3v4l.org

run code in 300+ PHP versions simultaneously
<?php $c = 'déjà'; // skipped tests var_dump('jà' === grapheme_substr($c, -2, 3)); var_dump("" === grapheme_substr($c, -1, 0) ); var_dump(false === grapheme_substr($c, 1, -4) ); // issued part var_dump('à' === grapheme_substr('éà', 1, -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)
8.3.70.0150.00417.50
8.3.60.0070.01419.18
8.3.50.0090.01021.65
8.3.40.0130.00319.58
8.3.30.0160.00619.72
8.3.20.0030.00521.16
8.3.10.0000.00822.60
8.3.00.0080.00020.56
8.2.190.0030.01717.88
8.2.180.0120.00619.52
8.2.170.0140.00422.96
8.2.160.0140.00021.39
8.2.150.0050.00324.18
8.2.140.0000.00824.66
8.2.130.0030.00526.16
8.2.120.0120.00018.38
8.2.110.0100.00023.07
8.2.100.0040.00820.36
8.2.90.0080.00020.08
8.2.80.0090.00018.50
8.2.70.0040.00418.50
8.2.60.0040.00418.90
8.2.50.0040.00418.63
8.2.40.0040.00420.17
8.2.30.0040.00423.34
8.2.20.0000.00818.69
8.2.10.0080.00019.08
8.2.00.0030.00519.07
8.1.280.0080.01125.92
8.1.270.0030.01023.21
8.1.260.0070.00326.35
8.1.250.0040.00428.09
8.1.240.0060.00323.53
8.1.230.0040.00818.23
8.1.220.0050.00318.66
8.1.210.0030.00618.77
8.1.200.0060.00318.23
8.1.190.0000.00818.11
8.1.180.0040.00418.41
8.1.170.0050.00319.26
8.1.160.0080.00023.02
8.1.150.0060.00319.84
8.1.140.0030.00518.41
8.1.130.0070.00018.66
8.1.120.0000.00718.36
8.1.110.0000.00718.21
8.1.100.0030.00518.38
8.1.90.0000.00718.49
8.1.80.0000.00718.27
8.1.70.0030.00518.29
8.1.60.0040.00418.54
8.1.50.0040.00418.46
8.1.40.0040.00418.49
8.1.30.0030.00518.66
8.1.20.0000.00818.65
8.1.10.0040.00418.57
8.1.00.0000.00718.23
8.0.300.0020.00518.77
8.0.290.0040.00417.38
8.0.280.0000.00819.33
8.0.270.0000.00818.27
8.0.260.0030.00318.08
8.0.250.0040.00417.64
8.0.240.0080.00017.57
8.0.230.0070.00017.74
8.0.220.0040.00417.66
8.0.210.0000.00717.66
8.0.200.0030.00717.71
8.0.190.0040.00417.75
8.0.180.0040.00417.63
8.0.170.0030.00617.69
8.0.160.0030.00317.80
8.0.150.0000.00717.68
8.0.140.0040.00417.57
8.0.130.0000.00513.29
8.0.120.0000.00817.82
8.0.110.0070.00017.93
8.0.100.0060.00317.79
8.0.90.0050.00217.78
8.0.80.0060.00917.84
8.0.70.0000.00717.85
8.0.60.0000.00717.60
8.0.50.0040.00417.74
8.0.30.0110.00717.99
8.0.20.0080.01018.12
8.0.10.0070.00017.70
8.0.00.0080.01017.68
7.4.330.0060.00015.08
7.4.320.0040.00417.56
7.4.300.0050.00217.52
7.4.290.0030.00317.52
7.4.280.0000.00917.55
7.4.270.0030.00317.53
7.4.260.0030.00317.25
7.4.250.0040.00417.50
7.4.240.0030.00517.46
7.4.230.0030.00317.65
7.4.220.0100.01017.64
7.4.210.0090.00617.38
7.4.200.0080.00017.38
7.4.160.0080.00817.59
7.4.150.0110.00717.40
7.4.140.0130.01117.86
7.4.130.0050.01317.41
7.4.120.0120.00817.37
7.4.110.0060.01217.22
