3v4l.org

run code in 300+ PHP versions simultaneously
<?php $count = 1000; $start = microtime(true); $a = ''; for($i = 0; $i < $count; $i++) { $a = $a . 'a'; } printf("#1, done in %f\n", microtime(true) - $start); $start = microtime(true); $a = ""; for($i = 0; $i < $count; $i++) { $a .= "a"; } printf("#2, done in %f\n", microtime(true) - $start);

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)
7.4.10.0030.01016.20
7.4.00.0030.01016.61
7.3.130.0080.00716.36
7.3.120.0000.01616.50
7.3.110.0100.00516.33
7.3.100.0040.01116.05
7.3.90.0070.00716.53
7.3.80.0070.01016.34
7.3.70.0100.00316.41
7.3.60.0030.00916.45
7.3.50.0080.00616.24
7.3.40.0120.00316.27
7.3.30.0030.01016.22
7.3.20.0060.00918.05
7.3.10.0030.01017.27
7.3.00.0020.01117.31
7.2.260.0120.00616.62
7.2.250.0030.01616.64
7.2.240.0090.00616.49
7.2.230.0060.00916.71
7.2.220.0110.00716.70
7.2.210.0070.00716.54
7.2.200.0000.01516.78
7.2.190.0030.00616.54
7.2.180.0000.01416.61
7.2.170.0150.00016.55
7.2.160.0090.00916.41
7.2.150.0030.00718.42
7.2.140.0120.00318.30
7.2.130.0070.00517.60
7.2.120.0070.00517.63
7.2.110.0110.00017.56
7.2.100.0040.00917.64
7.2.90.0080.00717.61
7.2.80.0030.00917.59
7.2.70.0040.00917.60
7.2.60.0050.00717.72
7.2.50.0050.00817.78
7.2.40.0030.00917.61
7.2.30.0030.01117.63
7.2.20.0050.00917.51
7.2.10.0030.01017.37
7.2.00.0070.00818.29
7.1.330.0130.00017.46
7.1.320.0040.00717.31
7.1.310.0070.00717.38
7.1.300.0070.00317.29
7.1.290.0090.00017.27
7.1.280.0030.00917.16
7.1.270.0080.00317.24
7.1.260.0080.00817.15
7.1.250.0040.00916.55
7.1.240.0060.00617.12
7.1.230.0000.01317.23
7.1.220.0090.00417.10
7.1.210.0040.00817.32
7.1.200.0130.00017.26
7.1.190.0030.01017.16
7.1.180.0070.00717.20
7.1.170.0070.00717.28
7.1.160.0070.00417.28
7.1.150.0060.00617.08
7.1.140.0000.00917.30
7.1.130.0090.00317.07
7.1.120.0040.01117.24
7.1.110.0030.00617.29
7.1.100.0040.01117.24
7.1.90.0120.00017.23
7.1.80.0100.00617.32
7.1.70.0040.00617.13
7.1.60.0060.00818.50
7.1.50.0130.00616.89
7.1.40.0070.00717.33
7.1.30.0100.00317.39
7.1.20.0000.01017.27
7.1.10.0120.00017.07
7.1.00.0110.03019.78
7.0.330.0080.00316.83
7.0.320.0040.00816.79
7.0.310.0040.00816.72
7.0.300.0030.01017.09
7.0.290.0040.01216.84
7.0.280.0070.01016.85
7.0.270.0000.01117.00
7.0.260.0060.00916.88
7.0.250.0110.00017.00
7.0.240.0090.00617.09
7.0.230.0030.00916.90
7.0.220.0060.01017.09
7.0.210.0070.00717.12
7.0.200.0030.00717.00
7.0.190.0040.01116.91
7.0.180.0120.00417.08
7.0.170.0080.00817.02
