3v4l.org

run code in 300+ PHP versions simultaneously
<?php function rev($str) { return $str ? rev($str,1) : ""; } $txt = "Thomas"; echo rev($txt);

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)
8.3.60.0630.02072.25
8.3.50.0630.02673.98
8.3.40.0310.00944.89
8.3.30.0360.00444.67
8.3.20.0150.00646.41
8.3.10.0100.01048.77
8.3.00.0080.00647.17
8.2.180.0600.01374.16
8.2.170.0400.01744.88
8.2.160.0220.01946.53
8.2.150.0150.00744.66
8.2.140.0270.00046.39
8.2.130.0140.01043.50
8.2.120.0100.00349.91
8.2.110.0160.02248.66
8.2.100.0210.01043.91
8.2.90.0140.00745.27
8.2.80.0200.00043.38
8.2.70.0100.01343.25
8.2.60.0140.00743.68
8.2.50.0170.00743.50
8.2.40.0160.01045.14
8.2.30.0070.01346.62
8.2.20.0210.00443.45
8.2.10.0060.01343.79
8.2.00.0200.00743.96
8.1.280.0860.02173.02
8.1.270.0160.00449.66
8.1.260.0140.01148.07
8.1.250.0190.00448.14
8.1.240.0150.00949.04
8.1.230.0200.01345.04
8.1.220.0200.00043.66
8.1.210.0070.01343.54
8.1.200.0100.01043.23
8.1.190.0150.00943.39
8.1.180.0110.01143.28
8.1.170.0110.01144.78
8.1.160.0180.00348.00
8.1.150.0070.01444.84
8.1.140.0220.00345.51
8.1.130.0110.00743.51
8.1.120.0070.01743.34
8.1.110.0130.01043.44
8.1.100.0070.01343.41
8.1.90.0160.00743.44
8.1.80.0100.01043.36
8.1.70.0130.00743.48
8.1.60.0140.01143.61
8.1.50.0170.01043.58
8.1.40.0200.00743.57
8.1.30.0140.01443.57
8.1.20.0080.01543.63
8.1.10.0310.01473.17
8.1.00.0290.01473.07
8.0.300.0250.00773.09
8.0.290.0270.01072.25
8.0.280.0270.02073.97
8.0.270.0360.00772.78
8.0.260.0320.00672.79
8.0.250.0290.00772.38
8.0.240.0170.01772.26
8.0.230.0270.01372.39
8.0.220.0230.01672.37
8.0.210.0340.01072.30
8.0.200.0210.02072.36
8.0.190.0330.02072.27
8.0.180.0240.01072.45
8.0.170.0350.01172.48
8.0.160.0160.01672.37
8.0.150.0190.01372.41
8.0.140.0330.01072.28
8.0.130.0470.030121.69
8.0.120.0230.01372.30
8.0.110.0170.01772.39
8.0.100.0310.00372.29
8.0.90.0250.01172.36
8.0.80.0400.03772.40
8.0.70.0250.00972.33
8.0.60.0140.02172.39
8.0.50.0230.01372.21
8.0.30.0560.02872.58
8.0.20.0860.04472.51
8.0.10.0270.00772.50
8.0.00.0540.03172.32
7.4.330.0290.01071.37
7.4.320.0130.02072.05
7.4.300.0200.01471.99
7.4.290.0170.01772.11
7.4.280.0210.01772.13
7.4.270.0170.01772.09
7.4.260.0200.01772.04
7.4.250.0280.01372.07
7.4.240.0240.01272.07
7.4.230.0260.00671.94
7.4.220.0650.03672.02
7.4.210.0540.03472.06
7.4.200.0250.00972.00
7.4.160.0400.05371.91
7.4.150.0460.05272.05
7.4.140.0690.03971.96
7.4.130.0760.03671.97
7.4.120.0560.03372.06
7.4.110.0430.03771.96
7.4.100.0660.02772.03
7.4.90.0530.03671.85
7.4.80.0550.05571.99
7.4.70.0420.04672.00
7.4.60.0690.01772.09
7.4.50.0230.03071.83
7.4.40.0580.05171.93
7.4.30.0550.05572.04
7.4.00.0230.02770.52
7.3.330.0660.017121.58
7.3.320.0390.032121.68
7.3.310.0200.02071.78
7.3.300.0290.00671.70
7.3.290.0220.01171.61
7.3.280.0820.03971.73
7.3.270.0520.03571.88
7.3.260.0540.02671.89
7.3.250.0640.03171.87
7.3.240.0530.03571.89
7.3.230.0670.02072.14
7.3.210.0470.03471.79
7.3.200.0570.02771.80
7.3.190.0540.03271.77
7.3.180.0480.03571.82
7.3.170.0480.04172.06
7.3.160.0430.04071.78
7.2.330.0770.01772.04
7.2.320.0550.03672.13
7.2.310.0630.01972.23
7.2.300.0650.03071.71
7.2.290.0600.04671.87
7.2.110.0610.02678.35
