3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 'abcdef'; $x = substr($a, 0, strlen($a)-1);echo $x;echo "\n"; $y = substr($x, 0, strlen($x)-1);echo $y;

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)
8.3.70.0090.00916.75
8.3.60.0100.00718.43
8.3.50.0120.01221.14
8.3.40.0120.00318.64
8.3.30.0100.00720.25
8.3.20.0050.00318.74
8.3.10.0040.00420.80
8.3.00.0000.00722.45
8.2.180.0160.00016.72
8.2.170.0090.01222.96
8.2.160.0040.01020.33
8.2.150.0040.00424.18
8.2.140.0000.00824.66
8.2.130.0040.00426.16
8.2.120.0000.00721.18
8.2.110.0070.00320.40
8.2.100.0070.00417.91
8.2.90.0090.00019.64
8.2.80.0080.00017.63
8.2.70.0030.00617.63
8.2.60.0040.00418.04
8.2.50.0000.00818.07
8.2.40.0000.00820.01
8.2.30.0050.00318.09
8.2.20.0030.00617.67
8.2.10.0050.00217.77
8.2.00.0040.00417.73
8.1.280.0000.01525.92
8.1.270.0050.00323.99
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0180.00322.14
8.1.230.0110.00022.20
8.1.220.0040.00417.77
8.1.210.0000.00919.04
8.1.200.0060.00317.23
8.1.190.0080.00017.22
8.1.180.0050.00318.81
8.1.170.0060.00318.71
8.1.160.0050.00218.80
8.1.150.0060.00318.56
8.1.140.0000.00817.41
8.1.130.0030.00317.82
8.1.120.0000.00817.42
8.1.110.0040.00417.34
8.1.100.0030.00317.38
8.1.90.0050.00217.29
8.1.80.0030.00517.31
8.1.70.0070.00017.35
8.1.60.0000.00817.42
8.1.50.0030.00617.47
8.1.40.0080.00017.49
8.1.30.0080.00017.50
8.1.20.0000.00917.58
8.1.10.0060.00317.48
8.1.00.0000.00817.46
8.0.300.0030.00319.90
8.0.290.0000.00816.75
8.0.280.0000.00718.45
8.0.270.0050.00317.88
8.0.260.0040.00418.44
8.0.250.0000.00816.92
8.0.240.0080.00016.90
8.0.230.0000.00716.82
8.0.220.0000.00716.73
8.0.210.0000.00716.82
8.0.200.0020.00516.91
8.0.190.0090.00016.86
8.0.180.0040.00416.78
8.0.170.0000.00716.82
8.0.160.0070.00016.84
8.0.150.0040.00416.77
8.0.140.0080.00416.79
8.0.130.0030.00313.25
8.0.120.0040.00416.69
8.0.110.0040.00416.88
8.0.100.0030.00516.67
8.0.90.0040.00416.69
8.0.80.0130.01016.81
8.0.70.0000.00816.89
8.0.60.0040.00416.84
8.0.50.0000.00716.71
8.0.30.0160.00316.95
8.0.20.0100.00817.40
8.0.10.0070.00016.74
8.0.00.0100.00916.74
7.4.330.0050.00016.80
7.4.320.0000.00616.45
7.4.300.0040.00416.54
7.4.290.0030.00316.57
7.4.280.0030.00316.43
7.4.270.0020.00516.57
7.4.260.0060.00013.21
7.4.250.0000.00716.48
7.4.240.0000.00716.52
7.4.230.0070.00016.63
7.4.220.0100.01616.46
7.4.210.0100.00716.47
7.4.200.0030.00316.54
7.4.190.0030.00316.71
7.4.160.0040.01316.45
7.4.150.0000.01817.40
7.4.140.0100.00717.86
7.4.130.0110.00716.40
7.4.120.0090.01016.46
7.4.110.0120.00616.62
