3v4l.org

run code in 300+ PHP versions simultaneously
<?php $prázdnyReťazec = ""; var_dump(isset($prázdnyReťazec)); // ...

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)
8.3.60.0100.01016.63
8.3.50.0120.00722.85
8.3.40.0110.00318.59
8.3.30.0100.00319.06
8.3.20.0070.00020.16
8.3.10.0030.00620.36
8.3.00.0040.00420.83
8.2.180.0140.00325.92
8.2.170.0070.01018.82
8.2.160.0070.01022.96
8.2.150.0040.00425.66
8.2.140.0050.00324.66
8.2.130.0040.00426.16
8.2.120.0040.00420.76
8.2.110.0040.00722.00
8.2.100.0080.00317.78
8.2.90.0030.00517.50
8.2.80.0030.00517.97
8.2.70.0050.00317.80
8.2.60.0050.00517.93
8.2.50.0060.00318.07
8.2.40.0080.00318.16
8.2.30.0050.00319.47
8.2.20.0040.00417.61
8.2.10.0070.00018.04
8.2.00.0000.00817.45
8.1.280.0070.00725.92
8.1.270.0060.00323.71
8.1.260.0060.00326.35
8.1.250.0050.00328.09
8.1.240.0040.00422.09
8.1.230.0120.00019.16
8.1.220.0030.00617.74
8.1.210.0000.00818.77
8.1.200.0080.00017.35
8.1.190.0040.00817.23
8.1.180.0080.00018.10
8.1.170.0050.00218.52
8.1.160.0000.00718.80
8.1.150.0020.00518.77
8.1.140.0040.00417.28
8.1.130.0030.00317.73
8.1.120.0040.00417.38
8.1.110.0000.00817.42
8.1.100.0000.00817.41
8.1.90.0070.00317.45
8.1.80.0040.00417.32
8.1.70.0070.00017.18
8.1.60.0060.00317.50
8.1.50.0070.00317.47
8.1.40.0060.00617.43
8.1.30.0030.00517.54
8.1.20.0000.00817.49
8.1.10.0000.00717.30
8.1.00.0000.00817.32
8.0.300.0040.00419.73
8.0.290.0000.00916.63
8.0.280.0030.00318.27
8.0.270.0030.00317.19
8.0.260.0060.00317.06
8.0.250.0030.00316.75
8.0.240.0000.00716.85
8.0.230.0030.00316.85
8.0.220.0000.00716.74
8.0.210.0000.00716.71
8.0.200.0060.00316.76
8.0.190.0040.00416.91
8.0.180.0040.00416.72
8.0.170.0030.00516.83
8.0.160.0080.00016.84
8.0.150.0040.00416.65
8.0.140.0000.00816.75
8.0.130.0030.00313.33
8.0.120.0000.00816.83
8.0.110.0000.00716.73
8.0.100.0030.00316.77
8.0.90.0080.00016.68
8.0.80.0100.00616.76
8.0.70.0000.00716.69
8.0.60.0040.00416.64
8.0.50.0030.00516.80
8.0.30.0100.01017.00
8.0.20.0110.00917.40
8.0.10.0050.00317.05
8.0.00.0060.01216.56
7.4.330.0050.00015.02
7.4.320.0000.00716.35
7.4.300.0000.00716.37
7.4.290.0000.00716.45
7.4.280.0040.00416.56
7.4.270.0030.00316.38
7.4.260.0030.00316.43
7.4.250.0000.00716.29
7.4.240.0030.00516.42
7.4.230.0030.00316.51
7.4.220.0130.01516.48
7.4.210.0030.01216.47
7.4.200.0050.00216.23
7.4.160.0140.00716.40
7.4.150.0120.00617.40
7.4.140.0100.01017.86
7.4.130.0050.01216.51
7.4.120.0100.00816.47
7.4.110.0030.02016.50
7.4.100.0080.00816.23
7.4.90.0090.00816.54
7.4.80.0030.02219.39
7.4.70.0120.00816.43
7.4.60.0100.00616.41
7.4.50.0030.00616.11
7.4.40.0110.00716.46
7.4.30.0090.01216.31
7.4.00.0070.01014.65
7.3.330.0060.00013.07
7.3.320.0000.00513.09
7.3.310.0030.00316.06
7.3.300.0000.00716.11
7.3.290.0070.00816.14
7.3.280.0070.01016.17
7.3.270.0080.00817.40
7.3.260.0130.00316.16
