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run code in 300+ PHP versions simultaneously
<?php //PHPの関数 //様々な関数 $a =''; //empty関数 /*以下の場合にTRUE ・空白の数値 ・NULLやFALSE ・変数が定義されただけの状態 ・文字列の半角の0 ・文字列、配列、数値の0 */ echo empty($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)
8.3.60.0110.00418.31
8.3.50.0110.00316.30
8.3.40.0070.01118.54
8.3.30.0110.00718.59
8.3.20.0000.00724.18
8.3.10.0070.00324.66
8.3.00.0040.00426.16
8.2.180.0120.00925.92
8.2.170.0060.00918.96
8.2.160.0100.00522.96
8.2.150.0000.00825.66
8.2.140.0070.00024.66
8.2.130.0050.00226.16
8.2.120.0040.00421.17
8.2.110.0060.00320.38
8.2.100.0090.00319.77
8.2.90.0000.00817.75
8.2.80.0000.00918.73
8.2.70.0040.00417.63
8.2.60.0040.00417.63
8.2.50.0080.00018.05
8.2.40.0040.00418.04
8.2.30.0000.00718.10
8.2.20.0080.00018.00
8.2.10.0000.00819.28
8.2.00.0000.00819.04
8.1.280.0130.00625.92
8.1.270.0030.00523.99
8.1.260.0050.00326.35
8.1.250.0030.00328.09
8.1.240.0080.00023.75
8.1.230.0110.00021.05
8.1.220.0070.00017.74
8.1.210.0080.00018.77
8.1.200.0030.00517.13
8.1.190.0000.00917.23
8.1.180.0000.00818.10
8.1.170.0030.00518.88
8.1.160.0030.00518.76
8.1.150.0040.00418.75
8.1.140.0040.00418.79
8.1.130.0030.00320.17
8.1.120.0040.00417.46
8.1.110.0030.00717.31
8.1.100.0000.00817.44
8.1.90.0040.00417.45
8.1.80.0070.00017.42
8.1.70.0000.00717.43
8.1.60.0040.00417.61
8.1.50.0000.00717.53
8.1.40.0000.00817.33
8.1.30.0080.00017.55
8.1.20.0030.00517.61
8.1.10.0000.00817.48
8.1.00.0000.00817.44
8.0.300.0070.00018.77
8.0.290.0060.00316.75
8.0.280.0030.00518.42
8.0.270.0080.00017.92
8.0.260.0000.00618.55
8.0.250.0050.00216.85
8.0.240.0030.00316.80
8.0.230.0000.00716.93
8.0.220.0030.00316.79
8.0.210.0000.00816.86
8.0.200.0040.00416.92
8.0.190.0040.00416.94
8.0.180.0050.00316.92
8.0.170.0000.00816.88
8.0.160.0040.00416.81
8.0.150.0040.00416.82
8.0.140.0080.00016.85
8.0.130.0000.00613.28
8.0.120.0040.00416.71
8.0.110.0050.00216.77
8.0.100.0020.00516.87
8.0.90.0040.00316.70
8.0.80.0090.00716.79
8.0.70.0040.00416.77
8.0.60.0000.00716.77
8.0.50.0000.00716.87
8.0.30.0090.00616.83
8.0.20.0040.01516.77
8.0.10.0210.01817.10
8.0.00.0180.00717.05
7.4.330.0020.00215.55
7.4.320.0040.00416.53
7.4.300.0040.00416.43
7.4.290.0040.00416.41
7.4.280.0020.00816.39
7.4.270.0030.00316.38
7.4.260.0050.00013.19
7.4.250.0000.00816.29
7.4.240.0000.00816.54
7.4.230.0080.00016.55
7.4.220.0050.00216.50
7.4.210.0090.00716.51
7.4.200.0070.00016.63
7.4.140.0140.01116.33
7.4.130.0170.01116.43
7.4.120.0110.01416.13
7.4.110.0290.01216.58
7.4.100.0080.01216.44
7.4.90.0030.01516.25
7.4.80.0080.01216.33
7.4.70.0100.01516.37
7.4.60.0090.01716.34
7.4.50.0170.00716.24
7.4.40.0130.01316.00
7.4.30.0170.01016.32
7.4.20.0170.00716.27
7.4.10.0150.01016.27
7.4.00.0150.00816.36
7.3.330.0000.00716.19
7.3.320.0050.00013.09
7.3.310.0070.00316.27
7.3.300.0030.00316.19
7.3.290.0060.00716.21
7.3.260.0220.00416.16
7.3.250.0140.01416.49
7.3.240.0180.02116.21
7.3.230.0120.00816.24
7.3.220.0140.00716.16
7.3.210.0100.01216.37
7.3.200.0100.01016.26
7.3.190.0180.00916.12
7.3.180.0110.01416.34
7.3.170.0200.00716.41
7.3.160.0180.00816.20
7.3.150.0150.00915.88
7.3.140.0160.00816.44
7.3.130.0150.00816.04
7.3.120.0030.02116.41
7.3.110.0070.01516.34
7.3.100.0280.00916.32
7.3.90.0350.00316.34
7.3.80.0080.01616.08
7.3.70.0140.01416.22
7.3.60.0180.00916.26
7.3.50.0110.01116.00
7.3.40.0100.01016.30
7.3.30.0140.00716.08
7.3.20.0160.00416.26
7.3.10.0080.01516.12
7.3.00.0210.00516.20

preferences:
58.88 ms | 400 KiB | 5 Q