7.4.100.0070.01717.35
7.4.90.0030.01517.28
7.4.80.0080.00919.39
7.4.70.0000.01717.37
7.4.60.0160.00317.53
7.4.50.0090.00017.19
7.4.40.0060.01117.26
7.4.30.0080.00817.52
7.4.00.0070.01015.90
7.3.330.0060.00013.15
7.3.320.0060.00013.09
7.3.310.0000.00717.33
7.3.300.0020.00517.14
7.3.290.0080.00617.18
7.3.280.0070.01217.19
7.3.270.0100.01017.63
7.3.260.0090.00917.50
7.3.250.0100.00717.33
7.3.240.0130.00317.61
7.3.230.0070.01117.48
7.3.210.0060.01217.47
7.3.200.0090.01517.56
7.3.190.0100.01017.41
7.3.180.0090.00617.32
7.3.170.0110.01417.36
7.3.160.0090.00917.27
7.2.330.0090.00917.44
7.2.320.0060.01117.26
7.2.310.0030.01917.56
7.2.300.0060.01917.20
7.2.290.0080.00817.36
7.2.60.0000.01517.59
7.2.00.0040.01120.16
7.1.200.0030.00716.62
7.1.100.0120.00319.02
7.1.70.0000.00818.17
7.1.60.0060.01319.19
7.1.50.0040.00717.94
7.1.00.0030.07323.55
7.0.200.0090.00017.98
7.0.60.0030.04720.89
7.0.50.0100.08017.85
7.0.40.0130.08021.21
7.0.30.0330.07321.03
7.0.20.0270.08020.91
7.0.10.0330.07320.84
7.0.00.0100.05321.01
5.6.280.0100.06721.78
5.6.210.0070.08021.45
5.6.200.0070.08018.15
5.6.190.0030.09021.31
5.6.180.0200.06721.37
5.6.170.0130.05721.25
5.6.160.0000.04721.39
5.6.150.0100.03318.09
5.6.140.0030.04018.22
5.6.130.0030.04718.07
5.6.120.0100.03721.94
5.6.110.0070.04021.93
5.6.100.0100.07321.79
5.6.90.0100.07721.90
5.6.80.0070.08021.30
5.6.70.0130.07321.44
5.5.350.0130.07021.23
5.5.340.0070.05317.88
5.5.330.0100.07721.09
5.5.320.0130.07321.20
5.5.310.0270.06321.22
5.5.300.0030.04317.91
5.5.290.0100.07017.95
5.5.280.0130.08321.68
5.5.270.0130.04721.64
5.5.260.0100.07721.65
5.5.250.0000.09021.58
5.5.240.0000.08321.05
5.4.450.1230.00020.00
5.4.440.1130.00020.33
5.4.430.1170.00020.38
5.4.420.1070.00020.36
5.4.410.1200.00020.03
5.4.400.1200.00019.91
5.4.390.1170.00020.02
5.4.380.1300.00019.67
5.4.370.1170.00019.60
5.4.360.1370.00019.84
5.4.350.1230.00020.08
5.4.340.1230.00019.90
5.4.320.1200.00019.87
5.4.310.1200.00019.68
5.4.300.1270.00019.63
5.4.290.1070.00019.67
5.4.280.1270.00019.45
5.4.270.1200.00019.86
5.4.260.1000.00020.04
5.4.250.1070.00019.71
5.4.240.1070.00019.68
5.4.230.1070.00019.68
5.4.220.1300.00019.59
5.4.210.1130.00020.05
5.4.200.1030.00019.67
5.4.190.1030.00019.69
5.4.180.1130.00019.67
5.4.170.1070.00019.58
5.4.160.1230.00019.83
5.4.150.1300.00019.45
5.4.140.1200.00017.21
5.4.130.1200.00016.91
5.4.120.1200.00017.11
5.4.110.1330.00017.37
5.4.100.1170.00017.37
5.4.90.1170.00017.07
5.4.80.1070.00016.97
5.4.70.0000.07317.15
5.4.60.0070.06317.19
5.4.50.0030.07017.04
5.4.40.0070.04017.19
5.4.30.0030.06717.20
5.4.20.0370.05317.00
5.4.10.0300.05017.18

preferences:
48.94 ms | 401 KiB | 5 Q