3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var = 'abcdefg'; $str = substr($var, 0, count($var) - 2);

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)
8.3.60.0180.00316.75
8.3.50.0140.00416.27
8.3.40.0060.00918.84
8.3.30.0140.00018.48
8.3.20.0000.00820.21
8.3.10.0040.00423.65
8.3.00.0000.00717.66
8.2.180.0110.00316.50
8.2.170.0110.00322.96
8.2.160.0100.00720.43
8.2.150.0040.00425.66
8.2.140.0070.00024.66
8.2.130.0040.00422.25
8.2.120.0030.00626.35
8.2.110.0050.00520.54
8.2.100.0000.01217.58
8.2.90.0060.00319.16
8.2.80.0000.00917.97
8.2.70.0040.00417.63
8.2.60.0030.00517.93
8.2.50.0060.00318.10
8.2.40.0030.00620.59
8.2.30.0040.00421.11
8.2.20.0040.00417.99
8.2.10.0030.00518.11
8.2.00.0050.00218.16
8.1.280.0120.00325.92
8.1.270.0040.00424.01
8.1.260.0000.00726.35
8.1.250.0070.00028.09
8.1.240.0060.00323.84
8.1.230.0070.00319.04
8.1.220.0020.00517.74
8.1.210.0030.00618.77
8.1.200.0060.00317.48
8.1.190.0100.00017.35
8.1.180.0000.00818.10
8.1.170.0000.00918.64
8.1.160.0040.00419.03
8.1.150.0070.00020.67
8.1.140.0070.00019.67
8.1.130.0050.00218.73
8.1.120.0070.00017.39
8.1.110.0000.00717.46
8.1.100.0040.00417.40
8.1.90.0050.00317.43
8.1.80.0000.00717.37
8.1.70.0000.00717.48
8.1.60.0000.00917.49
8.1.50.0030.00517.52
8.1.40.0040.00417.41
8.1.30.0000.00717.53
8.1.20.0040.00417.68
8.1.10.0080.00017.59
8.1.00.0080.00017.52
8.0.300.0000.00718.77
8.0.290.0070.00016.75
8.0.280.0070.00018.24
8.0.270.0070.00017.21
8.0.260.0000.00716.78
8.0.250.0040.00416.82
8.0.240.0040.00416.91
8.0.230.0060.00316.84
8.0.220.0000.00716.90
8.0.210.0000.00716.91
8.0.200.0070.00016.95
8.0.190.0070.00316.83
8.0.180.0030.00616.95
8.0.170.0030.00517.00
8.0.160.0030.00516.90
8.0.150.0050.00316.85
8.0.140.0060.00316.88
8.0.130.0030.00313.29
8.0.120.0040.00416.91
8.0.110.0030.00416.84
8.0.100.0050.00216.98
8.0.90.0000.00716.81
8.0.80.0140.00316.84
8.0.70.0000.00717.00
8.0.60.0000.00816.88
8.0.50.0040.00416.82
8.0.30.0110.00717.08
8.0.20.0150.00917.40
8.0.10.0040.00416.92
8.0.00.0100.00716.95
7.4.330.0050.00015.55
7.4.320.0040.00416.48
7.4.300.0030.00316.48
7.4.290.0060.00016.63
7.4.280.0000.00716.63
7.4.270.0000.00716.41
7.4.260.0050.00013.27
7.4.250.0070.00016.44
7.4.240.0070.00016.64
7.4.230.0040.00416.66
7.4.220.0120.01516.49
7.4.210.0090.00616.55
7.4.200.0030.00516.58
7.4.160.0090.00716.46
7.4.150.0080.00917.40
7.4.140.0100.00717.86
7.4.130.0170.00916.61
7.4.120.0070.01116.54
7.4.110.0070.01016.54
7.4.100.0110.00716.33
7.4.90.0160.00716.43
7.4.80.0140.00619.39
7.4.70.0110.01116.34
7.4.60.0070.01316.32
7.4.50.0090.00616.49
7.4.40.0060.01216.39
7.4.30.0040.01216.56
7.4.10.0060.01014.90
7.4.00.0090.00914.92
7.3.330.0030.00313.30
7.3.320.0030.00313.29
7.3.310.0000.00716.25
7.3.300.0000.00616.28
7.3.290.0050.00916.34
7.3.280.0080.01016.30
7.3.270.0140.00317.40
7.3.260.0050.01216.38
7.3.250.0100.01016.39
7.3.240.0100.00716.24
7.3.230.0090.00816.46
7.3.210.0100.00616.36
7.3.200.0060.01016.29
7.3.190.0140.00316.37
7.3.180.0100.00616.31
7.3.170.0090.00616.27
7.3.160.0060.01016.37
7.3.130.0030.01614.80
7.3.120.0060.01314.95
7.3.110.0130.00614.64
7.3.100.0040.00414.58
7.3.90.0100.00315.00
7.3.80.0060.00614.79
7.3.70.0120.00314.84
7.3.60.0090.00314.80
7.3.50.0040.01114.76
