3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "<derp>"; $words = array(); $words[] = &$string; $derp = array(); $derp[] = &$string; $words[0] = substr($string, 1); $words[0] = substr($string, 0, -1); var_dump($derp);

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)
8.3.60.0090.00618.31
8.3.50.0130.00521.14
8.3.40.0040.01118.59
8.3.30.0140.00020.33
8.3.20.0070.00020.34
8.3.10.0040.00421.92
8.3.00.0000.00822.40
8.2.180.0070.00716.75
8.2.170.0120.00322.96
8.2.160.0080.00522.13
8.2.150.0030.00524.18
8.2.140.0030.00624.66
8.2.130.0040.01126.16
8.2.120.0080.00020.75
8.2.110.0060.00322.25
8.2.100.0080.00417.78
8.2.90.0040.00419.08
8.2.80.0040.00419.38
8.2.70.0000.00917.61
8.2.60.0030.00618.03
8.2.50.0040.00418.07
8.2.40.0040.00418.16
8.2.30.0040.00419.41
8.2.20.0040.00417.64
8.2.10.0030.00617.68
8.2.00.0040.00417.55
8.1.280.0120.00625.92
8.1.270.0050.00323.99
8.1.260.0000.00826.35
8.1.250.0070.00428.09
8.1.240.0040.00423.69
8.1.230.0000.01119.06
8.1.220.0040.00417.74
8.1.210.0050.00318.77
8.1.200.0060.00317.00
8.1.190.0040.00417.53
8.1.180.0040.00419.01
8.1.170.0000.00818.57
8.1.160.0040.00418.70
8.1.150.0000.00718.45
8.1.140.0040.00417.30
8.1.130.0030.00317.81
8.1.120.0040.00417.44
8.1.110.0000.00717.27
8.1.100.0040.00417.38
8.1.90.0000.00717.28
8.1.80.0040.00417.29
8.1.70.0030.00317.35
8.1.60.0000.00817.54
8.1.50.0030.00617.46
8.1.40.0080.00017.32
8.1.30.0000.00717.46
8.1.20.0040.00417.57
8.1.10.0000.00817.38
8.1.00.0060.00617.44
8.0.300.0040.00418.77
8.0.290.0070.00017.18
8.0.280.0000.00718.44
8.0.270.0030.00317.07
8.0.260.0000.00716.64
8.0.250.0030.00316.86
8.0.240.0040.00416.90
8.0.230.0030.00316.90
8.0.220.0070.00016.78
8.0.210.0030.00316.81
8.0.200.0060.00016.86
8.0.190.0000.00716.86
8.0.180.0040.00416.84
8.0.170.0040.00416.89
8.0.160.0000.00716.87
8.0.150.0050.00616.76
8.0.140.0040.00416.68
8.0.130.0030.00313.26
8.0.120.0040.00416.79
8.0.110.0040.00416.70
8.0.100.0030.00516.77
8.0.90.0000.00816.78
8.0.80.0060.01016.85
8.0.70.0000.00816.68
8.0.60.0000.00716.67
8.0.50.0000.00816.76
8.0.30.0090.00917.15
8.0.20.0100.00817.40
8.0.10.0000.00716.95
8.0.00.0090.01316.73
7.4.330.0020.00215.00
7.4.320.0000.00616.52
7.4.300.0040.00416.51
7.4.290.0070.00016.29
7.4.280.0070.00016.33
7.4.270.0030.00316.45
7.4.260.0000.00613.17
7.4.250.0000.00816.44
7.4.240.0020.00616.47
7.4.230.0070.00016.55
7.4.220.0090.00916.38
7.4.210.0090.00816.51
7.4.200.0030.00316.41
7.4.190.0030.00316.58
7.4.160.0150.00616.59
7.4.150.0130.00417.40
7.4.140.0120.01017.86
7.4.130.0070.01016.44
7.4.120.0110.00916.44
