3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(); $a["100"] = true; echo "$a is an associative map: "; var_export($a); $keys = array_keys($a); echo "It has these keys: "; var_export($keys); var_dump( is_string($keys[0]) );

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)
8.3.40.0000.01718.70
8.3.30.0110.00318.87
8.3.20.0140.00020.16
8.3.10.0040.00423.64
8.3.00.0000.00820.77
8.2.170.0110.00422.96
8.2.160.0150.00320.52
8.2.150.0040.00424.18
8.2.140.0030.00524.66
8.2.130.0040.00426.16
8.2.120.0110.00019.18
8.2.110.0090.00022.13
8.2.100.0070.00417.84
8.2.90.0000.00719.17
8.2.80.0040.00417.97
8.2.70.0080.00017.62
8.2.60.0060.00618.03
8.2.50.0040.00418.07
8.2.40.0000.00818.16
8.2.30.0040.00418.30
8.2.20.0070.00017.62
8.2.10.0050.00318.11
8.2.00.0080.00019.44
8.1.270.0090.00022.23
8.1.260.0070.00026.35
8.1.250.0040.00428.09
8.1.240.0040.00423.79
8.1.230.0000.01118.98
8.1.220.0060.00317.79
8.1.210.0040.00418.77
8.1.200.0040.00417.35
8.1.190.0080.00017.13
8.1.180.0060.00318.10
8.1.170.0000.00818.57
8.1.160.0050.00321.95
8.1.150.0040.00418.49
8.1.140.0040.00417.38
8.1.130.0030.00317.74
8.1.120.0080.00017.46
8.1.110.0050.00217.39
8.1.100.0040.00417.29
8.1.90.0040.00417.30
8.1.80.0030.00317.43
8.1.70.0000.00717.41
8.1.60.0060.00317.54
8.1.50.0080.00017.45
8.1.40.0000.00717.36
8.1.30.0000.00817.54
8.1.20.0040.00417.54
8.1.10.0040.00417.56
8.1.00.0040.00417.54
8.0.300.0070.00018.77
8.0.290.0030.00716.88
8.0.280.0070.00018.44
8.0.270.0000.00717.25
8.0.260.0000.00617.26
8.0.250.0000.00817.03
8.0.240.0030.00317.00
8.0.230.0040.00417.08
8.0.220.0050.00316.88
8.0.210.0030.00316.84
8.0.200.0000.00716.99
8.0.190.0020.00516.98
8.0.180.0040.00416.98
8.0.170.0040.00416.95
8.0.160.0000.00816.95
8.0.150.0000.00816.89
8.0.140.0000.00816.91
8.0.130.0050.00013.31
8.0.120.0040.00416.95
8.0.110.0060.00316.81
8.0.100.0040.00416.74
8.0.90.0050.00216.82
8.0.80.0090.00616.91
8.0.70.0050.00217.04
8.0.60.0030.00316.99
8.0.50.0050.00216.99
8.0.30.0100.00717.01
8.0.20.0120.00717.40
8.0.10.0070.00016.84
8.0.00.0110.00816.91
7.4.330.0020.00215.03
7.4.320.0000.00816.44
7.4.300.0040.00416.34
7.4.290.0000.00716.57
7.4.280.0000.00716.50
7.4.270.0000.00716.46
7.4.260.0000.00716.53
7.4.250.0000.00716.50
7.4.240.0040.00316.48
7.4.230.0030.00316.60
7.4.220.0060.01016.49
7.4.210.0040.01216.57
7.4.200.0040.00416.44
7.4.160.0080.00816.56
7.4.150.0070.01117.40
7.4.140.0090.01217.86
7.4.130.0100.00716.45
7.4.120.0110.00816.43
7.4.110.0100.00716.55
7.4.100.0030.01516.44
7.4.90.0030.01416.43
7.4.80.0090.00919.39
7.4.70.0060.01116.57
7.4.60.0060.01016.69
7.4.50.0030.00616.42
7.4.40.0110.00716.36
