3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var = "12345"; $time_start = microtime(true); echo $var[0] . "-" . substr($var,1); $time_end = microtime(true); echo "\nExecution Time: " . $time_end - $time_start; $time_start = microtime(true); echo str_replace($var[0], $var[0].'-', $var); $time_end = microtime(true); echo "\nExecution Time: " . $time_end - $time_start;

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).

VersionSystem time (s)User time (s)Memory (MiB)
7.4.00.0040.01215.07
7.3.120.0100.01014.98
7.3.110.0030.01414.84
7.3.100.0070.00314.81
7.3.90.0000.01714.98
7.3.80.0070.00714.93
7.3.70.0060.00614.74
7.3.60.0040.00814.56
7.3.50.0030.01015.05
7.3.40.0030.00914.80
7.3.30.0090.00614.95
7.3.20.0060.00916.72
7.3.10.0030.01016.68
7.3.00.0040.00716.73
7.2.250.0090.00914.98
7.2.240.0090.00315.10
7.2.230.0040.00715.07
7.2.220.0030.01115.24
7.2.210.0040.01215.13
7.2.200.0040.01215.25
7.2.190.0000.01514.96
7.2.180.0070.00315.26
7.2.170.0030.01014.90
7.2.00.0000.01219.29
7.1.330.0070.01015.98
7.1.320.0000.01215.87
7.1.310.0030.01115.94
7.1.300.0070.00715.86
7.1.290.0030.00915.60
7.1.280.0050.00915.77
7.1.270.0070.00715.55
7.1.260.0060.00615.73
7.1.70.0000.00817.26
7.1.60.0000.01317.33
7.1.50.0040.01516.70
7.1.00.0100.07022.54
7.0.200.0030.01416.88
7.0.140.0070.07021.90
7.0.80.0270.07020.02
7.0.70.0500.05719.92
7.0.60.0600.07019.86
7.0.50.0630.07720.38
7.0.40.0100.07720.14
7.0.30.0030.04319.95
7.0.20.0030.08720.04
7.0.10.0070.08720.04
7.0.00.0070.08020.07
5.6.280.0030.07321.11
5.6.230.0070.06320.59
5.6.220.0000.08720.73
5.6.210.0100.08020.68
5.6.200.0130.08321.17
5.6.190.0070.08021.03
5.6.180.0200.07021.02
5.6.170.0000.08321.02
5.6.160.0100.08721.04
5.6.150.0030.08721.11
5.6.140.0130.08320.95
5.6.130.0070.08721.07
5.6.120.0170.08021.04
5.6.110.0100.08321.06
5.6.100.0070.07721.06
5.6.90.0200.06720.94
5.6.80.0070.05020.51
5.6.70.0100.08020.35
5.6.60.0130.04720.32
5.6.50.0130.07720.48
5.6.40.0030.08020.52
5.6.30.0130.07320.37
5.6.20.0100.07020.43
5.6.10.0070.08020.32
5.6.00.0070.06320.39
5.5.370.0070.04320.41
5.5.360.0100.07720.33
5.5.350.0130.07020.36
5.5.340.0100.08320.88
5.5.330.0000.09020.80
5.5.320.0070.08020.77
5.5.310.0130.07320.79
5.5.300.0230.07320.91
5.5.290.0070.08320.87
5.5.280.0100.07020.80
5.5.270.0070.05020.63
5.5.260.0130.08020.59
5.5.250.0070.07320.68
5.5.240.0170.07020.27
5.5.230.0070.07020.20
5.5.220.0100.07020.25
5.5.210.0170.05720.15
5.5.200.0130.07020.21
5.5.190.0170.06020.24
5.5.180.0130.05020.14
5.5.160.0130.07319.99
5.5.150.0130.06720.07
5.5.140.0130.06720.18
5.5.130.0170.06320.11
5.5.120.0000.08020.16
5.5.110.0130.05719.98
5.5.100.0100.05720.07
5.5.90.0070.08020.16
5.5.80.0070.07720.12
5.5.70.0100.07020.10
5.5.60.0070.08019.93
5.5.50.0130.07020.02
5.5.40.0200.06320.09
5.5.30.0100.04320.02
5.5.20.0030.05320.13
5.5.10.0070.05319.95
