3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ''; $b = NULL; $c = ' '; echo isset($a); echo "\r\n"; echo isset($b); echo "\r\n"; echo isset($c); echo "\r\n"; echo isset($d); echo "\r\n"; echo empty($a); echo "\r\n"; echo empty($b); echo "\r\n"; echo empty($c); echo "\r\n"; echo empty($d); echo "\r\n";

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)
8.3.40.0100.01018.59
8.3.30.0070.01118.92
8.3.20.0030.00520.04
8.3.10.0040.00423.61
8.3.00.0000.00819.38
8.2.170.0110.01122.96
8.2.160.0130.00320.22
8.2.150.0080.00024.18
8.2.140.0050.00324.66
8.2.130.0050.00326.16
8.2.120.0050.00322.27
8.2.110.0070.00421.03
8.2.100.0060.00617.91
8.2.90.0040.00419.23
8.2.80.0080.00017.97
8.2.70.0040.00417.63
8.2.60.0000.00918.05
8.2.50.0080.00018.10
8.2.40.0040.00419.89
8.2.30.0000.00918.11
8.2.20.0040.00417.57
8.2.10.0000.00717.88
8.2.00.0040.00417.59
8.1.270.0060.00323.69
8.1.260.0080.00026.35
8.1.250.0040.00428.09
8.1.240.0000.00822.72
8.1.230.0060.00617.76
8.1.220.0040.00417.74
8.1.210.0000.00818.77
8.1.200.0060.00317.23
8.1.190.0080.00017.10
8.1.180.0000.00818.10
8.1.170.0080.00018.49
8.1.160.0050.00321.97
8.1.150.0040.00418.61
8.1.140.0040.00417.29
8.1.130.0000.00617.71
8.1.120.0000.00717.39
8.1.110.0040.00417.29
8.1.100.0000.01117.33
8.1.90.0030.00317.45
8.1.80.0040.00417.39
8.1.70.0000.00717.38
8.1.60.0040.00417.54
8.1.50.0000.00817.47
8.1.40.0040.00417.34
8.1.30.0040.00417.48
8.1.20.0040.00417.52
8.1.10.0040.00417.40
8.1.00.0000.00717.38
8.0.300.0040.00418.77
8.0.290.0050.00316.58
8.0.280.0030.00318.35
8.0.270.0030.00517.29
8.0.260.0060.00017.32
8.0.250.0030.00316.93
8.0.240.0000.00716.98
8.0.230.0000.00616.94
8.0.220.0000.00816.88
8.0.210.0000.00716.74
8.0.200.0000.00716.89
8.0.190.0040.00416.87
8.0.180.0000.01016.80
8.0.170.0050.00316.86
8.0.160.0070.00016.81
8.0.150.0040.00416.73
8.0.140.0080.00016.82
8.0.130.0060.00013.22
8.0.120.0040.00416.73
8.0.110.0040.00416.72
8.0.100.0000.00716.76
8.0.90.0000.00816.70
8.0.80.0090.00616.70
8.0.70.0000.00716.63
8.0.60.0000.00816.81
8.0.50.0000.00716.61
8.0.30.0110.01116.92
8.0.20.0140.00717.40
8.0.10.0050.00216.77
8.0.00.0120.00616.78
7.4.330.0050.00015.15
7.4.320.0030.00316.50
7.4.300.0050.00216.54
7.4.290.0000.00716.43
7.4.280.0000.00716.41
7.4.270.0000.00716.45
7.4.260.0000.00716.30
7.4.250.0040.00416.48
7.4.240.0040.00416.48
7.4.230.0050.00216.23
7.4.220.0080.00816.54
7.4.210.0080.00616.49
7.4.200.0030.00316.50
7.4.190.0000.00716.37
7.4.160.0080.00816.30
7.4.150.0030.01317.40
7.4.140.0080.01017.86
7.4.130.0070.00916.47
7.4.120.0090.00816.53
7.4.110.0050.01116.43
7.4.100.0070.01116.35
7.4.90.0060.01216.37