7.4.30.0080.00816.60
7.4.00.0090.00615.09
7.3.330.0060.00013.25
7.3.320.0000.00513.16
7.3.310.0030.00516.42
7.3.300.0000.00716.23
7.3.290.0130.00616.38
7.3.280.0060.01316.36
7.3.270.0100.00717.40
7.3.260.0200.00316.47
7.3.250.0150.00316.48
7.3.240.0090.00816.47
7.3.230.0040.01916.39
7.3.210.0090.00916.44
7.3.200.0130.00719.39
7.3.190.0080.01216.52
7.3.180.0080.00816.65
7.3.170.0050.01916.62
7.3.160.0040.01216.63
7.3.120.0060.00615.07
7.2.330.0070.01116.44
7.2.320.0100.01316.58
7.2.310.0030.01316.87
7.2.300.0130.00716.77
7.2.290.0100.00816.51
7.2.60.0130.00816.31
7.2.00.0060.00619.60
7.1.200.0000.01315.86
7.1.100.0060.00917.91
7.1.70.0040.00416.86
7.1.60.0050.00517.24
7.1.50.0090.01317.09
7.1.00.0070.07322.43
7.0.200.0030.00516.46
7.0.140.0000.06721.96
7.0.100.0130.07019.93
7.0.90.0000.05319.98
7.0.80.0070.08019.89
7.0.70.0130.03319.91
7.0.60.0070.04719.96
7.0.50.0070.06020.31
7.0.40.0170.06020.18
7.0.30.0070.08720.19
7.0.20.0170.07720.15
7.0.10.0100.08320.06
7.0.00.0100.08020.09
5.6.280.0070.04321.02
5.6.250.0070.05020.72
5.6.240.0070.07720.56
5.6.230.0070.08320.56
5.6.220.0070.04720.70
5.6.210.0130.07020.61
5.6.200.0100.08721.00
5.6.190.0170.07320.95
5.6.180.0170.07021.03
5.6.170.0130.08021.07
5.6.160.0100.08321.07
5.6.150.0130.07720.91
5.6.140.0130.04321.00
5.6.130.0100.06721.07
5.6.120.0070.07721.02
5.6.110.0070.09021.02
5.6.100.0070.05321.11
5.6.90.0030.05020.92
5.6.80.0000.04320.41
5.6.70.0000.04320.54
5.6.60.0030.04320.39
5.6.50.0030.04020.39
5.6.40.0030.04020.36
5.6.30.0070.04020.36
5.6.20.0030.06720.29
5.6.10.0070.04020.43
5.6.00.0030.06320.27
5.5.380.0030.05320.49
5.5.370.0170.07320.53
5.5.360.0100.08020.34
5.5.350.0030.07320.45
5.5.340.0070.04720.75
5.5.330.0070.07020.91
5.5.320.0100.04020.91
5.5.310.0130.07320.88
5.5.300.0200.06720.91
5.5.290.0030.08320.89
5.5.280.0100.08320.63
5.5.270.0100.04320.82
5.5.260.0070.04020.82
5.5.250.0070.04020.59
5.5.240.0070.03720.21
5.5.230.0030.04320.20
5.5.220.0070.03720.24
5.5.210.0070.03720.26
5.5.200.0000.04320.24
5.5.190.0070.03720.26
5.5.180.0000.04720.11
5.5.160.0000.05020.25
5.5.150.0100.05720.23
5.5.140.0000.04020.20
5.5.130.0030.04320.23
5.5.120.0070.03720.23
5.5.110.0030.04020.26
5.5.100.0070.04320.09
5.5.90.0070.03720.14
5.5.80.0000.04320.05
5.5.70.0130.02720.14
5.5.60.0000.04020.05
5.5.50.0100.03719.99
5.5.40.0030.03720.10
5.5.30.0000.04320.04
5.5.20.0070.04320.04
5.5.10.0000.04320.06
5.5.00.0000.04320.02
5.4.450.0130.06719.45
5.4.440.0000.06319.36
5.4.430.0000.04319.38
5.4.420.0070.04019.29
5.4.410.0000.05319.22
5.4.400.0000.04018.79
5.4.390.0070.04018.90
5.4.380.0100.05319.07
5.4.370.0070.04318.94