7.4.110.0120.01216.45
7.4.100.0120.00616.57
7.4.90.0090.00916.41
7.4.80.0070.01319.39
7.4.70.0030.01316.50
7.4.60.0090.00616.41
7.4.50.0030.00516.39
7.4.40.0030.01022.77
7.4.30.0070.01016.50
7.4.00.0070.01014.78
7.3.330.0000.00513.04
7.3.320.0000.00512.94
7.3.310.0040.00416.26
7.3.300.0000.00716.24
7.3.290.0070.00716.24
7.3.280.0040.01216.21
7.3.270.0120.00617.40
7.3.260.0070.01016.22
7.3.250.0150.00516.36
7.3.240.0100.01116.28
7.3.230.0120.00416.39
7.3.210.0130.00316.42
7.3.200.0080.01219.39
7.3.190.0120.00616.60
7.3.180.0150.00016.06
7.3.170.0070.00816.27
7.3.160.0130.00316.13
7.3.120.0050.01314.57
7.3.110.0060.01314.66
7.3.100.0040.01014.71
7.3.90.0060.00514.73
7.3.80.0050.00714.75
7.3.70.0070.00414.75
7.3.60.0080.00614.68
7.3.50.0020.01214.86
7.3.40.0040.00714.80
7.3.30.0080.00414.74
7.3.20.0030.00916.54
7.3.10.0040.00716.40
7.3.00.0050.00516.67
7.2.330.0060.01216.47
7.2.320.0150.00616.52
7.2.310.0120.00416.22
7.2.300.0100.00716.50
7.2.290.0070.01016.79
7.2.250.0060.01015.13
7.2.240.0060.01314.99
7.2.230.0070.00714.82
7.2.220.0070.00814.95
7.2.210.0070.00914.71
7.2.200.0060.00715.05
7.2.190.0000.01415.04
7.2.180.0030.01015.05
7.2.170.0040.00914.93
7.2.160.0070.01014.92
7.2.150.0060.01217.04
7.2.140.0070.00316.85
7.2.130.0030.00816.73
7.2.120.0030.01116.87
7.2.110.0060.00516.71
7.2.100.0030.01116.63
7.2.90.0030.01016.77
7.2.80.0080.00316.71
7.2.70.0060.00616.72
7.2.60.0050.01016.89
7.2.50.0040.00916.79
7.2.40.0060.00916.67
7.2.30.0100.00716.80
7.2.20.0050.01216.81
7.2.10.0000.01116.87
7.2.00.0070.00917.81
7.1.330.0080.00815.81
7.1.320.0070.00515.66
7.1.310.0060.00915.64
7.1.300.0080.00515.76
7.1.290.0030.00915.70
7.1.280.0070.00515.70
7.1.270.0070.00715.75
7.1.260.0070.00515.71
7.1.250.0060.00515.89
7.1.240.0080.00415.67
7.1.230.0030.00615.70
7.1.220.0000.00915.66
7.1.210.0030.00615.88
7.1.200.0030.00815.76
7.1.190.0040.01115.71
7.1.180.0000.01415.68
7.1.170.0070.00415.64
7.1.160.0040.00415.70
7.1.150.0030.00715.73
7.1.140.0090.00915.93
7.1.130.0030.01415.65
7.1.120.0080.00415.89
7.1.110.0090.00615.86
7.1.100.0080.00817.00
7.1.90.0000.01215.59
7.1.80.0110.00415.64
7.1.70.0030.01116.53
7.1.60.0090.01117.54
7.1.50.0080.00616.30
7.1.40.0110.00415.97
7.1.30.0000.01015.45
7.1.20.0080.00815.68
7.1.10.0060.00315.69
7.1.00.0050.01819.11
7.0.330.0000.00915.39
7.0.320.0060.00615.50
7.0.310.0070.00715.47
7.0.300.0000.01315.50
7.0.290.0130.00315.41
7.0.280.0100.00015.39
7.0.270.0040.00815.40
7.0.260.0070.01015.57
7.0.250.0060.00615.18
7.0.240.0110.00415.50
7.0.230.0070.00715.08
