3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = "foobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisoutfoobarbizbazbuztestingthisout"; $b = str_repeat("a", 300); echo "Static Var\n"; testCopy($a); echo "Dynamic Var\n"; testCopy($b); $c = mb_substr($a, 0, strlen($c) - 1); echo memory_get_usage() . "\n"; function testCopy($var) { echo memory_get_usage() . "\n"; $var = (string) $var; echo memory_get_usage() . "\n"; }

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)
7.3.120.0070.01017.15
7.3.110.0060.00917.15
7.3.100.0030.01017.15
7.3.90.0040.01117.15
7.3.80.0070.00717.15
7.3.70.0060.00917.15
7.3.60.0090.00317.15
7.3.50.0000.01517.15
7.3.40.0070.00417.15
7.3.30.0040.01217.15
7.3.20.0070.00717.15
7.3.10.0030.00917.15
7.3.00.0080.00417.15
7.2.240.0040.01517.15
7.2.230.0000.00917.15
7.2.220.0110.00417.15
7.2.210.0000.01817.15
7.2.200.0000.00917.15
7.2.190.0040.01117.15
7.2.180.0100.00717.15
7.2.170.0100.00717.15
7.2.160.0110.00317.15
7.2.150.0030.01317.18
7.2.140.0040.01117.15
7.2.130.0070.00717.15
7.2.120.0060.01017.15
7.2.110.0080.00717.15
7.2.100.0040.01417.15
7.2.90.0080.00417.15
7.2.80.0040.01117.15
7.2.70.0070.01017.15
7.2.60.0120.00617.15
7.2.50.0050.00517.15
7.2.40.0000.01417.15
7.2.30.0070.00317.15
7.2.20.0110.00717.15
7.2.10.0070.01017.15
7.2.00.0100.00518.15
7.1.330.0130.00317.15
7.1.320.0040.01117.15
7.1.310.0030.01317.15
7.1.300.0100.00017.15
7.1.290.0060.00917.15
7.1.280.0030.00717.15
7.1.270.0000.01617.15
7.1.260.0070.01017.15
7.1.250.0080.00817.15
7.1.70.0040.00417.20
7.1.60.0070.01819.17
7.1.50.0170.01734.71
7.1.00.0000.03722.31
7.0.200.0020.00516.80
7.0.140.0000.07721.95
7.0.80.0670.08319.98
7.0.70.0430.07020.02
7.0.60.0670.05019.98
7.0.50.0530.07020.40
7.0.40.0130.06720.05
7.0.30.0200.06720.14
7.0.20.0070.08720.04
7.0.10.0030.07720.00
7.0.00.0070.04020.17
5.6.280.0030.07321.12
5.6.230.0100.07720.50
5.6.220.0100.08320.48
5.6.210.0100.07020.64
5.6.200.0170.06021.11
5.6.190.0030.05321.03
5.6.180.0100.08321.05
5.6.170.0130.08021.13
5.6.160.0030.04321.06
5.6.150.0070.07720.94
5.6.140.0100.04321.11
5.6.130.0070.08320.94
5.6.120.0130.05320.95
5.6.110.0100.07721.13
5.6.100.0100.05721.08
5.6.90.0000.09021.03
5.6.80.0100.05320.47
5.6.70.0130.06320.43
5.6.60.0130.06720.40
5.6.50.0130.03720.41
5.6.40.0130.04720.47
5.6.30.0130.07720.38
5.6.20.0030.07720.46
5.6.10.0030.09020.29
5.6.00.0170.07320.29
5.5.370.0100.08020.33
5.5.360.0100.08020.36
5.5.350.0100.07020.39
5.5.340.0100.06320.78
5.5.330.0070.07320.89
5.5.320.0100.08020.84
5.5.310.0070.08720.81
5.5.300.0170.07320.93
5.5.290.0100.08720.83
5.5.280.0100.07720.86
5.5.270.0130.07720.91
5.5.260.0070.09020.80
5.5.250.0100.07720.46
5.5.240.0070.04720.20
5.5.230.0130.07020.30
5.5.220.0130.06720.27
5.5.210.0170.06320.29
5.5.200.0070.04720.27
5.5.190.0030.06720.17
5.5.180.0100.07320.23
5.5.160.0100.05719.99
5.5.150.0070.07720.12
5.5.140.0030.08720.20
5.5.130.0130.07320.25
5.5.120.0130.07020.21
5.5.110.0200.07020.25
5.5.100.0100.07320.18
5.5.90.0100.07720.10
