3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = "abab"; echo preg_replace("/(a)/", "$1-", $a); // echo $a;

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)
8.3.60.0000.01816.50
8.3.50.0110.00716.27
8.3.40.0070.00718.97
8.3.30.0120.00318.84
8.3.20.0040.00420.35
8.3.10.0060.00323.71
8.3.00.0080.00022.06
8.2.180.0110.01116.75
8.2.170.0080.00822.96
8.2.160.0060.00919.08
8.2.150.0080.00024.18
8.2.140.0080.00024.66
8.2.130.0060.00321.13
8.2.120.0080.00026.35
8.2.110.0060.00322.27
8.2.100.0040.00818.03
8.2.90.0050.00319.05
8.2.80.0000.00817.97
8.2.70.0000.00817.63
8.2.60.0050.00317.80
8.2.50.0050.00318.10
8.2.40.0080.00020.30
8.2.30.0040.00421.07
8.2.20.0000.00718.14
8.2.10.0060.00318.00
8.2.00.0080.00018.07
8.1.280.0090.00625.92
8.1.270.0000.00822.06
8.1.260.0050.00326.35
8.1.250.0080.00028.09
8.1.240.0070.00321.07
8.1.230.0070.00419.14
8.1.220.0050.00317.74
8.1.210.0050.00318.77
8.1.200.0030.00917.48
8.1.190.0080.00017.35
8.1.180.0030.00618.10
8.1.170.0030.00618.78
8.1.160.0040.00418.93
8.1.150.0070.00018.85
8.1.140.0030.00519.58
8.1.130.0030.00318.78
8.1.120.0000.00717.60
8.1.110.0000.00717.46
8.1.100.0000.00817.45
8.1.90.0070.00017.54
8.1.80.0020.00517.44
8.1.70.0030.00317.43
8.1.60.0020.00517.55
8.1.50.0030.00617.50
8.1.40.0080.00017.60
8.1.30.0040.00417.65
8.1.20.0040.00417.76
8.1.10.0040.00417.63
8.1.00.0030.00517.61
8.0.300.0050.00220.08
8.0.290.0070.00016.88
8.0.280.0000.00718.34
8.0.270.0020.00517.28
8.0.260.0000.00716.91
8.0.250.0060.00017.04
8.0.240.0050.00217.08
8.0.230.0020.00517.02
8.0.220.0070.00016.97
8.0.210.0000.00717.00
8.0.200.0000.00617.00
8.0.190.0050.00317.00
8.0.180.0040.00417.03
8.0.170.0050.00317.02
8.0.160.0080.00016.95
8.0.150.0040.00417.00
8.0.140.0030.00516.89
8.0.130.0000.00613.41
8.0.120.0000.00816.88
8.0.110.0000.00817.01
8.0.100.0040.00417.04
8.0.90.0040.00416.87
8.0.80.0120.00616.94
8.0.70.0040.00416.99
8.0.60.0000.00717.00
8.0.50.0050.00216.77
8.0.30.0110.01017.13
8.0.20.0110.00817.40
8.0.10.0040.00417.07
8.0.00.0060.01216.84
7.4.330.0000.00615.55
7.4.320.0030.00316.65
7.4.300.0060.00016.65
7.4.290.0030.00316.62
7.4.280.0000.00716.72
7.4.270.0070.00016.71
7.4.260.0000.00716.62
7.4.250.0040.00416.70
7.4.240.0030.00516.58
7.4.230.0000.00716.86
7.4.220.0100.01616.80
7.4.210.0050.00916.72
7.4.200.0040.00416.58
7.4.160.0110.00616.64
7.4.150.0110.00717.40
7.4.140.0120.00617.86
7.4.130.0110.00616.60
7.4.120.0130.00516.65
7.4.110.0140.00616.61
7.4.100.0060.01516.57
7.4.90.0150.00316.72
7.4.80.0000.01819.39
7.4.70.0040.01216.60
7.4.60.0100.00616.68
7.4.50.0060.01016.48
7.4.40.0070.01016.58
7.4.30.0200.01316.66
7.4.00.0030.01214.89
7.3.330.0000.00613.19
7.3.320.0000.00513.20
7.3.310.0070.00016.13
7.3.300.0000.00716.28
7.3.290.0000.00716.24
7.3.280.0070.01016.30
7.3.270.0080.01517.40
7.3.260.0070.01016.52
7.3.250.0130.00416.42
7.3.240.0090.01116.45
7.3.230.0180.00316.24
7.3.210.0290.02316.50
7.3.200.0100.00716.30
7.3.190.0030.01916.37
7.3.180.0100.01316.73
7.3.170.0070.01016.53
7.3.160.0090.00616.61
7.3.120.0070.01115.03
7.3.110.0030.01314.82
7.3.100.0070.00714.85
7.3.90.0040.00814.82
7.3.80.0040.00415.10
7.3.70.0100.00714.88
7.3.60.0040.01114.70
7.3.50.0000.01114.77
7.3.40.0030.00714.91
7.3.30.0030.00714.86
7.3.20.0030.01016.71
7.3.10.0040.00716.69
7.3.00.0040.00416.74
7.2.330.0070.01016.64
7.2.320.0080.01116.72
7.2.310.0060.01016.42
7.2.300.0110.01116.65
7.2.290.0060.01216.66
7.2.240.0070.01015.28
7.2.230.0000.01215.02
7.2.220.0060.00915.02
7.2.210.0000.01414.92
7.2.200.0060.00615.08
7.2.190.0060.00915.04
7.2.180.0000.01014.89
7.2.170.0090.00615.06
7.2.160.0100.00615.01
7.2.150.0120.00316.94
7.2.140.0070.00716.93
7.2.130.0040.01117.04
7.2.120.0100.00016.79
7.2.110.0040.01216.97
7.2.100.0060.00917.11
7.2.90.0060.00316.77
7.2.80.0090.00317.02
7.2.70.0080.00416.99
7.2.60.0090.00316.99
7.2.50.0070.00716.99
7.2.40.0090.00616.88
7.2.30.0030.00916.93
7.2.20.0000.01217.16
7.2.10.0040.00417.14
7.2.00.0030.01016.73
7.1.330.0060.01015.86
7.1.320.0060.00616.03
7.1.310.0030.00715.93
7.1.300.0040.01115.76
7.1.290.0060.00615.79
7.1.280.0080.00515.59
7.1.270.0030.00615.96
7.1.260.0080.00315.73
7.1.250.0090.00615.67
7.1.200.0080.00416.02
7.1.70.0110.00817.27
7.1.60.0270.01635.13
7.1.50.0240.02134.96
7.1.40.0250.01834.51
7.1.30.0180.01934.63
7.1.20.0330.00934.81
7.1.10.0100.01016.81
7.1.00.0100.01017.07
7.0.200.0080.01216.96
7.0.190.0120.00916.82
7.0.180.0030.01516.30
7.0.170.0100.00916.32
7.0.160.0040.01516.26
7.0.150.0080.01216.38
7.0.140.0090.01116.41
7.0.130.0080.00816.64
7.0.120.0070.01016.74
7.0.110.0000.01516.38
7.0.100.0030.01216.63
7.0.90.0370.00714.61
7.0.80.0300.01314.56
7.0.70.0390.01414.55
7.0.60.0270.01514.46
7.0.50.0240.01914.73
7.0.40.0330.01214.68
7.0.30.0600.00614.73
7.0.20.0300.01614.89
7.0.10.0260.01114.64
7.0.00.0260.01014.75

preferences:
35.06 ms | 400 KiB | 5 Q