Online PHP editor | perf for E7cb5

<?php /** * Random_* Compatibility Library * for using the new PHP 7 random_* API in PHP 5 projects * * The MIT License (MIT) * * Copyright (c) 2015 Paragon Initiative Enterprises * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ if (!function_exists('random_int')) { /** * Fetch a random integer between $min and $max inclusive * * @param int $min * @param int $max * * @throws Exception * * @return int */ function random_int($min, $max) { /** * Type and input logic checks */ if (!is_int($min)) { throw new Exception( 'random_int(): $min must be an integer' ); } if (!is_int($max)) { throw new Exception( 'random_int(): $max must be an integer' ); } if ($min > $max) { throw new Exception( 'Minimum value must be less than or equal to the maximum value' ); } if ($max === $min) { return $min; } /** * Initialize variables to 0 * * We want to store: * $bytes => the number of random bytes we need * $mask => an integer bitmask (for use with the &) operator * so we can minimize the number of discards */ $attempts = $bits = $bytes = $mask = $valueShift = 0; /** * At this point, $range is a positive number greater than 0. It might * overflow, however, if $max - $min > PHP_INT_MAX. PHP will cast it to * a float and we will lose some precision. */ $range = $max - $min; /** * Test for integer overflow: */ if (!is_int($range)) { /** * Still safely calculate wider ranges. * Provided by @CodesInChaos, @oittaa * * @ref https://gist.github.com/CodesInChaos/03f9ea0b58e8b2b8d435 * * We use ~0 as a mask in this case because it generates all 1s * * @ref https://eval.in/400356 (32-bit) * @ref http://3v4l.org/XX9r5 (64-bit) */ $bytes = PHP_INT_SIZE; $mask = ~0; } else { /** * $bits is effectively ceil(log($range, 2)) without dealing with * type juggling */ while ($range > 0) { if ($bits % 8 === 0) { ++$bytes; } ++$bits; $range >>= 1; $mask = $mask << 1 | 1; } $valueShift = $min; } /** * Now that we have our parameters set up, let's begin generating * random integers until one falls between $min and $max */ do { /** * The rejection probability is at most 0.5, so this corresponds * to a failure probability of 2^-128 for a working RNG */ if ($attempts > 128) { throw new Exception( 'random_int: RNG is broken - too many rejections' ); } /** * Let's grab the necessary number of random bytes */ $randomByteString = mcrypt_create_iv($bytes, MCRYPT_DEV_URANDOM); if ($randomByteString === false) { throw new Exception( 'Random number generator failure' ); } /** * Let's turn $randomByteString into an integer * * This uses bitwise operators (<< and |) to build an integer * out of the values extracted from ord() * * Example: [9F] | [6D] | [32] | [0C] => * 159 + 27904 + 3276800 + 201326592 => * 204631455 */ $val = 0; for ($i = 0; $i < $bytes; ++$i) { $val |= ord($randomByteString[$i]) << ($i * 8); } /** * Apply mask */ $val &= $mask; $val += $valueShift; ++$attempts; /** * If $val overflows to a floating point number, * ... or is larger than $max, * ... or smaller than $int, * then try again. */ } while (!is_int($val) || $val > $max || $val < $min); return (int) $val; } } function random_unique_select($num, array $possible_values) { $sizeof = count($possible_values); if ($num > $sizeof) { throw new InvalidArgumentException('$num is too large'); } $selected = []; for ($i = 0; $i < $num; ++$i) { // Grab a random int [0, ... N - 1] $r = random_int(0, $sizeof - 1); // Copy the selected value into $selected $selected[] = $possible_values[$r]; // Delete it from the range of possible values unset($possible_values[$r]); // N has grown smaller by 1 --$sizeof; // Reset keys; we want this to be zero-indexed. $possible_values = array_values($possible_values); } return $selected; } $results = []; for ($i = 0; $i < 100000; ++$i) { $lottery = json_encode(random_unique_select(6, range(1,29))); if (isset($results[$lottery])) { $results[$lottery]++; } else { $results[$lottery] = 1; } } var_dump($results);

Version	System time (s)	User time (s)	Memory (MiB)
8.3.9	0.330	0.194	26.77
8.3.8	0.392	0.138	26.77
8.3.7	0.365	0.133	26.77
8.3.6	0.315	0.172	26.77
8.3.5	0.373	0.130	26.77
8.3.4	0.347	0.167	26.77
8.3.3	0.371	0.147	26.77
8.3.2	0.341	0.159	26.77
8.3.1	0.339	0.132	26.77
8.3.0	0.360	0.147	26.77
8.2.21	0.322	0.143	27.08
8.2.20	0.329	0.140	26.77
8.2.19	0.310	0.162	26.77
8.2.18	0.334	0.137	26.77
8.2.17	0.321	0.149	26.77
8.2.16	0.363	0.143	26.77
8.2.15	0.328	0.181	26.77
8.2.14	0.359	0.151	26.77
8.2.13	0.281	0.191	26.77
8.2.12	0.312	0.179	26.77
8.2.11	0.355	0.131	26.77
8.2.10	0.308	0.163	26.77
8.2.9	0.332	0.171	26.77
8.2.8	0.352	0.132	26.77
8.2.7	0.360	0.154	26.77
8.2.6	0.318	0.162	26.77
8.2.5	0.353	0.159	26.77
7.4.6	0.909	0.906	45.09
7.4.5	1.021	1.003	44.89
7.4.4	1.064	1.047	44.92
7.4.3	0.902	0.951	45.09
7.3.18	0.919	0.968	44.81
7.3.17	1.093	1.101	44.92
7.3.16	1.044	1.009	45.16
7.3.15	1.045	1.230	42.48
7.3.1	0.902	0.373	44.73
7.3.0	1.056	0.301	44.14
7.2.31	1.023	1.133	44.53
7.2.30	1.020	0.972	44.73
7.2.29	1.073	1.205	44.75
7.2.13	0.855	0.295	45.02
7.2.12	0.812	0.431	44.95
7.2.11	0.868	0.316	44.91
7.2.10	0.832	0.330	44.92
7.2.9	0.773	0.294	45.04
7.2.8	0.877	0.381	44.70
7.2.7	0.914	0.356	45.08
7.2.6	0.802	0.399	44.75
7.2.5	0.713	0.333	45.04
7.2.4	0.787	0.372	44.96
7.2.3	0.800	0.318	45.06
7.2.2	0.834	0.355	44.74
7.2.1	0.900	0.347	44.72
7.2.0	0.698	0.276	46.22
7.1.25	0.835	0.470	43.78
7.1.7	0.216	0.259	45.18
7.1.6	0.409	0.259	45.44
7.1.5	0.391	0.288	62.68
7.1.0	0.367	0.310	50.24
7.0.20	1.315	0.240	43.04
7.0.9	1.550	0.287	47.93
7.0.8	1.290	0.310	47.95
7.0.7	1.410	0.220	48.03
7.0.6	1.430	0.237	47.93
7.0.5	0.873	0.360	48.44
7.0.4	0.967	0.383	24.26
7.0.3	1.023	0.293	24.22