7.4.100.0140.00416.52
7.4.90.0070.01116.60
7.4.80.0100.01019.39
7.4.70.0100.00716.57
7.4.60.0120.00616.34
7.4.50.0030.00516.41
7.4.40.0040.01122.77
7.4.30.0120.00916.57
7.4.10.0050.01315.02
7.4.00.0090.00614.83
7.3.330.0050.00013.18
7.3.320.0000.00513.21
7.3.310.0000.00716.25
7.3.300.0030.00316.16
7.3.290.0040.01116.40
7.3.280.0070.01116.33
7.3.270.0130.00317.40
7.3.260.0080.01118.24
7.3.250.0090.00916.35
7.3.240.0100.01016.49
7.3.230.0160.00016.47
7.3.210.0170.00416.25
7.3.200.0110.00819.39
7.3.190.0090.00616.22
7.3.180.0070.01416.42
7.3.170.0060.01016.44
7.3.160.0150.00616.27
7.3.130.0100.00814.68
7.3.120.0100.00714.76
7.3.110.0050.00914.68
7.3.100.0030.01214.52
7.3.90.0060.00914.79
7.3.80.0090.00514.88
7.3.70.0080.00614.69
7.3.60.0120.00514.63
7.3.50.0050.00714.83
7.3.40.0040.00714.88
7.3.30.0120.00214.56
7.3.20.0050.00916.67
7.3.10.0020.01016.53
7.3.00.0080.00716.53
7.2.330.0100.00716.56
7.2.320.0130.00916.74
7.2.310.0090.01216.79
7.2.300.0040.01216.58
7.2.290.0140.00416.38
7.2.260.0080.01014.95
7.2.250.0080.00915.00
7.2.240.0060.00915.13
7.2.230.0050.01214.94
7.2.220.0050.01215.06
7.2.210.0030.00914.91
7.2.200.0050.01014.76
7.2.190.0080.00914.93
7.2.180.0040.00914.92
7.2.170.0070.00714.97
7.2.160.0040.01214.85
7.2.150.0080.00416.98
7.2.140.0050.00816.81
7.2.130.0070.00516.73
7.2.120.0050.00716.81
7.2.110.0040.01116.90
7.2.100.0050.01216.81
7.2.90.0070.00616.88
7.2.80.0080.00516.97
7.2.70.0070.00816.97
7.2.60.0070.00716.75
7.2.50.0060.00716.72
7.2.40.0090.00616.87
7.2.30.0060.00916.90
7.2.20.0070.00616.87
7.2.10.0060.00616.74
7.2.00.0080.00617.44
7.1.330.0050.01015.92
7.1.320.0070.00815.68
7.1.310.0070.00615.77
7.1.300.0020.01515.79
7.1.290.0040.00615.52
7.1.280.0030.01015.78
7.1.270.0050.00815.64
7.1.260.0040.00615.56
7.1.250.0060.00715.78
7.1.240.0050.00515.78
7.1.230.0070.00315.84
7.1.220.0040.00815.80
7.1.210.0040.00915.87
7.1.200.0040.00815.81
7.1.190.0030.01015.79
7.1.180.0060.00415.68
7.1.170.0110.00315.87
7.1.160.0050.00615.86
7.1.150.0050.00915.69
7.1.140.0030.00815.77
7.1.130.0070.00715.79
7.1.120.0050.00615.60
7.1.110.0090.00415.72
7.1.100.0060.00816.33
7.1.90.0070.00715.87
7.1.80.0030.01015.74
7.1.70.0050.00916.22
7.1.60.0070.01016.62
7.1.50.0030.01116.04
7.1.40.0080.00415.78
7.1.30.0060.01015.78
7.1.20.0060.00915.75
7.1.10.0040.00915.75
7.1.00.0050.01317.48
7.0.330.0020.00815.43
7.0.320.0060.00615.37
7.0.310.0060.00415.19
7.0.300.0030.00915.30
7.0.290.0050.01015.26
7.0.280.0020.01015.30
7.0.270.0060.00515.44
7.0.260.0080.00615.38
7.0.250.0060.00715.39
7.0.240.0050.01015.46