5.5.00.0130.07019.95
5.4.450.0030.08719.13
5.4.440.0130.07719.29
5.4.430.0100.07319.37
5.4.420.0100.04019.27
5.4.410.0070.07719.01
5.4.400.0070.07319.11
5.4.390.0130.07719.23
5.4.380.0100.07719.07
5.4.370.0030.08318.91
5.4.360.0100.07319.05
5.4.350.0230.06019.06
5.4.340.0100.07018.90
5.4.320.0070.08018.95
5.4.310.0100.07319.04
5.4.300.0170.06319.03
5.4.290.0030.08018.80
5.4.280.0170.05018.95
5.4.270.0130.03719.12
5.4.260.0130.06718.89
5.4.250.0100.04318.97
5.4.240.0030.06718.95
5.4.230.0100.05719.02
5.4.220.0130.05319.11
5.4.210.0170.07019.14
5.4.200.0100.04719.11
5.4.190.0100.06018.96
5.4.180.0070.07019.05
5.4.170.0030.08019.01
5.4.160.0070.07719.21
5.4.150.0270.06318.88
5.4.140.0100.06316.30
5.4.130.0130.06716.36
5.4.120.0000.04316.34
5.4.110.0100.06316.38
5.4.100.0100.05016.34
5.4.90.0070.04716.21
5.4.80.0030.05316.42
5.4.70.0030.05016.29
5.4.60.0100.03316.31
5.4.50.0130.05316.45
5.4.40.0000.07316.26
5.4.30.0130.05016.18
5.4.20.0170.04716.30
5.4.10.0070.07316.31
5.4.00.0100.06715.77
5.3.290.0100.06014.65
5.3.280.0000.07714.45
5.3.270.0030.07714.56
5.3.260.0100.07014.59
5.3.250.0070.06314.61
5.3.240.0030.04014.57
5.3.230.0030.04714.61
5.3.220.0030.05014.43
5.3.210.0070.07014.57
5.3.200.0170.06314.47
5.3.190.0100.06014.57
5.3.180.0130.04714.57
5.3.170.0100.07714.50
5.3.160.0070.08014.42
5.3.150.0070.06714.51
5.3.140.0030.07014.39
5.3.130.0100.07014.55
5.3.120.0070.08314.54
5.3.110.0070.07314.54
5.3.100.0070.05313.97
5.3.90.0000.04013.95
5.3.80.0100.03713.93
5.3.70.0070.06713.92
5.3.60.0130.07013.83
5.3.50.0000.07713.93
5.3.40.0030.07313.92
5.3.30.0030.04313.87
5.3.20.0100.06713.68
5.3.10.0070.07013.52
5.3.00.0100.03013.64
5.2.170.0000.04711.81
5.2.160.0000.05311.81
5.2.150.0030.05311.81
5.2.140.0030.06311.81
5.2.130.0030.05711.81
5.2.120.0030.06711.81
5.2.110.0100.04711.81
5.2.100.0000.03011.81
5.2.90.0070.04711.81
5.2.80.0000.04311.81
5.2.70.0030.03011.81
5.2.60.0070.06011.81
5.2.50.0100.06011.81
5.2.40.0070.06011.81
5.2.30.0030.05711.81
5.2.20.0030.04311.81
5.2.10.0070.06011.81
5.2.00.0070.04011.81
5.1.60.0000.04011.81
5.1.50.0030.04711.81
5.1.40.0000.06011.81
5.1.30.0070.05311.81
5.1.20.0030.05011.81
5.1.10.0130.05011.81
5.1.00.0070.05311.81
5.0.50.0070.04011.81
5.0.40.0100.03711.81
5.0.30.0000.06311.81
5.0.20.0100.03311.81
5.0.10.0030.03311.81
5.0.00.0000.06311.81
4.4.90.0000.03711.81
4.4.80.0030.03011.81
4.4.70.0000.02011.81
4.4.60.0030.02711.81
4.4.50.0070.03011.81
4.4.40.0000.05711.81
4.4.30.0000.02711.81
4.4.20.0030.02011.81
4.4.10.0000.03711.81
4.4.00.0000.05311.81
4.3.110.0000.03311.81
4.3.100.0070.03011.81
4.3.90.0000.03711.81
4.3.80.0000.03711.81
4.3.70.0000.03011.81
4.3.60.0070.03011.81
4.3.50.0000.03711.81
4.3.40.0000.05311.81
4.3.30.0030.03011.81
4.3.20.0000.02311.81
4.3.10.0030.03311.81
4.3.00.0030.03311.81

preferences:
38.61 ms | 401 KiB | 5 Q