7.0.2	0.927	0.347	24.19
7.0.1	1.080	0.317	24.11
7.0.0	1.040	0.317	24.16
5.6.28	0.007	0.060	20.80
5.6.24	0.003	0.087	20.75
5.6.23	0.007	0.033	20.58
5.6.22	0.013	0.073	20.69
5.6.21	0.013	0.073	20.48
5.6.20	1.073	1.427	35.97
5.6.19	1.037	1.463	35.81
5.6.18	1.007	1.493	35.81
5.6.17	1.023	1.477	36.23
5.6.16	1.007	1.493	35.55
5.6.15	0.977	1.523	36.26
5.6.14	0.913	1.587	34.38
5.6.13	1.013	1.487	35.78
5.6.12	1.053	1.407	34.77
5.6.11	1.037	1.463	36.25
5.6.10	1.043	1.457	35.71
5.6.9	1.330	1.147	33.00
5.6.8	1.123	1.343	30.54
5.6.7	1.170	1.280	29.70
5.6.6	1.170	1.297	32.68
5.6.5	1.243	1.180	30.32
5.6.4	1.267	1.183	31.00
5.6.3	1.237	1.230	30.70
5.6.2	1.257	1.220	30.41
5.6.1	1.167	1.310	29.94
5.6.0	1.293	1.183	30.78
5.5.38	0.010	0.070	20.43
5.5.37	0.007	0.030	20.56
5.5.36	0.010	0.043	20.35
5.5.35	0.010	0.050	20.49
5.5.34	0.960	1.530	32.76
5.5.33	0.983	1.517	35.48
5.5.32	1.057	1.443	36.33
5.5.31	0.963	1.537	35.54
5.5.30	0.983	1.517	33.96
5.5.29	1.020	1.470	36.22
5.5.28	1.180	1.317	34.27
5.5.27	1.033	1.453	35.00
5.5.26	1.107	1.393	35.09
5.5.25	1.187	1.290	30.23
5.5.24	1.233	1.247	30.36
5.5.23	1.230	1.233	31.26
5.5.22	1.200	1.277	31.85
5.5.21	1.203	1.273	31.25
5.5.20	1.313	1.167	30.14
5.5.19	1.133	1.333	29.41
5.5.18	1.203	1.273	29.75
5.5.16	1.173	1.303	29.51
5.5.15	1.163	1.313	30.15
5.5.14	1.273	1.193	29.53
5.5.13	1.353	1.097	31.94
5.5.12	1.220	1.260	29.77
5.5.11	1.140	1.340	28.84
5.5.10	1.183	1.293	30.16
5.5.9	1.340	1.140	29.02
5.5.8	1.210	1.267	30.11
5.5.7	1.190	1.267	29.80
5.5.6	1.183	1.297	31.28
5.5.5	1.213	1.260	30.53
5.5.4	1.287	1.190	29.51
5.5.3	1.257	1.220	29.98
5.5.2	1.147	1.327	30.41
5.5.1	1.160	1.307	31.51
5.5.0	1.270	1.183	31.52
5.4.45	1.237	1.243	28.70
5.4.44	1.173	1.303	29.91
5.4.43	1.270	1.207	29.14
5.4.42	1.230	1.247	28.35
5.4.41	1.247	1.230	30.53
5.4.40	1.150	1.327	29.38
5.4.39	1.237	1.227	30.42
5.4.38	1.120	1.347	30.36
5.4.37	1.193	1.287	28.25
5.4.36	1.257	1.223	28.78
5.4.35	1.240	1.237	28.60
5.4.34	1.190	1.287	30.08
5.4.32	1.210	1.260	29.12
5.4.31	1.230	1.243	30.42
5.4.30	1.180	1.297	28.00
5.4.29	1.180	1.283	30.95
5.4.28	1.257	1.217	31.23
5.4.27	1.113	1.367	27.33
5.4.26	1.287	1.190	28.59
5.4.25	1.330	1.147	29.23
5.4.24	1.117	1.360	28.73
5.4.23	1.183	1.287	30.44
5.4.22	1.220	1.247	28.41
5.4.21	1.230	1.247	28.77
5.4.20	1.260	1.217	29.74
5.4.19	1.247	1.223	30.48
5.4.18	1.047	1.420	29.25
5.4.17	1.213	1.250	30.70
5.4.16	1.317	1.160	28.98
5.4.15	1.217	1.260	28.74
5.4.14	1.157	1.290	25.61
5.4.13	1.190	1.287	25.35
5.4.12	1.273	1.200	26.43
5.4.11	1.323	1.150	26.52
5.4.10	1.223	1.250	25.89
5.4.9	1.173	1.303	26.20
5.4.8	1.163	1.313	25.72
5.4.7	1.243	1.230	26.69
5.4.6	1.207	1.270	25.23
5.4.5	1.223	1.253	26.18
5.4.4	1.190	1.287	28.09
5.4.3	1.303	1.173	26.47
5.4.2	1.260	1.217	26.17
5.4.1	1.167	1.313	25.04
5.4.0	1.323	1.153	25.75

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