3v4l.org

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

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)
8.3.60.0090.01616.63
8.3.50.0130.00421.94
8.3.40.0110.00318.69
8.3.30.0080.00619.07
8.3.20.0040.00420.35
8.3.10.0000.00823.48
8.3.00.0040.00420.93
8.2.180.0110.01118.43
8.2.170.0070.00722.96
8.2.160.0100.00320.43
8.2.150.0080.00024.18
8.2.140.0040.00424.66
8.2.130.0070.00026.16
8.2.120.0040.00419.36
8.2.110.0050.00522.29
8.2.100.0080.00417.66
8.2.90.0030.00619.07
8.2.80.0050.00317.97
8.2.70.0060.00517.50
8.2.60.0000.00817.80
8.2.50.0090.00018.07
8.2.40.0030.00519.94
8.2.30.0040.00418.09
8.2.20.0030.00517.68
8.2.10.0000.00718.04
8.2.00.0070.00017.72
8.1.280.0140.00725.92
8.1.270.0000.01022.14
8.1.260.0040.00426.35
8.1.250.0080.00028.09
8.1.240.0030.00623.80
8.1.230.0040.00817.42
8.1.220.0030.00617.74
8.1.210.0040.00418.77
8.1.200.0030.00817.35
8.1.190.0000.00817.36
8.1.180.0060.00318.10
8.1.170.0050.00518.50
8.1.160.0040.00421.91
8.1.150.0050.00218.62
8.1.140.0040.00417.30
8.1.130.0000.00719.52
8.1.120.0000.00717.42
8.1.110.0040.00417.25
8.1.100.0000.00817.43
8.1.90.0040.00417.41
8.1.80.0050.00217.32
8.1.70.0040.00417.28
8.1.60.0060.00317.52
8.1.50.0030.00517.50
8.1.40.0040.00417.46
8.1.30.0030.00617.68
8.1.20.0030.00617.58
8.1.10.0080.00017.62
8.1.00.0020.00517.47
8.0.300.0000.00718.77
8.0.290.0070.00016.63
8.0.280.0040.00418.38
8.0.270.0040.00417.19
8.0.260.0030.00317.20
8.0.250.0070.00016.99
8.0.240.0000.00817.00
8.0.230.0000.00716.97
8.0.220.0000.00716.96
8.0.210.0060.00016.77
8.0.200.0000.00716.96
8.0.190.0030.00516.86
8.0.180.0070.00016.97
8.0.170.0000.00816.81
8.0.160.0000.00816.94
8.0.150.0030.00616.86
8.0.140.0030.00516.86
8.0.130.0000.00513.38
8.0.120.0030.00516.84
8.0.110.0000.00716.84
8.0.100.0000.00816.75
8.0.90.0030.00616.86
8.0.80.0040.01116.84
8.0.70.0040.00416.83
8.0.60.0000.00816.80
8.0.50.0070.00016.87
8.0.30.0120.00917.02
8.0.20.0170.00217.40
8.0.10.0000.00816.96
8.0.00.0120.00616.66
7.4.330.0020.00215.09
7.4.320.0070.00016.41
7.4.300.0030.00316.38
7.4.290.0070.00016.44
7.4.280.0040.00416.47
7.4.270.0070.00016.58
7.4.260.0000.00716.45
7.4.250.0040.00416.48
7.4.240.0000.00716.56
7.4.230.0000.00816.56
7.4.220.0030.01416.63
7.4.210.0070.00716.36
7.4.200.0000.00716.34
7.4.160.0080.00816.48
7.4.150.0130.01317.40
7.4.140.0140.00517.86
7.4.130.0060.01116.56
7.4.120.0110.00716.57
7.4.110.0140.00316.48
7.4.100.0100.01016.46
7.4.90.0050.01116.58
7.4.80.0130.01019.39
7.4.70.0070.01016.51
7.4.60.0110.00716.44
7.4.50.0030.00616.40
7.4.40.0110.00616.74
7.4.30.0100.01316.49
7.4.00.0070.01015.01
7.3.330.0030.00513.13
7.3.320.0030.00313.21
7.3.310.0000.00716.37
7.3.300.0030.00316.28
7.3.290.0140.00416.35
7.3.280.0080.01016.40
7.3.270.0110.00717.40
7.3.260.0130.00316.46
7.3.250.0130.01016.31
7.3.240.0150.00316.44
7.3.230.0110.00516.39
7.3.210.0130.00316.43
7.3.200.0030.01319.39
7.3.190.0100.01316.40
7.3.180.0090.00616.26
7.3.170.0140.00716.42
7.3.160.0080.00816.43
7.3.120.0130.00314.81
7.3.00.0040.00816.38
7.2.330.0100.00616.61
7.2.320.0160.00616.42
7.2.310.0100.00716.38
