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<?php final class Sleep { public static function for(Time $duration): void { usleep($duration->microseconds); } } readonly final class Time { public function __construct(public int $microseconds) { } public function add(self $time): self { return self::microseconds($this->microseconds + $time->microseconds); } public static function microseconds(int $duration): self { return new self($duration); } public static function milliseconds(int $duration): self { return new self($duration * 1000); } } function check(bool $a) { $sleep = Time::milliseconds(100); if ($a) { $sleep->add(Time::milliseconds(200)); } Sleep::for($sleep); echo 'CHECK:' . (new DateTime())->format(DateTimeInterface::ATOM); echo PHP_EOL; } echo 'OUTER_TIME: ' . (new DateTime())->format(DateTimeInterface::ATOM); echo PHP_EOL; check(false); echo 'OUTER_TIME: ' . (new DateTime())->format(DateTimeInterface::ATOM); echo PHP_EOL; check(true); echo 'OUTER_TIME: ' . (new DateTime())->format(DateTimeInterface::ATOM); echo PHP_EOL; // expected output: //OUTER_TIME: 2023-12-12T20:26:28+01:00 //Sleeping for 100 μseconds //CHECK:2023-12-12T20:26:28+01:00 // //OUTER_TIME: 2023-12-12T20:26:28+01:00 //Sleeping for 200 μseconds //CHECK:2023-12-12T20:26:28+01:00 // //OUTER_TIME: 2023-12-12T20:26:28+01:00

Version	System time (s)	User time (s)	Memory (MiB)
8.4.12	0.006	0.005	24.17
8.4.11	0.014	0.007	21.80
8.4.10	0.007	0.005	19.03
8.4.9	0.013	0.009	18.78
8.4.8	0.011	0.010	18.88
8.4.7	0.009	0.009	17.91
8.4.6	0.014	0.009	18.99
8.4.5	0.017	0.005	18.61
8.4.4	0.004	0.008	17.78
8.4.3	0.004	0.007	18.77
8.4.2	0.011	0.000	18.10
8.4.1	0.000	0.011	19.40
8.3.25	0.014	0.005	18.93
8.3.24	0.008	0.003	17.18
8.3.23	0.015	0.007	16.70
8.3.22	0.007	0.012	18.95
8.3.21	0.008	0.011	16.99
8.3.20	0.007	0.005	16.78
8.3.19	0.014	0.006	16.96
8.3.18	0.011	0.003	17.09
8.3.17	0.003	0.013	22.71
8.3.16	0.004	0.015	17.48
8.3.15	0.013	0.010	17.34
8.3.14	0.006	0.013	18.88
8.3.13	0.006	0.006	18.46
8.3.12	0.008	0.003	18.79
8.3.11	0.007	0.004	18.66
8.3.10	0.003	0.007	18.33
8.3.5	0.012	0.008	18.30
8.2.29	0.011	0.007	20.17
8.2.28	0.013	0.009	18.36
8.2.27	0.016	0.003	17.42
8.2.26	0.004	0.008	18.37
8.2.25	0.003	0.007	18.46
8.2.24	0.014	0.003	17.32
8.2.23	0.008	0.004	18.54
8.2.22	0.013	0.003	16.57
8.2.6	0.015	0.008	28.09
8.1.33	0.013	0.008	21.82
8.1.32	0.012	0.008	16.31
8.1.31	0.012	0.006	18.66
8.1.30	0.010	0.006	20.06

Version

System time (s)

User time (s)

Memory (MiB)

8.4.12

0.006

0.005

24.17

8.4.11

0.014

0.007

21.80

8.4.10

0.007

0.005

19.03

8.4.9

0.013

0.009

18.78

8.4.8

0.011

0.010

18.88

8.4.7

0.009

17.91

8.4.6

0.014

0.009

18.99

8.4.5

0.017

0.005

18.61

8.4.4

0.004

0.008

17.78

8.4.3

0.004

0.007

18.77

8.4.2

0.011

0.000

18.10

8.4.1

0.000

0.011

19.40

8.3.25

0.014

0.005

18.93

8.3.24

0.008

0.003

17.18

8.3.23

0.015

0.007

16.70

8.3.22

0.007

0.012

18.95

8.3.21

0.008

0.011

16.99

8.3.20

0.007

0.005

16.78

8.3.19

0.014

0.006

16.96

8.3.18

0.011

0.003

17.09

8.3.17

0.003

0.013

22.71

8.3.16

0.004

0.015

17.48

8.3.15

0.013

0.010

17.34

8.3.14

0.006

0.013

18.88

8.3.13

0.006

18.46

8.3.12

0.008

0.003

18.79

8.3.11

0.007

0.004

18.66

8.3.10

0.003

0.007

18.33

8.3.5

0.012

0.008

18.30

8.2.29

0.011

0.007

20.17

8.2.28

0.013

0.009

18.36

8.2.27

0.016

0.003

17.42

8.2.26

0.004

0.008

18.37

8.2.25

0.003

0.007

18.46

8.2.24

0.014

0.003

17.32

8.2.23

0.008

0.004

18.54

8.2.22

0.013

0.003

16.57

8.2.6

0.015

0.008

28.09

8.1.33

0.013

0.008

21.82

8.1.32

0.012

0.008

16.31

8.1.31

0.012

0.006

18.66

8.1.30

0.010

0.006

20.06