3v4l.org

run code in 300+ PHP versions simultaneously
<?php function &test($a) { $empty = array(); return isset($a) ? $a : $empty; } function &test2($a) { $empty = array(); return ${isset($a) ? 'a' : 'empty'}; } $test =& test('123'); print_r($test); $test =& test2('123'); print_r($test); $test =& test(NULL); print_r($test); $test =& test2(NULL); print_r($test);

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)
8.3.40.0190.00318.85
8.3.30.0070.00718.96
8.3.20.0040.00420.34
8.3.10.0050.00321.72
8.3.00.0050.00319.14
8.2.170.0030.01422.96
8.2.160.0100.00320.39
8.2.150.0040.00424.18
8.2.140.0050.00324.66
8.2.130.0000.00826.16
8.2.120.0050.00319.67
8.2.110.0030.00620.56
8.2.100.0040.00718.17
8.2.90.0000.00818.22
8.2.80.0050.00317.97
8.2.70.0040.00417.80
8.2.60.0040.00418.09
8.2.50.0040.00418.10
8.2.40.0040.00419.11
8.2.30.0000.00919.35
8.2.20.0040.00417.59
8.2.10.0000.00718.23
8.2.00.0070.00017.65
8.1.270.0040.00418.93
8.1.260.0040.00426.35
8.1.250.0040.00428.09
8.1.240.0070.00322.07
8.1.230.0080.00320.92
8.1.220.0040.00417.79
8.1.210.0000.00918.77
8.1.200.0040.00417.35
8.1.190.0080.00017.13
8.1.180.0030.00618.10
8.1.170.0030.00618.49
8.1.160.0040.00420.30
8.1.150.0030.00618.94
8.1.140.0000.00717.46
8.1.130.0030.00317.76
8.1.120.0030.00317.39
8.1.110.0040.00417.43
8.1.100.0000.00717.48
8.1.90.0040.00417.36
8.1.80.0040.00417.36
8.1.70.0040.00417.50
8.1.60.0000.00917.47
8.1.50.0080.00017.58
8.1.40.0000.00817.54
8.1.30.0040.00417.62
8.1.20.0000.00717.64
8.1.10.0040.00417.48
8.1.00.0000.01117.30
8.0.300.0080.00019.70
8.0.290.0040.00416.75
8.0.280.0050.00318.49
8.0.270.0040.00417.33
8.0.260.0000.00617.30
8.0.250.0070.00017.01
8.0.240.0080.00016.88
8.0.230.0000.00817.04
8.0.220.0000.00816.87
8.0.210.0000.00716.83
8.0.200.0050.00516.97
8.0.190.0030.00617.05
8.0.180.0070.00016.91
8.0.170.0000.00716.86
8.0.160.0000.00717.04
8.0.150.0000.00816.90
8.0.140.0040.00316.95
8.0.130.0050.00013.14
8.0.120.0030.00516.94
8.0.110.0050.00216.94
8.0.100.0070.00016.79
8.0.90.0040.00416.91
8.0.80.0050.01116.95
8.0.70.0070.00016.84
8.0.60.0070.00016.99
8.0.50.0000.00716.89
8.0.30.0130.00717.21
8.0.20.0090.01117.40
8.0.10.0050.00216.97
8.0.00.0090.01116.85
7.4.330.0000.00515.16
7.4.320.0000.00616.48
7.4.300.0060.00016.55
7.4.290.0100.00016.50
7.4.280.0040.00416.59
7.4.270.0000.00716.52
7.4.260.0000.00716.44
7.4.250.0000.00716.36
7.4.240.0060.00216.58
7.4.230.0030.00316.59
7.4.220.0030.01516.60
7.4.210.0100.01016.50
7.4.200.0070.00016.25
7.4.160.0070.00716.52
7.4.150.0060.01217.40
7.4.140.0090.00917.86
