Online PHP editor | perf for uc11m

@ 2014-06-25T20:02:23Z

<?php

function genKey($length) {
  if($length > 0) { 
	  $rand_id="";
		for($i=1; $i <= $length; $i++) {
		 mt_srand((double)microtime() * 1000000);
		 $num = mt_rand(1,72);
		 $rand_id .= assign_rand_value($num);
		}
  }
	return $rand_id;
}

function assign_rand_value($num) {
  switch($num) {
    case "1":
     $rand_value = "a";
    break;
    case "2":
     $rand_value = "b";
    break;
    case "3":
     $rand_value = "c";
    break;
    case "4":
     $rand_value = "d";
    break;
    case "5":
     $rand_value = "e";
    break;
    case "6":
     $rand_value = "f";
    break;
    case "7":
     $rand_value = "g";
    break;
    case "8":
     $rand_value = "h";
    break;
    case "9":
     $rand_value = "i";
    break;
    case "10":
     $rand_value = "j";
    break;
    case "11":
     $rand_value = "k";
    break;
    case "12":
     $rand_value = "l";
    break;
    case "13":
     $rand_value = "m";
    break;
    case "14":
     $rand_value = "n";
    break;
    case "15":
     $rand_value = "o";
    break;
    case "16":
     $rand_value = "p";
    break;
    case "17":
     $rand_value = "q";
    break;
    case "18":
     $rand_value = "r";
    break;
    case "19":
     $rand_value = "s";
    break;
    case "20":
     $rand_value = "t";
    break;
    case "21":
     $rand_value = "u";
    break;
    case "22":
     $rand_value = "v";
    break;
    case "23":
     $rand_value = "w";
    break;
    case "24":
     $rand_value = "x";
    break;
    case "25":
     $rand_value = "y";
    break;
    case "26":
     $rand_value = "z";
    break;
    case "27":
     $rand_value = "0";
    break;
    case "28":
     $rand_value = "1";
    break;
    case "29":
     $rand_value = "2";
    break;
    case "30":
     $rand_value = "3";
    break;
    case "31":
     $rand_value = "4";
    break;
    case "32":
     $rand_value = "5";
    break;
    case "33":
     $rand_value = "6";
    break;
    case "34":
     $rand_value = "7";
    break;
    case "35":
     $rand_value = "8";
    break;
    case "36":
     $rand_value = "9";
    break;
    case "37":
     $rand_value = "*";
    break;
    case "38":
     $rand_value = "~";
    break;
    case "39":
     $rand_value = "-";
    break;
    case "40":
     $rand_value = "|";
    break;
    case "41":
     $rand_value = "^";
    break;
    case "42":
     $rand_value = "%";
    break;
    case "43":
     $rand_value = " ";
    break;
    case "44":
     $rand_value = "_";
    break;
    case "45":
     $rand_value = "+";
    break;
    case "46":
     $rand_value = "=";
    break;
    case "47":
     $rand_value = "A";
    break;
    case "48":
     $rand_value = "B";
    break;
    case "49":
     $rand_value = "C";
    break;
    case "50":
     $rand_value = "D";
    break;
    case "51":
     $rand_value = "E";
    break;
    case "52":
     $rand_value = "F";
    break;
    case "53":
     $rand_value = "G";
    break;
    case "54":
     $rand_value = "H";
    break;
    case "55":
     $rand_value = "I";
    break;
    case "56":
     $rand_value = "J";
    break;
    case "57":
     $rand_value = "K";
    break;
    case "58":
     $rand_value = "L";
    break;
    case "59":
     $rand_value = "M";
    break;
    case "60":
     $rand_value = "N";
    break;
    case "61":
     $rand_value = "O";
    break;
    case "62":
     $rand_value = "P";
    break;
    case "63":
     $rand_value = "Q";
    break;
    case "64":
     $rand_value = "R";
    break;
    case "65":
     $rand_value = "S";
    break;
    case "66":
     $rand_value = "T";
    break;
    case "67":
     $rand_value = "U";
    break;
    case "68":
     $rand_value = "V";
    break;
    case "69":
     $rand_value = "W";
    break;
    case "70":
     $rand_value = "X";
    break;
    case "71":
     $rand_value = "Y";
    break;
    case "72":
     $rand_value = "Z";
    break;
  }
return $rand_value;
}

echo genKey(10);