5.5.80.0030.04720.15
5.5.70.0130.07020.04
5.5.60.0000.04319.93
5.5.50.0030.07720.16
5.5.40.0100.07720.07
5.5.30.0030.08020.14
5.5.20.0030.08020.15
5.5.10.0130.07320.05
5.5.00.0000.04720.11
5.4.450.0100.07319.55
5.4.440.0100.07719.46
5.4.430.0030.04719.52
5.4.420.0170.06719.22
5.4.410.0130.07319.43
5.4.400.0100.07319.19
5.4.390.0100.07019.18
5.4.380.0130.06719.08
5.4.370.0070.08019.13
5.4.360.0030.04719.05
5.4.350.0070.07719.13
5.4.340.0070.07319.19
5.4.320.0100.07318.87
5.4.310.0200.06019.04
5.4.300.0070.07319.08
5.4.290.0100.07019.04
5.4.280.0130.07318.84
5.4.270.0170.05719.12
5.4.260.0100.07019.13
5.4.250.0030.07319.22
5.4.240.0030.07319.04
5.4.230.0030.08319.20
5.4.220.0030.04018.85
5.4.210.0100.07319.02
5.4.200.0070.07318.90
5.4.190.0170.07019.17
5.4.180.0130.07319.24
5.4.170.0030.07319.03
5.4.160.0100.06719.20
5.4.150.0070.07718.83
5.4.140.0030.08316.43
5.4.130.0100.06016.43
5.4.120.0170.06016.45
5.4.110.0000.08016.39
5.4.100.0100.04716.55
5.4.90.0030.07716.38
5.4.80.0070.05016.45
5.4.70.0130.04016.34
5.4.60.0030.06316.48
5.4.50.0030.07716.44
5.4.40.0030.07716.49
5.4.30.0030.05316.45
5.4.20.0100.06316.44
5.4.10.0030.06016.40
5.4.00.0130.03015.88
5.3.290.0070.08014.73
5.3.280.0070.05714.53
5.3.270.0030.08314.67
5.3.260.0030.04014.61
5.3.250.0030.06314.56
5.3.240.0070.06014.53
5.3.230.0030.07714.57
5.3.220.0070.08014.50
5.3.210.0170.06714.63
5.3.200.0100.07714.52
5.3.190.0000.07314.60
5.3.180.0100.06714.55
5.3.170.0070.07314.50
5.3.160.0030.08014.61
5.3.150.0100.07014.66
5.3.140.0070.07314.57
5.3.130.0170.07014.47
5.3.120.0030.08014.59
5.3.110.0100.03714.58
5.3.100.0070.03714.18
5.3.90.0030.05014.07
5.3.80.0070.03714.14
5.3.70.0070.03314.00
5.3.60.0000.05713.95
5.3.50.0030.03714.01
5.3.40.0000.04013.97
5.3.30.0030.03713.92
5.3.20.0100.03313.71
5.3.10.0030.03013.67
5.3.00.0130.04313.64
5.2.170.0070.02711.70
5.2.160.0030.02711.70
5.2.150.0100.02311.70
5.2.140.0000.03311.70
5.2.130.0000.03011.70
5.2.120.0000.02711.70
5.2.110.0030.03011.70
5.2.100.0000.03011.70
5.2.90.0070.02311.70
5.2.80.0000.03311.70
5.2.70.0100.01711.70
5.2.60.0100.02011.70
5.2.50.0070.04011.70
5.2.40.0070.04311.70
5.2.30.0030.02311.70
5.2.20.0000.03011.70
5.2.10.0030.02711.70
5.2.00.0000.03011.70
5.1.60.0030.02311.70
5.1.50.0000.03011.70
5.1.40.0030.02011.70
5.1.30.0070.04011.70
5.1.20.0030.04711.70
5.1.10.0030.02311.70
5.1.00.0030.02311.70
5.0.50.0000.04311.70
5.0.40.0030.04311.70
5.0.30.0070.04311.70
5.0.20.0030.02311.70
5.0.10.0030.01711.70
5.0.00.0000.03011.70
4.4.90.0000.01711.70
4.4.80.0000.01711.70
4.4.70.0030.02311.70
4.4.60.0000.02311.70
4.4.50.0030.01311.70
4.4.40.0000.03711.70
4.4.30.0030.02311.70
4.4.20.0000.01711.70
4.4.10.0000.01711.70
4.4.00.0070.02711.70
4.3.110.0000.02011.70
4.3.100.0000.02011.70
4.3.90.0030.01711.70
4.3.80.0000.02311.70
4.3.70.0030.01311.70
4.3.60.0000.03711.70
4.3.50.0070.00711.70
4.3.40.0000.02311.70
4.3.30.0070.01011.70
4.3.20.0030.01311.70
4.3.10.0000.01311.70
4.3.00.0000.01711.70

preferences:
36.07 ms | 400 KiB | 5 Q