5.4.360.0000.04018.79
5.4.350.0070.03719.07
5.4.340.0030.04019.07
5.4.320.0100.06318.95
5.4.310.0030.03719.14
5.4.300.0070.03718.90
5.4.290.0000.04019.09
5.4.280.0000.05018.97
5.4.270.0030.03719.05
5.4.260.0000.04019.02
5.4.250.0100.03718.93
5.4.240.0000.05319.11
5.4.230.0000.04019.04
5.4.220.0030.03718.96
5.4.210.0100.05719.08
5.4.200.0070.03018.78
5.4.190.0030.06019.06
5.4.180.0030.03718.80
5.4.170.0070.03718.93
5.4.160.0000.04018.79
5.4.150.0070.03319.10
5.4.140.0030.03716.37
5.4.130.0070.05716.30
5.4.120.0030.03716.33
5.4.110.0000.04016.30
5.4.100.0030.08016.23
5.4.90.0070.06316.44
5.4.80.0000.06016.20
5.4.70.0100.07016.43
5.4.60.0070.06716.19
5.4.50.0030.05016.39
5.4.40.0100.06716.23
5.4.30.0100.06716.18
5.4.20.0100.07016.28
5.4.10.0070.08016.41
5.4.00.0070.07315.81
5.3.290.0070.04014.62
5.3.280.0130.03014.44
5.3.270.0030.03714.46
5.3.260.0000.04014.60
5.3.250.0070.03314.54
5.3.240.0070.03714.46
5.3.230.0070.03014.59
5.3.220.0030.03714.40
5.3.210.0070.03714.42
5.3.200.0100.03714.55
5.3.190.0000.08014.55
5.3.180.0100.07314.42
5.3.170.0100.03314.39
5.3.160.0170.05714.43
5.3.150.0070.03714.57
5.3.140.0030.07314.41
5.3.130.0130.07014.49
5.3.120.0100.04314.51
5.3.110.0070.07314.51
5.3.100.0130.06313.95
5.3.90.0000.07713.85
5.3.80.0130.06713.92
5.3.70.0070.04013.98
5.3.60.0070.07013.99
5.3.50.0030.07313.90
5.3.40.0030.07713.93
5.3.30.0030.04313.77
5.3.20.0030.07313.45
5.3.10.0070.07013.52
5.3.00.0100.06713.62
5.2.170.0000.04312.11
5.2.160.0030.05012.11
5.2.150.0030.06312.11
5.2.140.0030.06312.11
5.2.130.0070.06312.11
5.2.120.0030.05312.11
5.2.110.0030.04312.11
5.2.100.0130.03712.11
5.2.90.0070.04312.11
5.2.80.0100.03012.11
5.2.70.0000.07012.11
5.2.60.0100.04312.11
5.2.50.0030.06312.11
5.2.40.0100.06012.11
5.2.30.0000.06312.11
5.2.20.0070.04712.11
5.2.10.0070.05312.11
5.2.00.0070.05712.11
5.1.60.0030.05012.11
5.1.50.0130.04312.11
5.1.40.0070.05312.11
5.1.30.0030.06012.11
5.1.20.0000.04012.11
5.1.10.0070.03312.11
5.1.00.0030.05312.11
5.0.50.0030.04712.11
5.0.40.0070.04312.11
5.0.30.0000.06312.11
5.0.20.0000.04712.11
5.0.10.0100.05012.11
5.0.00.0070.06012.11
4.4.90.0000.04012.11
4.4.80.0030.03312.11
4.4.70.0030.02312.11
4.4.60.0000.02312.11
4.4.50.0100.02712.11
4.4.40.0000.05312.11
4.4.30.0000.03012.11
4.4.20.0000.03712.11
4.4.10.0000.03712.11
4.4.00.0000.04312.11
4.3.110.0070.02712.11
4.3.100.0000.03712.11
4.3.90.0030.03012.11
4.3.80.0030.02712.11
4.3.70.0130.02312.11
4.3.60.0070.03012.11
4.3.50.0070.02012.11
4.3.40.0000.05312.11
4.3.30.0000.03712.11
4.3.20.0030.03312.11
4.3.10.0000.02012.11
4.3.00.0000.02712.11

preferences:
43.87 ms | 400 KiB | 5 Q