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)
7.2.0	0.006	0.006	19.11
7.1.7	0.000	0.010	17.28
7.1.6	0.011	0.014	19.46
7.1.5	0.003	0.013	17.12
7.1.0	0.020	0.063	22.33
7.0.20	0.000	0.009	16.79
7.0.14	0.003	0.070	22.13
7.0.10	0.003	0.087	20.00
7.0.9	0.007	0.080	19.92
7.0.8	0.010	0.073	19.93
7.0.7	0.000	0.097	19.94
7.0.6	0.003	0.087	19.84
7.0.5	0.033	0.080	20.44
7.0.4	0.013	0.083	20.19
7.0.3	0.010	0.090	20.18
7.0.2	0.007	0.097	20.02
7.0.1	0.007	0.083	20.12
7.0.0	0.007	0.083	20.10
5.6.28	0.003	0.073	20.96
5.6.25	0.010	0.080	20.62
5.6.24	0.013	0.077	20.68
5.6.23	0.003	0.087	20.61
5.6.22	0.013	0.060	20.61
5.6.21	0.013	0.060	20.66
5.6.20	0.003	0.090	21.11
5.6.19	0.013	0.073	21.02
5.6.18	0.007	0.083	21.11
5.6.17	0.007	0.087	21.09
5.6.16	0.013	0.070	21.11
5.6.15	0.007	0.083	21.14
5.6.14	0.007	0.073	21.14
5.6.13	0.007	0.083	21.09
5.6.12	0.007	0.077	21.00
5.6.11	0.007	0.080	21.01
5.6.10	0.013	0.087	21.09
5.6.9	0.010	0.090	21.00
5.6.8	0.013	0.057	20.56
5.6.7	0.010	0.077	20.44
5.6.6	0.000	0.087	20.45
5.6.5	0.017	0.057	20.43
5.6.4	0.010	0.073	20.41
5.6.3	0.030	0.057	20.42
5.6.2	0.003	0.080	20.34
5.6.1	0.013	0.077	20.55
5.6.0	0.013	0.077	20.44
5.5.38	0.003	0.080	20.37
5.5.37	0.013	0.073	20.36
5.5.36	0.010	0.080	20.39
5.5.35	0.013	0.073	20.43
5.5.34	0.013	0.067	20.98
5.5.33	0.003	0.087	20.89
5.5.32	0.000	0.097	20.95
5.5.31	0.013	0.067	20.99
5.5.30	0.003	0.057	20.84
5.5.29	0.023	0.063	20.98
5.5.28	0.010	0.080	20.89
5.5.27	0.003	0.087	20.85
5.5.26	0.003	0.090	20.96
5.5.25	0.010	0.080	20.75
5.5.24	0.020	0.063	20.33
5.5.23	0.007	0.083	20.26
5.5.22	0.000	0.087	20.04
5.5.21	0.007	0.070	20.36
5.5.20	0.007	0.077	20.33
5.5.19	0.007	0.073	20.13
5.5.18	0.007	0.080	20.21
5.5.16	0.003	0.087	20.29
5.5.15	0.010	0.070	20.30
5.5.14	0.007	0.043	20.21
5.5.13	0.013	0.070	20.28
5.5.12	0.007	0.080	20.23
5.5.11	0.007	0.083	20.18
5.5.10	0.003	0.077	20.16
5.5.9	0.013	0.057	20.03
5.5.8	0.010	0.077	20.12
5.5.7	0.017	0.067	20.20
5.5.6	0.013	0.057	20.12
5.5.5	0.007	0.077	20.06
5.5.4	0.010	0.070	20.14
5.5.3	0.013	0.073	19.99
5.5.2	0.000	0.083	20.14
5.5.1	0.010	0.077	20.09
5.5.0	0.010	0.073	20.11
5.4.45	0.013	0.077	19.46
5.4.44	0.010	0.057	19.36
5.4.43	0.007	0.040	19.45
5.4.42	0.017	0.073	19.52
5.4.41	0.003	0.077	19.08
5.4.40	0.017	0.067	19.03
5.4.39	0.017	0.063	18.95
5.4.38	0.013	0.067	19.20
5.4.37	0.013	0.070	19.03
5.4.36	0.003	0.053	18.85
5.4.35	0.010	0.073	19.13
5.4.34	0.013	0.077	19.20
5.4.32	0.003	0.080	18.85
5.4.31	0.007	0.073	19.09
5.4.30	0.007	0.053	19.23
5.4.29	0.007	0.067	19.12
5.4.28	0.013	0.067	19.12
5.4.27	0.003	0.073	19.05
5.4.26	0.010	0.073	18.85
5.4.25	0.010	0.070	19.20
5.4.24	0.007	0.077	18.95
5.4.23	0.010	0.073	19.02
5.4.22	0.013	0.067	19.02
5.4.21	0.017	0.070	19.18
5.4.20	0.003	0.077	18.89
5.4.19	0.010	0.067	18.90
5.4.18	0.010	0.060	18.87
5.4.17	0.013	0.073	19.21
5.4.16	0.007	0.060	19.04
5.4.15	0.017	0.070	19.12
5.4.14	0.007	0.070	16.50
5.4.13	0.010	0.063	16.43
5.4.12	0.010	0.067	16.34
5.4.11	0.010	0.073	16.50
5.4.10	0.003	0.083	16.46
5.4.9	0.013	0.067	16.44
5.4.8	0.003	0.077	16.48
5.4.7	0.007	0.077	16.36
5.4.6	0.013	0.063	16.52
5.4.5	0.007	0.070	16.46
5.4.4	0.007	0.067	16.29
5.4.3	0.010	0.073	16.45
5.4.2	0.007	0.060	16.46
5.4.1	0.007	0.063	16.52
5.4.0	0.017	0.050	15.78
5.3.29	0.007	0.067	14.84
5.3.28	0.010	0.070	14.69
5.3.27	0.007	0.080	14.68
5.3.26	0.003	0.070	14.71
5.3.25	0.010	0.067	14.62
5.3.24	0.010	0.067	14.61
5.3.23	0.003	0.080	14.62
5.3.22	0.003	0.073	14.74
5.3.21	0.010	0.073	14.64
5.3.20	0.013	0.043	14.58
5.3.19	0.010	0.073	14.57
5.3.18	0.007	0.077	14.72
5.3.17	0.010	0.073	14.58
5.3.16	0.007	0.057	14.53
5.3.15	0.003	0.077	14.67
5.3.14	0.010	0.077	14.66
5.3.13	0.007	0.083	14.65
5.3.12	0.017	0.070	14.70
5.3.11	0.013	0.077	14.73
5.3.10	0.020	0.067	14.07
5.3.9	0.010	0.073	14.18
5.3.8	0.010	0.070	13.96
5.3.7	0.010	0.087	13.99
5.3.6	0.000	0.070	14.11
5.3.5	0.003	0.050	14.05
5.3.4	0.003	0.040	14.10
5.3.3	0.003	0.070	13.88
5.3.2	0.003	0.073	13.88
5.3.1	0.003	0.040	13.68
5.3.0	0.003	0.030	13.70

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