7.2.100.0560.02078.30
7.2.90.0350.02178.37
7.2.80.0790.01378.43
7.2.70.0620.01878.22
7.2.60.1430.01078.62
7.2.50.0700.01178.54
7.2.40.0900.03078.48
7.2.30.0390.02078.66
7.2.20.0460.01778.82
7.2.10.2690.01078.77
7.2.00.5310.01879.95
7.1.230.0650.02177.38
7.1.220.0930.01477.83
7.1.210.0710.01877.64
7.1.200.0720.01677.77
7.1.190.0520.01677.78
7.1.180.0830.01577.41
7.1.170.0650.02377.33
7.1.160.0600.01377.57
7.1.150.1170.01677.73
7.1.140.0710.01977.75
7.1.130.0120.02077.35
7.1.120.1220.01077.73
7.1.110.0480.01777.76
7.1.100.5780.01875.67
7.1.90.2790.02277.87
7.1.80.0170.02077.83
7.1.70.1660.03078.44
7.1.60.0170.02978.50
7.1.50.0360.00878.04
7.1.40.0480.01077.89
7.1.30.0900.01677.60
7.1.20.0680.02577.82
7.1.10.2430.02477.78
7.1.00.0550.05780.91
7.0.310.1060.01077.13
7.0.300.1130.01077.00
7.0.290.0830.01077.07
7.0.280.0690.01077.40
7.0.270.0200.02077.61
7.0.260.0220.01377.21
7.0.250.0820.01677.52
7.0.240.3320.01377.38
7.0.230.0100.02777.52
7.0.220.0160.02577.43
7.0.210.2160.00777.52
7.0.200.5140.02276.44
7.0.190.2770.00777.43
7.0.180.1120.01477.32
7.0.170.0290.01377.30
7.0.160.0220.02277.21
7.0.150.0250.01377.50
7.0.140.0290.02977.43
7.0.130.0140.01777.22
7.0.120.2350.01677.11
7.0.110.0390.01877.27
7.0.100.1330.01777.28
7.0.90.0320.02177.36
7.0.80.2490.02077.33
7.0.70.0330.01277.37
7.0.60.0910.03876.39
7.0.50.2400.05775.47
7.0.40.0180.03716.70
7.0.30.0430.04016.85
7.0.20.0190.05116.79
7.0.10.0170.03216.82
7.0.00.0090.04416.75
5.6.380.0380.03278.81
5.6.370.0250.03979.01
5.6.360.0530.02378.72
5.6.350.0420.02878.99
5.6.340.0430.02779.27
5.6.330.0400.03378.59
5.6.320.0320.03879.00
5.6.310.0410.03279.11
5.6.300.0420.02878.71
5.6.290.0450.02978.96
5.6.280.0270.06782.23
5.6.270.0330.04078.84
5.6.260.0450.02978.60
5.6.250.0500.03078.93
5.6.240.0300.03978.98
5.6.230.0350.03579.04
5.6.220.0360.03379.01
5.6.210.0320.05682.15
5.6.200.0300.05580.96
5.6.190.0330.07382.02
5.6.180.0460.05182.21
5.6.170.0390.07182.01
5.6.160.0390.06581.86
5.6.150.0360.05180.87
5.6.140.0330.04580.80
5.6.130.0280.07080.92
5.6.120.0310.04782.18
5.6.110.0310.04182.38
5.6.100.0370.03982.48
5.6.90.0380.06982.50
5.6.80.0290.07182.08
5.6.70.0290.02979.14
5.6.60.0460.02678.90
5.6.50.0350.02978.73
5.6.40.0310.03578.72
5.6.30.0350.02878.91
5.6.20.0340.03479.07
5.6.10.0370.03178.95
5.6.00.0250.04378.93
5.5.380.0380.02575.99
5.5.370.0320.02975.46
5.5.360.0270.03375.96
5.5.350.2090.03480.26
5.5.340.0420.06379.27
5.5.330.0350.03780.35
5.5.320.0360.06080.18
5.5.310.0470.05880.25
5.5.300.0320.05779.21
5.5.290.0330.03579.27
5.5.280.0310.05180.67
5.5.270.0340.03980.49
5.5.260.0260.05080.56
5.5.250.0290.07380.39
5.5.240.0370.06580.27
5.5.230.0320.02975.65
5.5.220.0270.03175.68
5.5.210.0430.02375.69
5.5.200.0460.01375.46
5.5.190.0280.03275.61
5.5.180.0320.02575.38
5.5.170.0400.02878.90
5.5.160.0340.02875.57
5.5.150.0380.03275.82
5.5.140.0400.02075.33
5.5.130.0290.03275.75
5.5.120.0390.02175.74
5.5.110.0510.01375.75
5.5.100.0440.01775.85
5.5.90.0370.02875.73
5.5.80.0260.03375.53
5.5.70.0370.02375.41
5.5.60.0240.04175.45
5.5.50.0310.03175.68
5.5.40.0370.02575.74
5.5.30.0400.02375.70
5.5.20.0350.02275.52
5.5.10.0420.01875.49
5.5.00.0340.03175.59

preferences:
55.11 ms | 401 KiB | 5 Q