7.0.220.0100.00315.11
7.0.210.0040.01115.43
7.0.200.0080.00316.01
7.0.190.0060.00315.46
7.0.180.0120.00015.32
7.0.170.0100.00315.38
7.0.160.0100.00015.55
7.0.150.0040.00715.41
7.0.140.0050.04018.75
7.0.130.0040.00715.32
7.0.120.0000.01515.24
7.0.110.0000.01415.36
7.0.100.0090.00315.34
7.0.90.0040.00415.36
7.0.80.0250.05117.81
7.0.70.0080.04017.64
7.0.60.0070.04117.60
7.0.50.0080.03217.99
7.0.40.0090.04416.78
7.0.30.0070.04716.80
7.0.20.0130.04016.78
7.0.10.0070.04216.85
7.0.00.0070.04916.83
5.6.400.0030.01014.66
5.6.390.0100.00314.47
5.6.380.0090.00314.63
5.6.370.0060.00614.21
5.6.360.0080.00514.23
5.6.350.0070.01014.33
5.6.340.0070.01014.65
5.6.330.0070.00714.30
5.6.320.0120.00314.55
5.6.310.0040.01114.56
5.6.300.0060.01014.49
5.6.290.0060.00614.27
5.6.280.0020.04117.78
5.6.270.0000.01314.55
5.6.260.0000.01514.64
5.6.250.0070.00714.22
5.6.240.0080.00014.23
5.6.230.0070.04817.42
5.6.220.0090.04217.43
5.6.210.0030.04317.51
5.6.200.0030.04617.71
5.6.190.0090.03917.73
5.6.180.0080.03317.59
5.6.170.0070.04817.66
5.6.160.0080.03517.63
5.6.150.0070.04717.73
5.6.140.0100.04917.71
5.6.130.0100.04317.73
5.6.120.0040.03117.60
5.6.110.0100.04417.76
5.6.100.0100.04517.69
5.6.90.0050.03617.62
5.6.80.0090.04217.23
5.6.70.0040.04617.26
5.6.60.0070.04217.34
5.6.50.0030.04317.31
5.6.40.0050.02317.33
5.6.30.0050.02517.25
5.6.20.0110.02517.37
5.6.10.0050.02417.34
5.6.00.0050.02817.48
5.5.380.0070.00714.29
5.5.370.0080.04117.47
5.5.360.0100.04017.42
5.5.350.0070.04717.36
5.5.340.0080.03717.54
5.5.330.0100.04017.60
5.5.320.0050.03717.36
5.5.310.0090.04417.40
5.5.300.0180.01817.59
5.5.290.0070.04217.57
5.5.280.0070.04117.59
5.5.270.0070.03617.43
5.5.260.0100.03717.69
5.5.250.0080.04717.36
5.5.240.0070.04417.00
5.5.230.0140.02617.02
5.5.220.0130.03817.28
5.5.210.0070.04717.18
5.5.200.0080.02517.14
5.5.190.0030.02517.26
5.5.180.0080.02317.24
5.5.170.0000.01714.08
5.5.160.0060.02017.11
5.5.150.0030.02517.14
5.5.140.0080.01817.25
5.5.130.0060.02117.18
5.5.120.0030.02517.18
5.5.110.0090.02017.02
5.5.100.0050.02217.19
5.5.90.0050.03517.24
5.5.80.0040.02717.30
5.5.70.0050.03317.18
5.5.60.0060.02317.23
5.5.50.0050.02617.02
5.5.40.0060.02317.19
5.5.30.0020.02717.13
5.5.20.0040.02417.09
5.5.10.0030.03117.12
5.5.00.0060.02317.08
5.4.450.0060.03115.11
5.4.440.0050.03715.13
5.4.430.0050.04515.06
5.4.420.0080.03315.20
5.4.410.0030.04015.09
5.4.400.0070.04015.07
5.4.390.0030.04815.10
5.4.380.0080.04015.14
5.4.370.0020.03414.96
5.4.360.0020.03015.10
5.4.350.0030.02314.88
5.4.340.0070.02714.80
5.4.330.0030.01011.09
