3v4l.org

run code in 300+ PHP versions simultaneously
<?php $count = 100; $start = microtime(true); $a = ''; for($i = 0; $i < $count; $i++) { $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)
7.4.10.0090.00915.01
7.4.00.0040.01215.04
7.3.130.0100.00714.77
7.3.120.0120.00414.81
7.3.110.0070.01214.82
7.3.100.0060.00514.67
7.3.90.0060.00614.90
7.3.80.0030.01014.75
7.3.70.0030.00814.92
7.3.60.0050.00614.82
7.3.50.0030.00814.92
7.3.40.0080.00714.69
7.3.30.0110.00514.62
7.3.20.0070.00516.58
7.3.10.0080.00516.52
7.3.00.0050.00716.66
7.2.260.0060.01215.20
7.2.250.0050.01315.12
7.2.240.0110.00514.90
7.2.230.0060.00814.80
7.2.220.0060.00915.18
7.2.210.0050.01015.07
7.2.200.0050.01114.96
7.2.190.0050.00414.78
7.2.180.0020.01315.10
7.2.170.0050.00914.87
7.2.160.0080.00714.99
7.2.150.0050.00916.92
7.2.140.0050.01116.84
7.2.130.0060.01017.04
7.2.120.0020.01216.81
7.2.110.0050.00616.92
7.2.100.0060.00816.98
7.2.90.0020.01116.95
7.2.80.0080.00716.85
7.2.70.0060.00816.95
7.2.60.0020.01217.00
7.2.50.0020.00716.88
7.2.40.0040.00916.82
7.2.30.0100.00316.98
7.2.20.0100.00516.96
7.2.10.0060.00816.80
7.2.00.0050.00817.72
7.1.330.0100.00315.51
7.1.320.0020.01315.61
7.1.310.0020.01315.76
7.1.300.0030.00515.78
7.1.290.0030.01015.52
7.1.280.0090.00515.70
7.1.270.0040.00915.77
7.1.260.0060.00615.83
7.1.250.0030.01115.83
7.1.240.0000.01015.51
7.1.230.0070.01015.70
7.1.220.0040.01215.86
7.1.210.0060.01215.80
7.1.200.0080.00815.59
7.1.190.0060.00915.72
7.1.180.0070.00715.56
7.1.170.0060.00615.74
7.1.160.0000.01315.80
7.1.150.0030.00915.89
7.1.140.0060.00615.72
7.1.130.0040.01115.70
7.1.120.0110.00315.71
7.1.110.0080.00015.85
7.1.100.0030.00915.84
7.1.90.0070.00415.95
7.1.80.0040.01115.67
7.1.70.0040.01116.50
7.1.60.0110.00917.54
7.1.50.0150.00725.16
7.1.40.0030.01015.80
7.1.30.0000.00915.54
7.1.20.0070.00715.50
7.1.10.0000.01215.57
7.1.00.0000.04018.98
7.0.330.0070.01015.29
7.0.320.0060.00615.36
7.0.310.0120.00615.21
7.0.300.0030.01015.35
7.0.290.0030.00715.43
7.0.280.0000.01215.14
7.0.270.0090.00315.36
7.0.260.0030.00915.31
7.0.250.0000.00915.27
7.0.240.0030.01015.34
7.0.230.0000.01215.38
7.0.220.0080.00515.52
7.0.210.0030.01015.25
7.0.200.0040.00815.97
7.0.190.0000.01615.18
7.0.180.0070.00415.07
7.0.170.0060.00615.32
7.0.160.0120.00015.35
7.0.150.0030.01315.24
7.0.140.0020.04018.65
7.0.130.0070.00315.54
7.0.120.0030.04018.79
7.0.110.0090.04717.74
7.0.100.0130.04617.71
7.0.90.0030.03117.63
7.0.80.0080.02017.71
7.0.70.0020.05017.64
7.0.60.0070.04217.63
7.0.50.0170.02417.65
7.0.40.0080.03516.50
7.0.30.0030.04016.53
7.0.20.0090.03616.61
7.0.10.0050.04816.63
7.0.00.0040.02616.58
5.6.400.0100.00614.35
5.6.390.0030.01314.05
5.6.380.0060.01014.31
5.6.370.0090.00614.55
5.6.360.0110.00614.06
5.6.350.0030.01014.17
5.6.340.0090.00614.17
5.6.330.0060.00614.63
5.6.320.0070.00713.98
5.6.310.0030.00914.02
5.6.300.0150.00014.34
5.6.290.0080.00414.46
5.6.280.0060.00914.13
5.6.270.0090.00014.07
5.6.260.0020.02917.61
5.6.250.0070.02617.48
5.6.240.0070.04317.49
5.6.230.0050.04117.43
5.6.220.0020.04017.59
5.6.210.0040.02717.54
5.6.200.0080.03517.60
5.6.190.0020.03917.37
5.6.180.0050.03717.44
5.6.170.0100.02317.48
5.6.160.0030.02617.41
5.6.150.0050.02517.27
5.6.140.0070.02417.55
5.6.130.0080.02517.47
5.6.120.0020.03017.53
5.6.110.0050.02717.39
5.6.100.0050.02717.43
5.6.90.0070.03817.51
5.6.80.0050.04417.24
5.6.70.0100.04117.18
5.6.60.0080.03317.21
5.6.50.0080.02017.13
5.6.40.0050.02116.96
5.6.30.0030.02517.03
5.6.20.0090.04217.07
5.6.10.0060.02117.26
5.6.00.0080.03817.06
5.5.380.0040.02715.79
5.5.370.0100.03515.81
5.5.360.0080.04116.00
5.5.350.0020.03716.02