7.0.230.0040.00615.42
7.0.220.0080.00515.49
7.0.210.0030.00815.18
7.0.200.0080.00815.64
7.0.190.0050.00815.46
7.0.180.0040.00815.41
7.0.170.0080.00615.28
7.0.160.0100.00315.40
7.0.150.0030.00815.37
7.0.140.0050.02517.05
7.0.130.0040.00915.26
7.0.120.0040.00715.23
7.0.110.0040.00915.34
7.0.100.0050.02816.43
7.0.90.0130.03216.46
7.0.80.0080.01716.42
7.0.70.0080.02416.50
7.0.60.0070.02616.52
7.0.50.0100.02616.62
7.0.40.0060.01815.08
7.0.30.0090.01714.93
7.0.20.0070.01915.11
7.0.10.0080.01615.15
7.0.00.0070.02515.06
5.6.400.0080.00614.57
5.6.390.0020.01014.19
5.6.380.0040.01014.10
5.6.370.0060.00814.27
5.6.360.0070.01014.24
5.6.350.0060.00614.35
5.6.340.0040.01114.21
5.6.330.0060.00514.06
5.6.320.0050.00714.34
5.6.310.0050.00713.96
5.6.300.0020.01114.23
5.6.290.0020.01014.24
5.6.280.0060.02215.81
5.6.270.0060.00814.15
5.6.260.0040.00714.22
5.6.250.0060.01715.83
5.6.240.0070.02515.92
5.6.230.0080.02215.77
5.6.220.0050.01815.80
5.6.210.0080.02315.80
5.6.200.0080.01815.93
5.6.190.0060.02515.89
5.6.180.0070.02615.87
5.6.170.0070.02515.73
5.6.160.0040.02215.83
5.6.150.0040.02615.94
5.6.140.0090.01515.93
5.6.130.0090.02415.88
5.6.120.0070.01716.04
5.6.110.0060.02916.02
5.6.100.0070.02016.03
5.6.90.0070.01915.81
5.6.80.0100.02215.78
5.6.70.0080.01315.81
5.6.60.0080.02315.67
5.6.50.0100.02115.78
5.6.40.0090.02515.65
5.6.30.0090.02615.58
5.6.20.0090.02615.73
5.6.10.0080.02415.73
5.6.00.0050.01915.65
5.5.380.0080.02414.89
5.5.370.0040.02214.95
5.5.360.0100.02114.93
5.5.350.0070.02214.96
5.5.340.0050.01514.97
5.5.330.0100.01914.93
5.5.320.0060.01714.98
5.5.310.0050.02614.96
5.5.300.0070.02115.01
5.5.290.0060.02714.94
5.5.280.0050.02314.89
5.5.270.0070.01914.97
5.5.260.0060.02714.91
5.5.250.0080.01915.00
5.5.240.0030.02214.90
5.5.230.0070.02014.67
5.5.220.0070.02514.81
5.5.210.0050.01914.91
5.5.200.0030.02814.83
5.5.190.0070.02014.72
5.5.180.0060.02514.76
5.5.170.0080.00512.95
5.5.160.0050.02714.82
5.5.150.0090.02514.86
5.5.140.0130.02114.80
5.5.130.0060.02414.62
5.5.120.0050.02514.84
5.5.110.0080.01914.75
5.5.100.0030.02614.83
5.5.90.0080.01514.78
5.5.80.0060.01914.69
5.5.70.0050.02214.86
5.5.60.0050.01614.81
5.5.50.0050.02514.71
5.5.40.0050.02014.73
5.5.30.0080.01414.77
5.5.20.0060.01514.87
5.5.10.0100.02014.65
5.5.00.0070.02614.73
5.4.450.0050.02412.92
5.4.440.0070.02513.07
5.4.430.0060.01612.90
5.4.420.0060.01812.90
5.4.410.0070.02212.92
5.4.400.0060.01312.77
5.4.390.0040.02312.77
5.4.380.0080.01312.84
5.4.370.0040.01512.83
5.4.360.0070.02313.04
5.4.350.0060.02012.85
5.4.340.0070.02012.87