7.3.250.0130.00516.34
7.3.240.0090.00816.14
7.3.230.0210.00016.39
7.3.210.0130.00316.34
7.3.200.0130.00619.39
7.3.190.0060.01216.43
7.3.180.0070.01016.43
7.3.170.0030.01216.38
7.3.160.0060.00916.14
7.3.120.0070.01014.70
7.3.110.0060.00314.47
7.3.100.0030.01014.64
7.3.90.0070.00714.62
7.3.80.0000.01114.95
7.3.70.0030.00614.66
7.3.60.0100.00314.80
7.3.50.0000.00814.88
7.3.40.0040.01114.66
7.3.30.0120.00014.84
7.3.20.0060.00616.52
7.3.10.0110.00316.43
7.3.00.0070.00716.28
7.2.330.0090.01116.39
7.2.320.0050.01116.63
7.2.310.0110.01316.20
7.2.300.0120.00416.32
7.2.290.0030.01416.49
7.2.250.0090.00614.53
7.2.240.0090.00614.93
7.2.230.0060.00615.13
7.2.220.0000.01314.82
7.2.210.0030.01114.99
7.2.200.0130.00014.74
7.2.190.0030.01014.98
7.2.180.0060.00314.76
7.2.170.0070.01014.53
7.2.60.0030.00716.61
7.2.00.0040.00819.27
7.1.330.0030.01015.57
7.1.320.0030.01015.70
7.1.310.0040.00815.72
7.1.300.0070.00715.81
7.1.290.0040.01115.69
7.1.280.0070.00715.63
7.1.270.0030.00715.83
7.1.260.0030.00915.35
7.1.200.0150.00015.57
7.1.100.0040.01218.05
7.1.70.0040.00417.19
7.1.60.0070.01819.34
7.1.50.0100.01416.59
7.1.00.0030.07322.51
7.0.200.0030.00316.69
7.0.140.0070.07322.09
7.0.100.0000.07720.00
7.0.90.0070.08019.85
7.0.80.0170.03719.91
7.0.70.0200.04319.94
7.0.60.0300.06719.95
7.0.50.0130.07720.33
7.0.40.0100.08320.11
7.0.30.0030.04320.04
7.0.20.0100.04320.13
7.0.10.0100.04020.13
7.0.00.0130.07720.08
5.6.280.0030.07321.12
5.6.250.0070.04020.61
5.6.240.0100.07320.75
5.6.230.0070.07020.50
5.6.220.0070.08020.58
5.6.210.0030.04320.43
5.6.200.0130.08021.03
5.6.190.0070.07021.03
5.6.180.0100.07720.96
5.6.170.0030.09021.05
5.6.160.0130.05321.17
5.6.150.0030.08721.07
5.6.140.0100.07720.99
5.6.130.0100.04721.00
5.6.120.0100.07721.01
5.6.110.0100.08321.12
5.6.100.0000.10021.02
5.6.90.0130.05721.00
5.6.80.0030.06020.43
5.6.70.0070.05320.47
5.6.60.0070.08320.38
5.6.50.0070.08020.45
5.6.40.0130.07020.49
5.6.30.0070.04320.42
5.6.20.0100.06020.38
5.6.10.0130.07720.52
5.6.00.0070.05720.24
5.5.380.0000.05020.41
5.5.370.0030.05720.44
5.5.360.0030.05320.43
5.5.350.0000.08020.36
5.5.340.0030.04020.77
5.5.330.0070.03720.83
5.5.320.0170.07320.82
5.5.310.0030.09020.91
5.5.300.0130.07720.88
5.5.290.0130.07020.63
5.5.280.0030.04020.75
5.5.270.0070.07720.86
5.5.260.0030.07320.85
5.5.250.0070.08020.56
5.5.240.0130.06320.18
5.5.230.0070.08320.10
5.5.220.0070.04320.23
5.5.210.0100.07720.20
5.5.200.0130.07020.24
5.5.190.0000.05020.12
5.5.180.0130.07020.21
5.5.160.0030.05020.18
5.5.150.0070.04320.10
5.5.140.0070.04720.12
5.5.130.0100.03320.23
5.5.120.0030.04320.14
5.5.110.0030.03720.22
5.5.100.0000.04320.15
5.5.90.0000.04020.05
5.5.80.0030.04020.06
5.5.70.0070.03320.14
5.5.60.0000.07320.13
5.5.50.0070.03320.05
5.5.40.0070.03720.03
5.5.30.0030.04020.04
5.5.20.0000.05719.98
5.5.10.0030.04020.02