7.2.300.0060.01216.53
7.2.290.0130.00316.66
7.2.130.0040.01116.64
7.2.120.0000.00816.71
7.2.110.0070.00716.57
7.2.100.0060.00616.56
7.2.90.0110.00316.69
7.2.80.0040.01216.69
7.2.70.0100.00716.68
7.2.60.0080.00616.63
7.2.50.0100.00316.86
7.2.40.0030.01016.93
7.2.30.0000.01216.94
7.2.20.0110.00316.83
7.2.10.0030.00916.75
7.2.00.0070.00718.26
7.1.250.0070.00415.95
7.1.240.0100.00315.52
7.1.230.0060.00615.45
7.1.220.0000.01215.64
7.1.210.0030.00615.74
7.1.200.0020.00915.70
7.1.190.0110.00015.75
7.1.180.0040.00416.02
7.1.170.0000.01015.65
7.1.160.0000.00815.57
7.1.150.0040.00415.42
7.1.140.0060.00315.63
7.1.130.0040.01115.91
7.1.120.0110.00415.72
7.1.110.0000.01315.82
7.1.100.0060.00616.74
7.1.90.0000.00915.90
7.1.80.0030.01215.82
7.1.70.0050.01016.31
7.1.60.0030.01617.57
7.1.50.0090.00816.29
7.1.40.0080.00415.80
7.1.30.0060.00615.81
7.1.20.0070.00715.79
7.1.10.0070.00415.83
7.1.00.0070.04019.01
7.0.330.0030.00715.28
7.0.320.0030.00615.05
7.0.310.0000.01315.01
7.0.300.0030.00715.55
7.0.290.0070.00715.28
7.0.280.0050.00215.23
7.0.270.0040.01115.44
7.0.260.0000.00915.39
7.0.250.0110.00415.40
7.0.240.0000.01315.18
7.0.230.0030.01015.20
7.0.220.0030.00615.23
7.0.210.0090.00315.46
7.0.200.0070.00315.86
7.0.190.0070.00715.31
7.0.180.0040.01115.07
7.0.170.0000.00915.18
7.0.160.0100.00315.48
7.0.150.0060.00615.29
7.0.140.0050.03718.79
7.0.130.0070.00715.48
7.0.120.0030.00715.27
7.0.110.0200.03017.58
7.0.100.0150.04018.62
7.0.90.0030.02318.68
7.0.80.0050.03618.59
7.0.70.0070.04318.54
7.0.60.0090.03818.39
7.0.50.0050.03718.56
7.0.40.0110.02816.54
7.0.30.0020.03216.66
7.0.20.0020.02416.39
7.0.10.0080.03316.52
7.0.00.0050.03716.51
5.6.380.0070.00414.50
5.6.370.0030.01214.53
5.6.360.0060.00914.09
5.6.350.0040.00813.96
5.6.340.0090.00014.38
5.6.330.0030.00713.79
5.6.320.0000.01314.26
5.6.310.0060.00614.28
5.6.300.0080.00014.28
5.6.290.0040.01114.04
5.6.280.0020.04317.78
5.6.270.0090.00614.01
5.6.260.0050.02517.57
5.6.250.0020.02417.53
5.6.240.0050.02617.36
5.6.230.0020.04117.32
5.6.220.0060.02617.40
5.6.210.0030.02417.46
5.6.200.0070.03217.40
5.6.190.0030.02417.26
5.6.180.0050.02717.38
5.6.170.0060.02817.35
5.6.160.0050.02517.29
5.6.150.0090.02017.46
5.6.140.0030.04317.29
5.6.130.0070.03617.47
5.6.120.0050.02217.41
5.6.110.0050.02517.45
5.6.100.0040.02317.31
5.6.90.0100.02717.34
5.6.80.0040.04116.90
5.6.70.0090.04217.03
5.6.60.0030.02516.88
5.6.50.0030.02816.91
5.6.40.0020.03916.94
5.6.30.0050.02216.98
5.6.20.0080.02116.94
5.6.10.0110.01616.94
5.6.00.0050.02416.98
5.5.380.0060.03514.21
5.5.370.0050.03114.32
5.5.360.0030.03714.20
5.5.350.0020.03614.27
5.5.340.0020.02514.50
5.5.330.0070.02214.64
5.5.320.0020.03314.15
5.5.310.0040.02214.32
5.5.300.0030.02914.51
5.5.290.0020.02314.46
5.5.280.0030.03414.35
5.5.270.0030.02214.34
5.5.260.0020.02514.62
5.5.250.0100.01714.34
5.5.240.0030.02314.03
5.5.230.0030.02314.20
5.5.220.0050.02714.20
5.5.210.0020.02414.11
5.5.200.0080.01814.04
5.5.190.0050.03114.23
5.5.180.0100.01714.08
5.5.170.0000.01010.99
5.5.160.0050.02014.17
5.5.150.0040.02214.01
5.5.140.0030.03414.16
5.5.130.0040.02014.10