5.4.330.0040.00810.92
5.4.320.0060.01912.95
5.4.310.0080.02012.90
5.4.300.0040.02012.81
5.4.290.0070.01912.89
5.4.280.0070.01312.87
5.4.270.0060.02212.87
5.4.260.0080.01612.90
5.4.250.0040.02312.89
5.4.240.0040.02212.82
5.4.230.0060.01512.91
5.4.220.0060.02012.93
5.4.210.0040.02112.81
5.4.200.0070.02012.79
5.4.190.0070.01812.76
5.4.180.0050.02412.86
5.4.170.0070.02012.92
5.4.160.0050.02412.88
5.4.150.0030.02112.83
5.4.140.0060.02212.09
5.4.130.0030.01912.15
5.4.120.0060.01812.09
5.4.110.0010.02712.13
5.4.100.0040.02512.10
5.4.90.0070.02012.02
5.4.80.0090.02112.14
5.4.70.0100.02212.11
5.4.60.0090.02212.07
5.4.50.0040.01512.14
5.4.40.0030.01912.01
5.4.30.0040.01512.05
5.4.20.0060.02112.08
5.4.10.0080.02112.20
5.4.00.0050.02112.06
5.3.290.0040.01711.49
5.3.280.0060.02211.44
5.3.270.0050.02411.43
5.3.260.0050.02211.49
5.3.250.0080.02211.34
5.3.240.0060.02111.33
5.3.230.0080.02111.39
5.3.220.0030.02511.36
5.3.210.0050.01811.29
5.3.200.0050.01711.29
5.3.190.0040.02511.43
5.3.180.0050.01811.49
5.3.170.0060.02311.48
5.3.160.0050.01811.52
5.3.150.0030.02311.52
5.3.140.0060.01711.44
5.3.130.0060.01211.41
5.3.120.0040.02611.39
5.3.110.0070.02311.44
5.3.100.0040.02111.22
5.3.90.0040.02111.33
5.3.80.0050.02011.17
5.3.70.0040.02011.16
5.3.60.0040.02211.21
5.3.50.0040.01511.24
5.3.40.0040.01411.21
5.3.30.0070.01711.19
5.3.20.0050.01711.22
5.3.10.0050.01611.05
5.3.00.0070.01911.04
5.2.170.0030.02710.59
5.2.160.0050.02010.38
5.2.150.0040.01810.59
5.2.140.0080.03210.50
5.2.130.0050.02010.38
5.2.120.0030.01710.50
5.2.110.0020.03910.51
5.2.100.0080.02710.51
5.2.90.0020.03310.56
5.2.80.0050.02310.49
5.2.70.0050.03310.47
5.2.60.0020.02810.36
5.2.50.0030.03210.31
5.2.40.0050.03210.48
5.2.30.0070.03110.42
5.2.20.0030.02010.39
5.2.10.0070.02910.45
5.2.00.0050.02810.23
5.1.60.0070.02210.01
5.1.50.0080.01110.02
5.1.40.0050.01510.07
5.1.30.0060.01610.15
5.1.20.0040.01510.06
5.1.10.0010.01610.12
5.1.00.0010.0159.96
5.0.50.0020.0159.95
5.0.40.0030.0129.95
5.0.30.0060.0159.95
5.0.20.0020.0139.95
5.0.10.0020.0109.95
5.0.00.0030.0179.95
4.4.90.0030.0209.95
4.4.80.0000.0189.95
4.4.70.0020.0179.95
4.4.60.0020.0189.95
4.4.50.0000.0209.95
4.4.40.0030.0279.95
4.4.30.0030.0179.95
4.4.20.0020.0089.95
4.4.10.0050.0079.95
4.4.00.0000.0179.95
4.3.110.0020.0089.95
4.3.100.0040.0109.95
4.3.90.0020.0089.95
4.3.80.0060.0119.95
4.3.70.0050.0089.95
4.3.60.0050.0079.95
4.3.50.0000.0119.95
4.3.40.0050.0109.95
4.3.30.0020.0119.95
4.3.20.0030.0079.95
4.3.10.0040.0059.95
4.3.00.0000.0099.95

preferences:
53.99 ms | 401 KiB | 5 Q