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run code in 300+ PHP versions simultaneously
<?php //PHPの関数 //様々な関数 $a =''; //empty関数 /*以下の場合にTRUE ・空白の数値 ・文字列、配列、数値の0 ・文字列の半角の0 ・NULLやFALSE ・変数が定義されただけの状態*/ echo empty($a).PHP_EOL;

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)
8.3.70.0150.00018.18
8.3.60.0090.00618.30
8.3.50.0070.00716.38
8.3.40.0090.00618.57
8.3.30.0120.00618.54
8.3.20.0040.00424.18
8.3.10.0030.00624.66
8.3.00.0040.00426.16
8.2.180.0100.01025.92
8.2.170.0100.01018.89
8.2.160.0070.00722.96
8.2.150.0050.00325.66
8.2.140.0040.00424.66
8.2.130.0040.00426.16
8.2.120.0070.00026.35
8.2.110.0060.00322.20
8.2.100.0110.00019.51
8.2.90.0040.00417.84
8.2.80.0040.00418.04
8.2.70.0040.00417.50
8.2.60.0030.00517.63
8.2.50.0070.00318.05
8.2.40.0050.00318.28
8.2.30.0000.00717.98
8.2.20.0060.00318.00
8.2.10.0000.00719.16
8.2.00.0030.00619.17
8.1.280.0120.00925.92
8.1.270.0040.00423.99
8.1.260.0000.00828.09
8.1.250.0080.00028.09
8.1.240.0060.00322.14
8.1.230.0110.00420.89
8.1.220.0040.00417.74
8.1.210.0040.00418.77
8.1.200.0060.00317.23
8.1.190.0040.00417.13
8.1.180.0000.00718.10
8.1.170.0040.00418.80
8.1.160.0050.00218.87
8.1.150.0040.00418.86
8.1.140.0040.00418.86
8.1.130.0030.00320.17
8.1.120.0040.00417.46
8.1.110.0080.00317.33
8.1.100.0070.00017.29
8.1.90.0040.00417.32
8.1.80.0040.00417.47
8.1.70.0000.00717.43
8.1.60.0040.00417.60
8.1.50.0040.00417.59
8.1.40.0000.00717.54
8.1.30.0000.00817.65
8.1.20.0070.00017.54
8.1.10.0090.00017.51
8.1.00.0080.00017.41
8.0.300.0040.00421.46
8.0.290.0030.00616.63
8.0.280.0070.00018.35
8.0.270.0030.00318.00
8.0.260.0030.00318.61
8.0.250.0080.00016.83
8.0.240.0000.00616.98
8.0.230.0070.00016.95
8.0.220.0000.00616.88
8.0.210.0030.00516.88
8.0.200.0000.00816.80
8.0.190.0000.00816.83
8.0.180.0030.00316.81
8.0.170.0060.00316.95
8.0.160.0000.00716.79
8.0.150.0050.00316.80
8.0.140.0000.00716.75
8.0.130.0030.00313.31
8.0.120.0040.00416.89
8.0.110.0070.00016.72
8.0.100.0080.00016.94
8.0.90.0000.00716.87
8.0.80.0050.01116.88
8.0.70.0000.00716.93
8.0.60.0000.00716.93
8.0.50.0070.00016.84
8.0.30.0120.00316.95
8.0.20.0090.00916.79
8.0.10.0160.00517.03
8.0.00.0130.00817.22
7.4.330.0020.00215.55
7.4.320.0070.00016.49
7.4.300.0030.00316.28
7.4.290.0000.00816.42
7.4.280.0090.00016.33
7.4.270.0040.00416.28
7.4.260.0030.00313.22
7.4.250.0040.00416.31
7.4.240.0070.00016.45
7.4.230.0000.00716.52
7.4.220.0030.00316.52
7.4.210.0080.00616.50
7.4.200.0000.00716.52
7.4.140.0100.01316.32
7.4.130.0090.01016.22
7.4.120.0080.00816.37
7.4.110.0120.00415.98
7.4.100.0090.00916.12
7.4.90.0040.01216.23
7.4.80.0070.01116.44
7.4.70.0080.00816.48
7.4.60.0120.00916.16
7.4.50.0120.00616.33
7.4.40.0040.01416.38
7.4.30.0060.01016.34
7.4.20.0120.00316.13
7.4.10.0100.00716.25
7.4.00.0000.01816.23
7.3.330.0040.00416.10
7.3.320.0020.00213.04
7.3.310.0070.00016.15
7.3.300.0000.00616.20
7.3.290.0070.00816.16
7.3.260.0110.00616.23
7.3.250.0090.00916.12
7.3.240.0100.00715.99
7.3.230.0100.00516.32
7.3.220.0120.00616.11
7.3.210.0060.01016.20
7.3.200.0030.01316.32
7.3.190.0130.00516.07
7.3.180.0070.01015.98
7.3.170.0120.00616.11
7.3.160.0120.00416.06
7.3.150.0140.00316.09
7.3.140.0110.00716.38
7.3.130.0080.00816.20
7.3.120.0140.00316.04
7.3.110.0080.00816.12
7.3.100.0110.00516.18
7.3.90.0060.01116.39
7.3.80.0000.01816.30
7.3.70.0110.00416.12
7.3.60.0050.01116.27
7.3.50.0100.00716.01
7.3.40.0030.01116.24
7.3.30.0030.01616.01
7.3.20.0750.00316.24
7.3.10.0050.01116.14
7.3.00.0060.01216.21

preferences:
54.18 ms | 401 KiB | 5 Q