7.0.160.0030.00716.80
7.0.150.0000.01017.14
7.0.140.0020.04319.54
7.0.130.0070.00716.81
7.0.120.0060.00616.85
7.0.110.0030.01017.09
7.0.100.0020.01417.02
7.0.90.0030.00717.04
7.0.80.0030.01016.89
7.0.70.0060.00616.86
7.0.60.0070.04518.51
7.0.50.0060.03317.47
7.0.40.0070.04717.49
7.0.30.0170.04117.57
7.0.20.0180.04117.63
7.0.10.0180.04317.42
7.0.00.0050.03117.51
5.6.400.0100.00616.20
5.6.390.0070.00715.72
5.6.380.0040.00916.08
5.6.370.0070.00715.98
5.6.360.0060.00616.01
5.6.350.0110.00716.06
5.6.340.0080.00815.98
5.6.330.0030.01316.10
5.6.320.0070.00715.73
5.6.310.0030.01016.07
5.6.300.0060.01015.95
5.6.290.0120.00616.00
5.6.280.0090.03518.51
5.6.270.0120.00316.21
5.6.260.0140.00016.23
5.6.250.0080.00815.91
5.6.240.0110.00415.95
5.6.230.0030.01016.08
5.6.220.0040.00816.00
5.6.210.0070.04218.26
5.6.200.0030.05017.06
5.6.190.0030.02718.16
5.6.180.1600.03018.21
5.6.170.0080.02818.28
5.6.160.0050.02318.02
5.6.150.0030.04817.03
5.6.140.0050.03017.05
5.6.130.0120.04217.10
5.6.120.0080.02318.41
5.6.110.0050.05218.57
5.6.100.0070.03218.50
5.6.90.0060.04518.43
5.6.80.0000.02518.32
5.6.70.0150.03918.11
5.6.60.0000.01815.88
5.6.50.0030.01016.07
5.6.40.0030.01015.73
5.6.30.0050.00516.09
5.6.20.0040.01115.74
5.6.10.0000.01415.76
5.6.00.0030.01315.89
5.5.380.0030.01015.95
5.5.370.0070.00715.91
5.5.360.0070.00315.80
5.5.350.0160.04318.37
5.5.340.0050.03116.97
5.5.330.0060.03817.88
5.5.320.0120.04018.17
5.5.310.0160.03218.07
5.5.300.0070.03016.91
5.5.290.0030.02817.04
5.5.280.0110.04318.34
5.5.270.0020.04018.34
5.5.260.0130.02718.23
5.5.250.0080.04118.18
5.5.240.0050.04118.02
5.5.230.0000.01515.73
5.5.220.0040.01115.76
5.5.210.0070.01015.77
5.5.200.0050.00515.68
5.5.190.0100.00615.95
5.5.180.0000.01015.81
5.5.170.0000.01315.84
5.5.160.0030.01215.98
5.5.150.0060.00615.59
5.5.140.0130.00615.63
5.5.130.0030.00715.99
5.5.120.0060.00915.75
5.5.110.0030.01515.84
5.5.100.0000.01315.93
5.5.90.0090.00315.65
5.5.80.0070.00715.76
5.5.70.0100.00615.78
5.5.60.0030.00715.90
5.5.50.0000.01315.46
5.5.40.0040.00815.69
5.5.30.0000.01215.98
5.5.20.0000.01015.66
5.5.10.0110.00415.68
5.5.00.0120.00615.88
5.4.450.0370.03415.95
5.4.440.0410.03316.07
5.4.430.0100.03116.01
5.4.420.0130.02715.80
5.4.410.0220.02815.96
5.4.400.0680.03115.78
5.4.390.0600.02815.62
5.4.380.0130.03115.47
5.4.370.0130.02815.67
5.4.360.0120.03115.59
5.4.350.0060.02412.28
5.4.340.0040.02612.30
5.4.330.0060.00312.77
5.4.320.0050.02412.51
5.4.310.0050.02712.62
