24	0.004	0.007	19.13
7.4.10	0.016	0.013	16.41
7.4.9	0.014	0.022	16.33
7.4.8	0.021	0.015	16.44
7.4.7	0.026	0.004	16.18
7.4.6	0.017	0.020	16.32
7.4.5	0.022	0.020	16.26
7.4.4	0.010	0.018	16.21
7.4.3	0.015	0.015	16.36
7.4.2	0.024	0.009	16.51
7.4.1	0.024	0.010	16.28
7.4.0	0.013	0.017	16.50
7.3.22	0.017	0.014	16.41
7.3.21	0.014	0.018	16.28
7.3.20	0.021	0.015	16.40
7.3.19	0.003	0.031	16.39
7.3.18	0.012	0.023	16.35
7.3.17	0.018	0.015	16.18
7.3.16	0.021	0.009	16.52
7.3.15	0.019	0.012	16.22
7.3.14	0.017	0.014	16.30
7.3.13	0.014	0.018	16.42
7.3.12	0.021	0.010	16.49
7.3.11	0.023	0.006	16.18
7.3.10	0.012	0.015	16.36
7.3.9	0.017	0.013	16.44
7.3.8	0.017	0.013	16.50
7.3.7	0.014	0.014	16.20
7.3.6	0.009	0.016	16.25
7.3.5	0.014	0.011	16.23
7.2.33	0.011	0.017	16.52
7.2.32	0.014	0.009	16.76
7.2.31	0.013	0.010	16.27
7.2.30	0.013	0.009	16.42
7.2.29	0.010	0.013	16.53
7.2.28	0.016	0.003	16.47
7.2.27	0.019	0.004	16.57
7.2.26	0.020	0.003	16.29
7.2.25	0.007	0.018	16.25
7.2.24	0.016	0.006	16.19
7.2.23	0.008	0.013	16.46
7.2.22	0.010	0.010	16.32
7.2.21	0.008	0.012	16.31
7.2.20	0.011	0.008	16.42
7.2.19	0.012	0.008	16.27

preferences:dark modelive preview