7.4.130.0110.01116.49
7.4.120.0080.00916.47
7.4.110.0060.01616.54
7.4.100.0120.00916.55
7.4.90.0060.01116.63
7.4.80.0070.01019.39
7.4.70.0090.01316.61
7.4.60.0080.00816.45
7.4.50.0080.00016.71
7.4.40.0000.01616.64
7.4.30.0130.00916.64
7.4.00.0090.00614.95
7.3.330.0030.00313.17
7.3.320.0050.00013.17
7.3.310.0000.00716.20
7.3.300.0070.00016.25
7.3.290.0080.00616.26
7.3.280.0130.00516.29
7.3.270.0170.00017.40
7.3.260.0110.01116.53
7.3.250.0100.00816.43
7.3.240.0070.01116.34
7.3.230.0030.01316.39
7.3.210.0030.01316.40
7.3.200.0080.00819.39
7.3.190.0100.00716.47
7.3.180.0130.00316.35
7.3.170.0130.00416.37
7.3.160.0120.00816.34
7.3.120.0100.00614.86
7.3.110.0050.01414.66
7.3.100.0040.01214.68
7.3.90.0050.00914.68
7.3.80.0080.00614.73
7.3.70.0030.00714.87
7.3.60.0050.01114.90
7.3.50.0070.00514.63
7.3.40.0050.01014.60
7.3.30.0050.00514.79
7.3.20.0070.01016.71
7.3.10.0080.00816.65
7.3.00.0090.00516.59
7.2.330.0070.01016.76
7.2.320.0110.01216.53
7.2.310.0140.00416.45
7.2.300.0100.00716.71
7.2.290.0110.00716.71
7.2.250.0060.00815.11
7.2.240.0030.01415.11
7.2.230.0060.01115.13
7.2.220.0050.01015.01
7.2.210.0070.00915.10
7.2.200.0070.00414.74
7.2.190.0030.01214.98
7.2.180.0070.00814.98
7.2.170.0070.01115.01
7.2.160.0000.01414.91
7.2.150.0080.00716.91
7.2.140.0060.00817.01
7.2.130.0080.00516.83
7.2.120.0050.01016.94
7.2.110.0050.01016.83
7.2.100.0030.01416.87
7.2.90.0070.00616.85
7.2.80.0090.00716.81
7.2.70.0050.01116.92
7.2.60.0080.00516.93
7.2.50.0030.01216.98
7.2.40.0030.01216.75
7.2.30.0090.00416.84
7.2.20.0070.00816.90
7.2.10.0050.01016.91
7.2.00.0060.00717.73
7.1.330.0050.01115.76
7.1.320.0040.01115.74
7.1.310.0050.00815.72
7.1.300.0040.00715.77
7.1.290.0030.01115.62
7.1.280.0050.00515.77
7.1.270.0100.00515.72
7.1.260.0060.00715.79
7.1.250.0090.00015.96
7.1.240.0010.00815.81
7.1.230.0070.00715.72
7.1.220.0070.00715.90
7.1.210.0060.00615.79
7.1.200.0020.01315.72
7.1.190.0050.01015.52
7.1.180.0070.00315.66
7.1.170.0070.00715.63
7.1.160.0050.00815.76
7.1.150.0070.00515.58
7.1.140.0030.00715.75
7.1.130.0040.00715.79
7.1.120.0050.00715.65
7.1.110.0090.00515.78
7.1.100.0050.00716.57
7.1.90.0070.00415.69
7.1.80.0060.00415.88
7.1.70.0060.00416.23
7.1.60.0090.00816.95
7.1.50.0020.01116.17
7.1.40.0020.01015.78
7.1.30.0020.01315.78
7.1.20.0080.00715.79
7.1.10.0070.00515.71
7.1.00.0040.03317.92
7.0.330.0070.00515.21
7.0.320.0040.00815.29
7.0.310.0040.00715.35
7.0.300.0050.01115.11
7.0.290.0060.00815.12
7.0.280.0080.00615.21
7.0.270.0040.00715.25
7.0.260.0040.01115.35
7.0.250.0030.01315.18
7.0.240.0060.00615.13