7.3.40.0070.00714.60
7.3.30.0030.00914.47
7.3.20.0000.01116.84
7.3.10.0070.00716.53
7.3.00.0120.00616.61
7.2.330.0150.00916.58
7.2.320.0120.01216.51
7.2.310.0040.01316.65
7.2.300.0090.00916.61
7.2.290.0110.01116.44
7.2.260.0100.01015.11
7.2.250.0110.00715.24
7.2.240.0100.00715.12
7.2.230.0030.01014.89
7.2.220.0040.01115.09
7.2.210.0000.01315.28
7.2.200.0080.00415.11
7.2.190.0070.01015.00
7.2.180.0070.01015.07
7.2.170.0000.01115.02
7.2.160.0000.01314.64
7.2.150.0090.00616.84
7.2.140.0060.00917.05
7.2.130.0090.00516.90
7.2.120.0060.01016.94
7.2.110.0050.01016.85
7.2.100.0020.01216.72
7.2.90.0060.00616.78
7.2.80.0070.00716.69
7.2.70.0070.00716.70
7.2.60.0030.01016.77
7.2.50.0080.00616.74
7.2.40.0040.01116.85
7.2.30.0070.00716.91
7.2.20.0040.00916.93
7.2.10.0100.00516.78
7.2.00.0060.00817.59
7.1.330.0040.01115.50
7.1.320.0030.01015.70
7.1.310.0080.00615.63
7.1.300.0000.01515.47
7.1.290.0060.01015.61
7.1.280.0030.00615.86
7.1.270.0040.00815.73
7.1.260.0030.01015.86
7.1.250.0100.00315.71
7.1.240.0070.00715.64
7.1.230.0030.00815.84
7.1.220.0060.00615.65
7.1.210.0040.00815.57
7.1.200.0090.00315.72
7.1.190.0070.00715.71
7.1.180.0100.00515.43
7.1.170.0030.00915.63
7.1.160.0020.01215.79
7.1.150.0080.00615.59
7.1.140.0080.00315.59
7.1.130.0090.00315.59
7.1.120.0030.00815.83
7.1.110.0080.00515.71
7.1.100.0080.00516.41
7.1.90.0100.00315.90
7.1.80.0100.00515.89
7.1.70.0920.01015.32
7.1.60.0710.01321.42
7.1.50.0880.00721.41
7.1.40.0960.01121.42
7.1.30.1140.00921.36
7.1.20.0660.01121.38
7.1.10.0620.00715.27
7.1.00.0720.00815.37
7.0.330.0030.01015.23
7.0.320.0070.00915.30
7.0.310.0050.00715.44
7.0.300.0070.00715.27
7.0.290.0130.00215.32
7.0.280.0070.00615.30
7.0.270.0050.00615.43
7.0.260.0060.00615.39
7.0.250.0100.00315.40
7.0.240.0100.00415.33
7.0.230.0080.00515.40
7.0.220.0100.00515.25
7.0.210.0060.00815.35
7.0.200.0830.01015.24
7.0.190.1010.00915.19
7.0.180.1010.00914.97
7.0.170.1160.00715.11
7.0.160.0810.00314.96
7.0.150.0560.00614.94
7.0.140.0770.00614.94
7.0.130.0730.00815.05
7.0.120.0770.01015.04
7.0.110.0640.01014.93
7.0.100.0630.01215.18
7.0.90.0630.00715.15
7.0.80.0930.01015.08
7.0.70.0590.00914.86
7.0.60.0590.00715.02
7.0.50.0750.00615.19
7.0.40.0670.01013.76
7.0.30.0540.00913.81
7.0.20.0600.01013.69
7.0.10.0510.01213.80
7.0.00.0590.01013.87
5.6.400.0060.00614.51
5.6.390.0060.00614.51
5.6.380.0040.00914.33
5.6.370.0070.00714.08
5.6.360.0000.01414.20
5.6.350.0070.00714.26
5.6.340.0030.00614.61
5.6.330.0040.00714.32
5.6.320.0090.00614.38
5.6.310.0060.00914.50
5.6.300.0050.00813.84
5.6.290.0070.00414.19
5.6.280.0030.00914.32
5.6.270.0070.01314.19
5.6.260.0070.00714.29
5.6.250.0030.01014.39
5.6.240.0150.00014.09
5.6.230.0000.01314.06
5.6.220.0030.01014.15
5.6.210.0060.00314.45
5.6.200.0070.00414.48
5.6.190.0030.01014.04
5.6.180.0060.00314.30
5.6.170.0030.01013.91
5.6.160.0160.00014.19
5.6.150.0110.00314.32
5.6.140.0130.00314.10
5.6.130.0060.00914.59
5.6.120.0060.00614.55
5.6.110.0000.01814.22
5.6.100.0060.01214.09
5.6.90.0070.01114.49
5.6.80.0030.01614.18
5.6.70.0040.00814.24
5.6.60.0040.01214.00
5.6.50.0070.01014.15
5.6.40.0100.00313.97
5.6.30.0110.00314.05
5.6.20.0080.00814.28
5.6.10.0070.00714.04
5.6.00.0040.01114.04

preferences:
40.94 ms | 401 KiB | 5 Q