7.4.80.0090.01219.39
7.4.70.0170.00316.51
7.4.60.0080.00816.24
7.4.50.0000.00716.23
7.4.40.0090.00916.34
7.4.30.0030.01316.61
7.4.00.0030.01014.81
7.3.330.0000.00513.02
7.3.320.0000.00512.88
7.3.310.0040.00416.20
7.3.300.0000.00716.09
7.3.290.0000.01416.05
7.3.280.0050.01216.18
7.3.270.0080.01117.40
7.3.260.0160.00416.19
7.3.250.0110.01016.38
7.3.240.0080.01116.15
7.3.230.0130.00616.39
7.3.210.0080.00816.02
7.3.200.0060.00619.39
7.3.190.0070.01416.21
7.3.180.0100.00716.35
7.3.170.0060.00916.36
7.3.160.0050.01016.30
7.3.120.0060.00614.72
7.2.330.0140.00316.51
7.2.320.0030.02116.47
7.2.310.0120.00616.38
7.2.300.0120.00816.54
7.2.290.0140.00316.56
7.2.60.0110.00416.88
7.1.200.0000.00915.55
7.1.70.0000.00716.93
7.1.60.0160.01019.46
7.1.50.0080.00816.97
7.1.00.0100.07022.40
7.0.200.0000.00716.19
7.0.140.0030.07022.04
7.0.90.0700.08320.13
7.0.80.0530.07020.01
7.0.70.0530.08019.89
7.0.60.0600.08719.90
7.0.50.0570.04720.28
7.0.40.0070.04020.05
7.0.30.0030.07020.09
7.0.20.0070.04320.04
7.0.10.0030.05720.05
7.0.00.0100.08320.07
5.6.280.0070.07021.03
5.6.230.0100.06320.49
5.6.220.0100.07320.71
5.6.210.0100.04020.65
5.6.200.0200.07321.02
5.6.190.0030.05021.09
5.6.180.0100.06321.02
5.6.170.0030.06720.95
5.6.160.0070.06321.02
5.6.150.0030.05021.16
5.6.140.0130.08021.12
5.6.130.0130.07721.16
5.6.120.0100.08321.03
5.6.110.0000.09321.09
5.6.100.0100.08021.10
5.6.90.0130.07721.00
5.6.80.0100.04020.45
5.6.70.0070.07720.38
5.6.60.0100.05020.31
5.6.50.0130.07320.43
5.6.40.0100.05320.31
5.6.30.0100.07020.37
5.6.20.0070.07720.38
5.6.10.0130.07020.46
5.6.00.0070.07720.29
5.5.370.0100.04720.40
5.5.360.0030.05720.47
5.5.350.0070.05720.41
5.5.340.0030.06320.73
5.5.330.0130.03720.91
5.5.320.0130.08020.85
5.5.310.0130.07320.84
5.5.300.0130.07020.88
5.5.290.0100.07720.90
5.5.280.0200.06320.85
5.5.270.0130.04320.71
5.5.260.0100.04320.87
5.5.250.0070.04320.44
5.5.240.0030.05020.25
5.5.230.0100.08020.01
5.5.220.0000.05020.13
5.5.210.0130.07320.14
5.5.200.0130.07720.23
5.5.190.0130.07020.10
5.5.180.0130.07720.27
5.5.160.0070.06020.23
5.5.150.0030.08020.13
5.5.140.0130.04320.23
5.5.130.0130.07320.16
5.5.120.0100.07020.25
5.5.110.0100.06020.17
5.5.100.0130.07720.07
5.5.90.0100.05320.09
5.5.80.0100.07019.96
5.5.70.0170.07020.10
5.5.60.0030.07719.92
5.5.50.0100.03720.14
5.5.40.0030.08320.13
5.5.30.0100.08020.00
5.5.20.0070.08320.07
5.5.10.0100.05020.13
5.5.00.0070.06719.99
5.4.450.0100.08319.39
5.4.440.0000.08719.42
5.4.430.0130.07319.34
5.4.420.0130.07319.46
5.4.410.0070.04019.12
5.4.400.0100.07718.98
5.4.390.0070.07718.90
5.4.380.0000.05318.91
5.4.370.0070.08018.88
