3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $x = str_repeat('foo', 5000); $y = 'bar'; $before = microtime(1); $x = $x . $y; var_dump(microtime(1) - $before);
Output for 7.1.0
float(2.1457672119141E-6)
Output for 7.0.2, 7.0.14
float(3.0994415283203E-6)
Output for 5.0.4, 5.1.0, 5.3.1, 5.4.3, 5.4.36, 5.4.38, 5.6.28, 7.0.6
float(7.1525573730469E-6)
Output for 5.0.1, 5.1.1 - 5.1.2, 5.1.4, 5.1.6, 5.2.5, 5.2.7, 5.2.12, 5.2.14, 5.2.17, 5.3.4, 5.3.6 - 5.3.8, 5.3.15, 5.3.19, 5.3.24, 5.4.0 - 5.4.1, 5.4.5, 5.4.7 - 5.4.8, 5.4.10 - 5.4.12, 5.4.14, 5.4.17, 5.4.22 - 5.4.23, 5.4.26, 5.4.28 - 5.4.29, 5.4.32, 5.4.35, 5.4.40, 5.4.42 - 5.4.45, 5.5.35, 5.6.10, 5.6.13, 5.6.15, 5.6.18, 7.0.5
float(5.9604644775391E-6)
Output for 7.0.4
float(2.8610229492188E-6)
Output for 7.0.0, 7.0.3
float(9.5367431640625E-7)
Output for 7.0.1
float(1.9073486328125E-6)
Output for 5.0.0, 5.3.12, 5.5.24, 5.5.27, 5.5.33 - 5.5.34, 5.6.11, 5.6.16, 5.6.21
float(9.0599060058594E-6)
Output for 5.0.5, 5.6.12, 5.6.14, 5.6.20
float(1.0013580322266E-5)
Output for 5.2.15, 5.3.13, 5.3.22, 5.3.25, 5.4.2, 5.4.4, 5.4.9, 5.4.34, 5.4.37, 5.4.41, 5.5.28, 5.6.19
float(6.9141387939453E-6)
Output for 5.0.2, 5.1.3, 5.2.6, 5.2.10, 5.3.0, 5.3.2 - 5.3.3, 5.3.5, 5.3.9 - 5.3.10, 5.3.17 - 5.3.18, 5.3.20 - 5.3.21, 5.3.26, 5.3.29, 5.4.13, 5.4.15 - 5.4.16, 5.4.18 - 5.4.21, 5.4.24, 5.4.27, 5.4.30 - 5.4.31, 5.4.39, 5.6.17
float(5.0067901611328E-6)
Output for 5.0.3, 5.3.23, 5.4.6, 5.6.8 - 5.6.9
float(8.8214874267578E-6)
Output for 5.2.1 - 5.2.2, 5.5.26, 5.5.29 - 5.5.32
float(7.8678131103516E-6)
Output for 5.5.25
float(1.1920928955078E-5)
Output for 5.1.5, 5.2.3, 5.2.13, 5.3.11, 5.3.16, 5.4.25
float(6.1988830566406E-6)
Output for 5.2.8 - 5.2.9, 5.2.11, 5.3.14, 5.3.27 - 5.3.28
float(4.0531158447266E-6)
Output for 5.2.16
float(8.1062316894531E-6)
Output for 5.2.4
float(1.0967254638672E-5)
Output for 5.2.0
float(3.814697265625E-6)
Output for 4.3.10, 4.4.2, 4.4.9
float(1.0999999999983E-5)
Output for 4.3.3, 4.4.0, 4.4.4, 4.4.8
float(1.8999999999991E-5)
Output for 4.4.7
float(1.6999999999934E-5)
Output for 4.3.1, 4.4.6
float(1.4999999999987E-5)
Output for 4.4.5
float(2.0000000000006E-5)
Output for 4.3.5, 4.4.3
float(1.6000000000016E-5)
Output for 4.4.1
float(1.1999999999956E-5)
Output for 4.3.11
float(2.1999999999966E-5)
Output for 4.3.8 - 4.3.9
float(1.7000000000045E-5)
Output for 4.3.7
float(1.1000000000094E-5)
Output for 4.3.6
float(1.9999999999992E-5)
Output for 4.3.4
float(1.6999999999989E-5)
Output for 4.3.2
float(1.4000000000014E-5)
Output for 4.3.0
float(1.2000000000012E-5)