5.4.320.0040.02315.01
5.4.310.0090.01715.13
5.4.300.0000.02315.02
5.4.290.0030.02114.98
5.4.280.0090.04114.95
5.4.270.0070.03514.85
5.4.260.0030.02214.96
5.4.250.0060.04115.02
5.4.240.0040.02614.88
5.4.230.0090.01714.96
5.4.220.0020.02614.89
5.4.210.0030.02114.99
5.4.200.0050.02115.05
5.4.190.0020.03115.11
5.4.180.0000.02615.01
5.4.170.0060.02115.10
5.4.160.0030.02314.80
5.4.150.0060.01615.20
5.4.140.0040.01913.64
5.4.130.0020.03013.66
5.4.120.0050.03313.68
5.4.110.0000.02113.63
5.4.100.0050.01613.64
5.4.90.0050.02313.56
5.4.80.0090.01513.60
5.4.70.0030.02413.73
5.4.60.0080.01313.60
5.4.50.0050.01813.57
5.4.40.0070.01713.56
5.4.30.0050.02613.63
5.4.20.0050.01913.69
5.4.10.0020.02413.51
5.4.00.0040.03713.45
5.3.290.0030.02312.63
5.3.280.0030.03212.47
5.3.270.0050.01812.51
5.3.260.0040.01912.51
5.3.250.0050.04112.60
5.3.240.0030.03012.48
5.3.230.0010.02312.48
5.3.220.0030.01812.45
5.3.210.0020.02812.49
5.3.200.0000.02212.29
5.3.190.0020.02212.42
5.3.180.0040.02012.48
5.3.170.0030.02012.48
5.3.160.0020.02012.55
5.3.150.0040.02212.54
5.3.140.0050.02012.44
5.3.130.0000.02512.49
5.3.120.0020.02312.50
5.3.110.0050.01612.53
5.3.100.0030.03112.19
5.3.90.0010.04312.19
5.3.80.0040.02912.14
5.3.70.0040.02712.14
5.3.60.0050.02512.07
5.3.50.0050.02512.03
5.3.40.0080.03512.15
5.3.30.0180.03012.00
5.3.20.0050.03811.87
5.3.10.0100.03511.78
5.3.00.0060.03711.76
5.2.170.0030.06311.62
5.2.160.0000.04711.62
5.2.150.0070.06311.62
5.2.140.0070.04311.62
5.2.130.0170.04311.62
5.2.120.0100.04011.62
5.2.110.0000.05711.62
5.2.100.0030.05011.62
5.2.90.0170.03711.62
5.2.80.0100.05711.62
5.2.70.0070.04311.62
5.2.60.0070.06311.62
5.2.50.0070.03311.62
5.2.40.0030.06011.62
5.2.30.0070.05711.62
5.2.20.0100.05311.62
5.2.10.0070.04711.62
5.2.00.0000.04311.62
5.1.60.0130.03011.62
5.1.50.0000.04311.62
5.1.40.0070.04711.62
5.1.30.0100.05011.62
5.1.20.0030.06011.62
5.1.10.0030.05711.62
5.1.00.0130.05011.62
5.0.50.0030.04011.62
5.0.40.0000.04311.62
5.0.30.0070.06011.62
5.0.20.0000.04311.62
5.0.10.0100.04011.62
5.0.00.0030.07011.62
4.4.90.0000.03311.62
4.4.80.0070.01711.62
4.4.70.0070.03011.62
4.4.60.0000.03311.62
4.4.50.0030.03011.62
4.4.40.0030.05311.62
4.4.30.0000.03711.62
4.4.20.0030.02311.62
4.4.10.0030.03311.62
4.4.00.0070.04711.62
4.3.110.0030.03311.62
4.3.100.0070.03011.62
4.3.90.0000.04011.62
4.3.80.0030.05011.62
4.3.70.0030.03311.62
4.3.60.0030.03311.62
4.3.50.0000.03311.62
4.3.40.0000.05311.62
4.3.30.0030.03311.62
4.3.20.0070.02711.62
4.3.10.0030.03311.62
4.3.00.0030.03311.62

preferences:
46.87 ms | 401 KiB | 5 Q