5.4.360.0130.07319.04
5.4.350.0070.04318.98
5.4.340.0100.07019.06
5.4.320.0070.07319.15
5.4.310.0170.07019.03
5.4.300.0100.07318.90
5.4.290.0130.06318.78
5.4.280.0030.07719.23
5.4.270.0100.06019.16
5.4.260.0130.07019.02
5.4.250.0100.07318.94
5.4.240.0030.05319.05
5.4.230.0070.05319.22
5.4.220.0100.06718.77
5.4.210.0100.07019.22
5.4.200.0170.06718.97
5.4.190.0070.07319.22
5.4.180.0030.05719.09
5.4.170.0100.07319.09
5.4.160.0100.04719.02
5.4.150.0000.05718.92
5.4.140.0130.06716.28
5.4.130.0030.08016.34
5.4.120.0030.08016.06
5.4.110.0000.08316.34
5.4.100.0030.07716.45
5.4.90.0070.07016.31
5.4.80.0100.05316.39
5.4.70.0070.07316.40
5.4.60.0070.07316.42
5.4.50.0070.07716.31
5.4.40.0070.07316.25
5.4.30.0000.04316.20
5.4.20.0070.05316.32
5.4.10.0030.07316.43
5.4.00.0000.07315.83
5.3.290.0200.06714.66
5.3.280.0070.06714.42
5.3.270.0030.04714.60
5.3.260.0030.08014.46
5.3.250.0070.07714.58
5.3.240.0070.07314.52
5.3.230.0070.05314.45
5.3.220.0070.07314.40
5.3.210.0070.07714.51
5.3.200.0170.06314.55
5.3.190.0100.07314.53
5.3.180.0000.06014.55
5.3.170.0070.06014.42
5.3.160.0000.07714.52
5.3.150.0030.07014.56
5.3.140.0070.07714.41
5.3.130.0130.06714.55
5.3.120.0070.05014.49
5.3.110.0070.07314.38
5.3.100.0030.08013.86
5.3.90.0100.06013.84
5.3.80.0030.05313.96
5.3.70.0030.06014.00
5.3.60.0130.03713.99
5.3.50.0030.04013.90
5.3.40.0070.06313.94
5.3.30.0100.06313.86
5.3.20.0070.06713.67
5.3.10.0130.05313.63
5.3.00.0100.05313.57
5.2.170.0070.06013.57
5.2.160.0070.04713.57
5.2.150.0070.06313.57
5.2.140.0030.04313.57
5.2.130.0070.05013.57
5.2.120.0070.03713.57
5.2.110.0030.06313.57
5.2.100.0100.04013.57
5.2.90.0030.06013.57
5.2.80.0170.04713.57
5.2.70.0030.06313.57
5.2.60.0000.04013.57
5.2.50.0070.04713.57
5.2.40.0070.03713.57
5.2.30.0030.06313.57
5.2.20.0100.03713.57
5.2.10.0100.03713.57
5.2.00.0100.04713.57
5.1.60.0030.05713.57
5.1.50.0000.05713.57
5.1.40.0030.05313.57
5.1.30.0000.04313.57
5.1.20.0100.03713.57
5.1.10.0130.04013.57
5.1.00.0070.03313.57
5.0.50.0000.04013.57
5.0.40.0000.03713.57
5.0.30.0070.06713.57
5.0.20.0030.03313.57
5.0.10.0070.03013.57
5.0.00.0030.05713.57
4.4.90.0030.03713.57
4.4.80.0030.03313.57
4.4.70.0030.03013.57
4.4.60.0030.03013.57
4.4.50.0000.02713.57
4.4.40.0030.04313.57
4.4.30.0030.03313.57
4.4.20.0070.03013.57
4.4.10.0000.03313.57
4.4.00.0000.05713.57
4.3.110.0030.03013.57
4.3.100.0000.03013.57
4.3.90.0030.02313.57
4.3.80.0000.04313.57
4.3.70.0030.03013.57
4.3.60.0000.02713.57
4.3.50.0030.03313.57
4.3.40.0000.04713.57
4.3.30.0000.03713.57
4.3.20.0030.02713.57
4.3.10.0030.03313.57
4.3.00.0000.03313.57

preferences:
39.87 ms | 400 KiB | 5 Q