5.4.300.0060.02612.35
5.4.290.0060.02412.58
5.4.280.0070.02112.39
5.4.270.0060.02112.41
5.4.260.0030.02712.51
5.4.250.0050.02815.66
5.4.240.0030.03015.76
5.4.230.0090.02715.80
5.4.220.0100.02715.66
5.4.210.0020.03215.72
5.4.200.0080.02715.90
5.4.190.0050.03115.71
5.4.180.0070.02915.62
5.4.170.0060.04015.63
5.4.160.0020.03315.79
5.4.150.0050.03115.58
5.4.140.0050.02914.61
5.4.130.0020.03214.49
5.4.120.0050.03114.38
5.4.110.0030.04114.42
5.4.100.0020.03114.53
5.4.90.0050.02814.45
5.4.80.0050.02714.30
5.4.70.0020.02814.56
5.4.60.0020.03014.57
5.4.50.0100.02514.52
5.4.40.0100.02214.52
5.4.30.0050.03014.41
5.4.20.0100.02214.54
5.4.10.0130.02214.51
5.4.00.0090.02314.11
5.3.290.0050.02312.91
5.3.280.0070.03213.89
5.3.270.0050.03113.91
5.3.260.0070.02813.77
5.3.250.0100.03013.82
5.3.240.0070.02813.73
5.3.230.0040.03113.88
5.3.220.0030.02913.70
5.3.210.0100.02913.70
5.3.200.0050.03013.54
5.3.190.0000.03313.70
5.3.180.0070.03013.81
5.3.170.0050.02713.81
5.3.160.0070.02813.92
5.3.150.0050.03113.87
5.3.140.0030.03113.86
5.3.130.0070.03013.70
5.3.120.0090.02713.68
5.3.110.0060.03013.67
5.3.100.0060.03413.59
5.3.90.0080.02313.52
5.3.80.0020.03113.49
5.3.70.0050.03213.43
5.3.60.0020.03013.42
5.3.50.0080.02513.41
5.3.40.0000.03213.38
5.3.30.0050.02813.34
5.3.20.0080.02513.24
5.3.10.0070.02813.15
5.3.00.0070.03313.12
5.2.170.0030.04311.19
5.2.160.0000.05311.11
5.2.150.0100.03311.27
5.2.140.0030.04011.09
5.2.130.0000.04711.15
5.2.120.0070.03711.14
5.2.110.0100.05011.04
5.2.100.0070.04311.15
5.2.90.0000.04311.25
5.2.80.0070.04011.27
5.2.70.0070.04011.01
5.2.60.0030.04011.10
5.2.50.0030.04711.05
5.2.40.0030.04010.95
5.2.30.0000.04711.16
5.2.20.0130.03010.75
5.2.10.0070.03710.96
5.2.00.0030.03710.87
5.1.60.0030.0339.92
5.1.50.0030.0339.93
5.1.40.0030.03310.00
5.1.30.0030.03710.33
5.1.20.0070.03310.32
5.1.10.0030.03710.28
5.1.00.0100.0309.91
5.0.50.0000.0338.66
5.0.40.0070.0238.29
5.0.30.0000.0438.41
5.0.20.0030.0278.40
5.0.10.0030.0308.32
5.0.00.0070.0378.28
4.4.90.0000.0236.47
4.4.80.0030.0206.47
4.4.70.0000.0236.47
4.4.60.0100.0136.47
4.4.50.0070.0206.47
4.4.40.0000.0336.47
4.4.30.0000.0236.47
4.4.20.0030.0206.47
4.4.10.0000.0276.47
4.4.00.0030.0306.47
4.3.110.0000.0236.47
4.3.100.0000.0276.47
4.3.90.0100.0176.47
4.3.80.0070.0376.47
4.3.70.0030.0276.47
4.3.60.0000.0206.47
4.3.50.0030.0306.47
4.3.40.0000.0376.47
4.3.30.0000.0236.47
4.3.20.0030.0206.47
4.3.10.0030.0206.47
4.3.00.0100.0238.41

preferences:
35.81 ms | 401 KiB | 5 Q