3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = null; $b = isset($a); var_dump $b;

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)
5.4.320.0530.03615.82
5.4.310.0490.03815.85
5.4.300.0320.04015.84
5.4.290.0450.03415.87
5.4.280.0270.04015.81
5.4.270.0310.03615.61
5.4.260.0460.03515.81
5.4.250.0240.03615.80
5.4.240.0510.04015.63
5.4.230.0130.03415.84
5.4.220.0250.03015.66
5.4.210.0410.03115.81
5.4.200.0250.03115.73
5.4.190.0320.03315.68
5.4.180.0470.03215.61
5.4.170.0460.03615.61
5.4.160.0430.03315.79
5.4.150.0330.03415.60
5.4.140.0560.03714.31
5.4.130.0650.03114.22
5.4.120.0350.03314.25
5.4.110.0540.03514.21
5.4.100.0320.02814.26
5.4.90.0210.03514.10
5.4.80.0290.03614.29
5.4.70.0240.03214.26
5.4.60.0280.04114.26
5.4.50.0340.04314.24
5.4.40.0400.03514.09
5.4.30.0220.03914.27
5.4.20.0380.03214.23
5.4.10.0560.03714.30
5.4.00.0260.03313.61
5.3.290.0320.03713.74
5.3.280.0600.03513.63
5.3.270.0280.03313.60
5.3.260.0500.03513.64
5.3.250.0400.03013.71
5.3.240.0370.04013.66
5.3.230.0540.03913.57
5.3.220.0430.03313.60
5.3.210.0410.03113.65
5.3.200.0520.03313.54
5.3.190.0400.03413.54
5.3.180.0560.03313.59
5.3.170.0280.03613.53
5.3.160.0450.03213.54
5.3.150.0170.03613.67
5.3.140.0400.03413.53
5.3.130.0260.03713.60
5.3.120.0500.03013.55
5.3.110.0520.03813.58
5.3.100.0270.03413.13
5.3.90.0450.03213.03
5.3.80.0360.03613.05
5.3.70.0400.03212.95
5.3.60.0380.03112.96
5.3.50.0320.03312.95
5.3.40.0540.03712.95
5.3.30.0510.03212.99
5.3.20.0470.03112.63
5.3.10.0460.03212.65
5.3.00.0400.03412.68
5.2.170.0350.02710.08
5.2.160.0220.02810.09
5.2.150.0310.02710.12
5.2.140.0660.02710.07
5.2.130.0320.03910.09
5.2.120.0360.02710.05
5.2.110.0470.02610.05
5.2.100.0320.03110.05
5.2.90.0100.03010.05
5.2.80.0240.03110.04
5.2.70.0160.02710.04
5.2.60.0140.03110.08
5.2.50.0280.0299.99
5.2.40.0170.02610.05
5.2.30.0240.0279.96
5.2.20.0360.0279.93
5.2.10.0300.0289.86
5.2.00.0380.0259.76
5.1.60.0360.0268.99
5.1.50.0300.0229.02
5.1.40.0380.0198.96
5.1.30.0220.0249.39
5.1.20.0420.0219.36
5.1.10.0340.0269.04
5.1.00.0070.0299.15
5.0.50.0220.0167.72
5.0.40.0040.0177.65
5.0.30.0160.0277.55
5.0.20.0180.0177.54
5.0.10.0030.0217.53
5.0.00.0240.0267.52
4.4.90.0110.0146.79
4.4.80.0170.0146.78
4.4.70.0100.0176.78
4.4.60.0140.0136.79
4.4.50.0090.0166.79
4.4.40.0050.0226.76
4.4.30.0130.0156.79
4.4.20.0140.0176.83
4.4.10.0200.0156.83
4.4.00.0140.0256.78
4.3.110.0180.0136.74
4.3.100.0100.0166.74
4.3.90.0090.0136.72
4.3.80.0090.0226.70
4.3.70.0150.0206.72
4.3.60.0070.0136.72
4.3.50.0130.0166.72
4.3.40.0030.0236.68
4.3.30.0020.0136.05
4.3.20.0020.0206.04
4.3.10.0130.0146.02
4.3.00.0070.0138.81

preferences:
141.03 ms | 1394 KiB | 7 Q