7.0.230.0100.00015.29
7.0.220.0040.00915.36
7.0.210.0070.00515.37
7.0.200.0030.00915.82
7.0.190.0070.00415.39
7.0.180.0060.00515.25
7.0.170.0060.00615.35
7.0.160.0030.00915.48
7.0.150.0020.01015.32
7.0.140.0070.02717.52
7.0.130.0040.00715.08
7.0.120.0040.01015.38
7.0.110.0060.00715.29
7.0.100.0000.01015.14
7.0.90.0100.00315.39
7.0.80.0070.00715.24
7.0.70.0050.00915.39
7.0.60.0060.01716.85
7.0.50.0070.01916.28
7.0.40.0050.03115.64
7.0.30.0130.03015.78
7.0.20.0140.03215.73
7.0.10.0080.02715.81
7.0.00.0060.02215.65
5.6.400.0070.00514.17
5.6.390.0030.01014.26
5.6.380.0020.00814.31
5.6.370.0050.00914.44
5.6.360.0030.01314.36
5.6.350.0060.00714.01
5.6.340.0030.01214.21
5.6.330.0020.01014.49
5.6.320.0030.01014.24
5.6.310.0050.00614.27
5.6.300.0050.00814.26
5.6.290.0090.00514.27
5.6.280.0030.03216.46
5.6.270.0100.00414.40
5.6.260.0040.01113.95
5.6.250.0090.00514.20
5.6.240.0060.00814.36
5.6.230.0110.00214.08
5.6.220.0060.00814.12
5.6.210.0070.02016.41
5.6.200.0050.03315.47
5.6.190.0070.02516.25
5.6.180.0130.01516.23
5.6.170.0170.02816.18
5.6.160.0080.01816.33
5.6.150.0080.02615.41
5.6.140.0030.03615.53
5.6.130.0060.03015.52
5.6.120.0100.02516.53
5.6.110.0040.02316.49
5.6.100.0060.02316.39
5.6.90.0040.02216.51
5.6.80.0100.02516.27
5.6.70.0060.00914.16
5.6.60.0050.00614.05
5.6.50.0100.00314.08
5.6.40.0120.00214.12
5.6.30.0080.00714.05
5.6.20.0010.01114.05
5.6.10.0060.00914.09
5.6.00.0000.01413.91
5.5.380.0040.00914.32
5.5.370.0010.01014.23
5.5.360.0070.00713.95
5.5.350.0120.03016.19
5.5.340.0050.03415.43
5.5.330.0060.01916.29
5.5.320.0120.02516.36
5.5.310.0130.03116.10
5.5.300.0050.03015.34
5.5.290.0030.03715.38
5.5.280.0020.02216.33
5.5.270.0060.03116.40
5.5.260.0120.02816.40
5.5.250.0090.02916.23
5.5.240.0040.02216.11
5.5.230.0130.00113.96
5.5.220.0030.00813.90
5.5.210.0050.00813.95
5.5.200.0100.00314.06
5.5.190.0030.01113.99
5.5.180.0060.00814.16
5.5.170.0040.00814.02
5.5.160.0050.01013.97
5.5.150.0060.00814.04
5.5.140.0040.01313.99
5.5.130.0010.00914.01
5.5.120.0080.00713.95
5.5.110.0080.00714.02
5.5.100.0070.00713.87
5.5.90.0020.01213.97
5.5.80.0060.00914.12
5.5.70.0060.01013.83
5.5.60.0070.00413.96
5.5.50.0050.00713.86
5.5.40.0040.00914.23
5.5.30.0010.00913.94
5.5.20.0030.00913.85
5.5.10.0100.00014.02
5.5.00.0040.00914.03
5.4.450.0240.02214.72
5.4.440.0230.02614.61
5.4.430.0240.02114.78
5.4.420.0210.02414.58
5.4.410.0080.02014.67
5.4.400.0270.02014.46
5.4.390.0240.02114.52
5.4.380.0130.02114.22
5.4.370.0140.01814.36
5.4.360.0120.01914.34
5.4.350.0130.01814.36
5.4.340.0100.02214.24