5.5.120.0030.02114.25
5.5.110.0050.02014.22
5.5.100.0060.02213.86
5.5.90.0070.02514.08
5.5.80.0050.02814.07
5.5.70.0030.02314.05
5.5.60.0080.01613.99
5.5.50.0080.02314.18
5.5.40.0020.03314.00
5.5.30.0020.03113.97
5.5.20.0040.02814.08
5.5.10.0050.04014.01
5.5.00.0030.02013.88
5.4.450.0020.02515.16
5.4.440.0050.03115.14
5.4.430.0030.02315.17
5.4.420.0110.01415.19
5.4.410.0080.02515.19
5.4.400.0020.02314.90
5.4.390.0080.03314.99
5.4.380.0050.03014.86
5.4.370.0000.02415.00
5.4.360.0100.01814.87
5.4.350.0100.02514.98
5.4.340.0060.01814.95
5.4.330.0030.00710.88
5.4.320.0040.02414.79
5.4.310.0050.02215.01
5.4.300.0030.03115.00
5.4.290.0110.01714.98
5.4.280.0050.02314.89
5.4.270.0020.02514.98
5.4.260.0060.02514.80
5.4.250.0060.03515.06
5.4.240.0050.02114.85
5.4.230.0030.02614.91
5.4.220.0020.02514.84
5.4.210.0030.02315.00
5.4.200.0020.02015.06
5.4.190.0070.02414.91
5.4.180.0020.02014.93
5.4.170.0010.02014.91
5.4.160.0050.03814.90
5.4.150.0070.04214.86
5.4.140.0060.02513.44
5.4.130.0050.01813.66
5.4.120.0020.02713.77
5.4.110.0050.02313.72
5.4.100.0080.01813.61
5.4.90.0030.02113.49
5.4.80.0050.01813.59
5.4.70.0020.02113.55
5.4.60.0060.01613.75
5.4.50.0030.01813.52
5.4.40.0080.01813.68
5.4.30.0060.02213.70
5.4.20.0050.01713.68
5.4.10.0030.02213.41
5.4.00.0050.01713.24
5.3.290.0060.02112.51
5.3.280.0050.02212.37
5.3.270.0030.01812.43
5.3.260.0000.02412.51
5.3.250.0020.02912.50
5.3.240.0040.03712.41
5.3.230.0020.02612.43
5.3.220.0050.02612.46
5.3.210.0070.01812.45
5.3.200.0020.02312.39
5.3.190.0050.02012.41
5.3.180.0050.02012.47
5.3.170.0070.02012.45
5.3.160.0020.02012.50
5.3.150.0050.02012.49
5.3.140.0000.02012.56
5.3.130.0080.01812.45
5.3.120.0030.01712.43
5.3.110.0000.02212.57
5.3.100.0050.02012.18
5.3.90.0020.02012.25
5.3.80.0030.01812.08
5.3.70.0060.01312.04
5.3.60.0020.02012.12
5.3.50.0030.02112.06
5.3.40.0020.01812.16
5.3.30.0020.02112.09
5.3.20.0050.01611.94
5.3.10.0000.02011.88
5.3.00.0070.01311.95
5.2.170.0030.01310.78
5.2.160.0010.01810.68
5.2.150.0020.01610.65
5.2.140.0000.01810.67
5.2.130.0060.01210.64
5.2.120.0010.01610.64
5.2.110.0050.01710.63
5.2.100.0020.01710.57
5.2.90.0030.01310.63
5.2.80.0020.01510.75
5.2.70.0050.01610.63
5.2.60.0030.01510.59
5.2.50.0030.01510.58
5.2.40.0000.01810.58
5.2.30.0020.01610.59
5.2.20.0000.01610.64
5.2.10.0020.01310.55
5.2.00.0020.01610.51
5.1.60.0040.01210.12
5.1.50.0030.01210.15
5.1.40.0040.01010.11
5.1.30.0030.01510.32
5.1.20.0020.01410.28
5.1.10.0000.01610.13
5.1.00.0050.01210.14
5.0.50.0000.0129.78
5.0.40.0020.0109.78
5.0.30.0030.0139.78
5.0.20.0050.0089.78
5.0.10.0020.0139.78
5.0.00.0030.0159.78
4.4.90.0000.0099.78
4.4.80.0010.0089.78
4.4.70.0020.0099.78
4.4.60.0000.0099.78
4.4.50.0000.0109.78
4.4.40.0020.0129.78
4.4.30.0020.0089.78
4.4.20.0030.0089.78
4.4.10.0030.0089.78
4.4.00.0000.0149.78
4.3.110.0030.0059.78
4.3.100.0050.0059.78
4.3.90.0020.0079.78
4.3.80.0010.0119.78
4.3.70.0020.0089.78
4.3.60.0050.0069.78
4.3.50.0000.0099.78
4.3.40.0000.0139.78
4.3.30.0020.0109.78
4.3.20.0020.0089.78
4.3.10.0000.0099.78
4.3.00.0050.0109.78

preferences:
33.81 ms | 401 KiB | 5 Q