5.5.340.0100.03215.96
5.5.330.0080.03316.22
5.5.320.0050.03015.89
5.5.310.0140.01716.03
5.5.300.0080.02716.22
5.5.290.0080.03816.16
5.5.280.0070.02516.14
5.5.270.0080.02216.16
5.5.260.0070.04216.11
5.5.250.0030.02716.21
5.5.240.0130.03515.66
5.5.230.0080.03215.92
5.5.220.0030.03215.50
5.5.210.0060.04315.71
5.5.200.0080.03715.84
5.5.190.0080.02115.75
5.5.180.0030.03815.86
5.5.170.0070.00714.04
5.5.160.0050.04115.67
5.5.150.0080.03315.89
5.5.140.0120.02815.79
5.5.130.0080.02515.94
5.5.120.0050.03915.84
5.5.110.0080.03315.84
5.5.100.0020.02415.71
5.5.90.0080.03615.68
5.5.80.0100.03715.83
5.5.70.0020.03315.53
5.5.60.0070.02515.56
5.5.50.0060.02015.56
5.5.40.0020.03415.47
5.5.30.0070.02215.78
5.5.20.0060.02115.63
5.5.10.0050.03815.58
5.5.00.0030.03215.62
5.4.450.0080.03115.07
5.4.440.0020.02915.04
5.4.430.0030.02215.31
5.4.420.0020.03615.13
5.4.410.0090.04015.20
5.4.400.0060.01814.95
5.4.390.0050.02214.94
5.4.380.0070.02815.03
5.4.370.0000.02914.97
5.4.360.0080.03514.91
5.4.350.0050.03715.12
5.4.340.0040.02615.04
5.4.330.0070.00711.05
5.4.320.0070.03715.06
5.4.310.0080.03214.98
5.4.300.0070.04114.83
5.4.290.0090.04214.94
5.4.280.0070.03515.05
5.4.270.0040.04214.98
5.4.260.0060.03914.87
5.4.250.0020.02314.93
5.4.240.0060.02615.01
5.4.230.0020.03314.92
5.4.220.0060.02215.15
5.4.210.0030.03314.97
5.4.200.0050.02115.03
5.4.190.0050.02415.01
5.4.180.0080.03914.84
5.4.170.0070.03915.04
5.4.160.0080.02315.00
5.4.150.0070.02814.93
5.4.140.0060.03213.44
5.4.130.0020.02113.68
5.4.120.0090.01713.64
5.4.110.0030.02313.63
5.4.100.0050.02113.78
5.4.90.0090.01713.61
5.4.80.0030.03113.60
5.4.70.0060.02513.79
5.4.60.0050.02013.65
5.4.50.0030.02013.52
5.4.40.0020.02313.56
5.4.30.0010.03613.71
5.4.20.0070.03813.58
5.4.10.0030.02113.61
5.4.00.0070.03513.40
5.3.290.0080.03812.65
5.3.280.0050.02512.49
5.3.270.0030.02012.63
5.3.260.0030.04312.43
5.3.250.0050.03812.54
5.3.240.0080.03012.53
5.3.230.0000.02512.55
5.3.220.0040.02112.43
5.3.210.0050.02212.39
5.3.200.0010.02312.49
5.3.190.0030.03412.46
5.3.180.0030.02512.60
5.3.170.0070.03512.51
5.3.160.0050.02012.36
5.3.150.0040.01812.50
5.3.140.0050.02012.49
5.3.130.0030.02012.48
5.3.120.0100.03512.44
5.3.110.0050.01912.55
5.3.100.0070.03212.18
5.3.90.0050.03312.25
5.3.80.0050.04112.12
5.3.70.0050.03012.14
5.3.60.0020.02712.21
5.3.50.0040.02012.13
5.3.40.0070.03512.11
5.3.30.0100.03612.20
5.3.20.0050.02211.92
5.3.10.0040.02311.89
5.3.00.0070.01711.75
5.2.170.0030.06312.07
5.2.160.0000.04012.07
5.2.150.0070.06712.07
5.2.140.0100.05012.07
5.2.130.0000.07012.07
5.2.120.0100.03012.07
5.2.110.0000.03012.07
5.2.100.0070.05012.07
5.2.90.0000.03712.07
5.2.80.0030.02712.07
5.2.70.0100.06012.07
5.2.60.0070.07012.07
5.2.50.0000.06012.07
5.2.40.0100.04012.07
5.2.30.0000.03312.07
5.2.20.0070.02012.07
5.2.10.0030.05312.07
5.2.00.0070.05012.07
5.1.60.0030.05312.07
5.1.50.0030.02312.07
5.1.40.0030.04312.07
5.1.30.0030.04312.07
5.1.20.0030.05712.07
5.1.10.0070.04312.07
5.1.00.0030.05312.07
5.0.50.0070.04312.07
5.0.40.0000.04012.07
5.0.30.0030.06712.07
5.0.20.0000.03312.07
5.0.10.0030.02312.07
5.0.00.0030.06012.07
4.4.90.0000.01312.07
4.4.80.0070.03012.07
4.4.70.0000.01712.07
4.4.60.0000.03012.07
4.4.50.0070.03012.07
4.4.40.0000.02712.07
4.4.30.0000.01712.07
4.4.20.0030.03012.07
4.4.10.0070.02712.07
4.4.00.0000.03012.07
4.3.110.0030.02712.07
4.3.100.0030.02712.07
4.3.90.0000.02312.07
4.3.80.0030.03012.07
4.3.70.0030.02712.07
4.3.60.0030.01712.07
4.3.50.0070.01712.07
4.3.40.0000.02712.07
4.3.30.0000.03712.07
4.3.20.0000.03312.07
4.3.10.0030.03012.07
4.3.00.0000.02012.07

preferences:
34.08 ms | 400 KiB | 5 Q