5.4.330.0020.00612.15
5.4.320.0090.02314.48
5.4.310.0170.01614.36
5.4.300.0110.02114.42
5.4.290.0120.02014.37
5.4.280.0080.02314.45
5.4.270.0100.01914.28
5.4.260.0100.02014.37
5.4.250.0080.02214.32
5.4.240.0130.01914.35
5.4.230.0090.02014.24
5.4.220.0090.02114.34
5.4.210.0130.02014.29
5.4.200.0140.01913.72
5.4.190.0040.02514.35
5.4.180.0080.02414.31
5.4.170.0100.02314.54
5.4.160.0110.02214.32
5.4.150.0120.02714.34
5.4.140.0120.02213.60
5.4.130.0030.02813.63
5.4.120.0090.02213.77
5.4.110.0120.02413.65
5.4.100.0060.02713.56
5.4.90.0070.02313.61
5.4.80.0080.02013.58
5.4.70.0080.02013.53
5.4.60.0100.02613.61
5.4.50.0080.02013.63
5.4.40.0070.02213.65
5.4.30.0100.01913.70
5.4.20.0070.02313.49
5.4.10.0090.02013.54
5.4.00.0080.02213.41
5.3.290.0200.05314.72
5.3.280.0270.05014.64
5.3.270.0200.05714.67
5.3.260.0200.05314.62
5.3.250.0270.04314.74
5.3.240.0230.05014.75
5.3.230.0200.05714.58
5.3.220.0200.05014.70
5.3.210.0230.05714.67
5.3.200.0170.05314.61
5.3.190.0300.04014.61
5.3.180.0370.05314.73
5.3.170.0170.05314.59
5.3.160.0100.06014.67
5.3.150.0330.03714.74
5.3.140.0130.05314.57
5.3.130.0230.05014.57
5.3.120.0070.06714.53
5.3.110.0270.04314.68
5.3.100.0170.05314.09
5.3.90.0070.06314.25
5.3.80.0270.05014.25
5.3.70.0200.04714.23
5.3.60.0200.05013.99
5.3.50.0130.05714.00
5.3.40.0200.04713.98
5.3.30.0200.04713.97
5.3.20.0100.06013.80
5.3.10.0330.03313.78
5.3.00.0230.05013.75
5.2.170.0100.04711.17
5.2.160.0130.04311.15
5.2.150.0170.04311.27
5.2.140.0130.04711.25
5.2.130.0170.05711.33
5.2.120.0130.05011.31
5.2.110.0170.04011.09
5.2.100.0200.04011.33
5.2.90.0100.04711.14
5.2.80.0170.04311.10
5.2.70.0130.06011.17
5.2.60.0330.04711.09
5.2.50.0270.04311.13
5.2.40.0170.04311.04
5.2.30.0130.04711.09
5.2.20.0100.05011.06
5.2.10.0130.05010.87
5.2.00.0100.05010.76
5.1.60.0230.04010.02
5.1.50.0070.04010.18
5.1.40.0170.0339.98
5.1.30.0170.03310.37
5.1.20.0170.03310.34
5.1.10.0070.04310.21
5.1.00.0300.03310.21
5.0.50.0030.0338.76
5.0.40.0130.0238.62
5.0.30.0170.0408.35
5.0.20.0030.0378.20
5.0.10.0170.0338.29
5.0.00.0130.0408.36
4.4.90.0100.0236.26
4.4.80.0070.0276.26
4.4.70.0130.0276.26
4.4.60.0170.0236.26
4.4.50.0100.0336.26
4.4.40.0100.0336.26
4.4.30.0070.0236.26
4.4.20.0030.0306.26
4.4.10.0100.0206.26
4.4.00.0100.0436.26
4.3.110.0100.0206.26
4.3.100.0070.0336.26
4.3.90.0100.0276.26
4.3.80.0100.0306.26
4.3.70.0170.0206.26
4.3.60.0030.0236.26
4.3.50.0130.0176.26
4.3.40.0030.0376.26
4.3.30.0070.0236.26
4.3.20.0000.0276.26
4.3.10.0030.0236.26
4.3.00.0000.0237.60

preferences:
53.08 ms | 400 KiB | 5 Q