5.5.00.0070.03320.01
5.4.450.0070.08019.44
5.4.440.0070.06719.38
5.4.430.0100.07019.48
5.4.420.0100.07719.36
5.4.410.0200.06719.44
5.4.400.0100.06719.04
5.4.390.0030.06319.12
5.4.380.0070.06019.23
5.4.370.0030.07718.90
5.4.360.0000.05318.79
5.4.350.0100.06019.12
5.4.340.0070.08019.14
5.4.320.0100.05318.95
5.4.310.0030.06319.07
5.4.300.0070.03319.04
5.4.290.0000.04018.95
5.4.280.0170.03719.05
5.4.270.0070.03719.14
5.4.260.0070.04718.90
5.4.250.0070.03319.23
5.4.240.0000.04318.92
5.4.230.0070.03319.02
5.4.220.0100.04719.04
5.4.210.0070.07318.78
5.4.200.0030.03718.96
5.4.190.0000.04319.22
5.4.180.0030.04019.13
5.4.170.0030.04319.11
5.4.160.0030.03719.01
5.4.150.0070.03719.04
5.4.140.0030.03716.32
5.4.130.0030.03316.22
5.4.120.0030.04716.31
5.4.110.0000.04016.21
5.4.100.0070.03316.31
5.4.90.0070.03316.44
5.4.80.0000.03716.36
5.4.70.0000.03716.25
5.4.60.0030.03716.20
5.4.50.0070.03316.19
5.4.40.0100.03316.46
5.4.30.0030.04316.33
5.4.20.0000.03716.36
5.4.10.0030.03716.23
5.4.00.0100.02715.78
5.3.290.0100.06714.62
5.3.280.0070.04714.55
5.3.270.0070.05014.46
5.3.260.0000.04014.56
5.3.250.0030.03714.60
5.3.240.0070.03314.46
5.3.230.0030.03714.44
5.3.220.0030.03714.55
5.3.210.0030.03714.54
5.3.200.0000.04014.52
5.3.190.0000.04014.42
5.3.180.0030.03714.56
5.3.170.0000.03714.40
5.3.160.0000.03714.43
5.3.150.0030.04014.51
5.3.140.0030.03714.51
5.3.130.0100.03314.47
5.3.120.0030.03714.41
5.3.110.0000.04014.36
5.3.100.0000.03714.02
5.3.90.0000.04013.86
5.3.80.0000.03713.93
5.3.70.0000.04314.00
5.3.60.0030.04013.98
5.3.50.0030.03313.70
5.3.40.0030.03713.95
5.3.30.0100.04013.68
5.3.20.0030.03013.47
5.3.10.0030.04013.51
5.3.00.0030.03713.61
5.2.170.0030.04011.14
5.2.160.0000.03711.09
5.2.150.0000.03010.93
5.2.140.0000.03010.96
5.2.130.0000.02711.10
5.2.120.0030.02711.09
5.2.110.0070.04310.91
5.2.100.0070.03011.05
5.2.90.0100.04711.05
5.2.80.0000.06011.13
5.2.70.0030.06011.05
5.2.60.0000.03711.04
5.2.50.0170.05711.01
5.2.40.0030.06010.99
5.2.30.0070.03010.89
5.2.20.0030.06010.80
5.2.10.0100.03310.89
5.2.00.0100.03010.77
5.1.60.0130.0479.87
5.1.50.0070.0509.83
5.1.40.0070.05010.04
5.1.30.0000.03310.27
5.1.20.0030.06010.20
5.1.10.0000.03310.11
5.1.00.0070.0539.94
5.0.50.0030.0238.56
5.0.40.0100.0238.42
5.0.30.0030.0638.22
5.0.20.0030.0278.26
5.0.10.0000.0238.21
5.0.00.0070.0338.19
4.4.90.0000.0308.19
4.4.80.0070.0278.19
4.4.70.0030.0408.19
4.4.60.0030.0338.19
4.4.50.0030.0278.19
4.4.40.0000.0308.19
4.4.30.0030.0338.19
4.4.20.0030.0378.19
4.4.10.0030.0338.19
4.4.00.0000.0578.19
4.3.110.0030.0378.19
4.3.100.0000.0178.19
4.3.90.0030.0338.19
4.3.80.0100.0238.19
4.3.70.0000.0308.19
4.3.60.0000.0208.19
4.3.50.0070.0338.19
4.3.40.0070.0478.19
4.3.30.0030.0238.19
4.3.20.0000.0408.19
4.3.10.0030.0278.19
4.3.00.0000.0378.19

preferences:
49.37 ms | 401 KiB | 5 Q