Online PHP editor | perf for VCa0c

<?php // Crate json string contain 50000 objecy $locations = ""; for ($i=0; $i<50000; $i++){ $locations .= "{\"location\":\"$i\",\"distance\":\"25.75206\"},"; } $json = "[".substr($locations, 0, -1)."]"; $location = '100'; // Using json_decode and loop $time = microtime(true); $locations = json_decode($json, true); foreach ($locations as $key => $value) { if ($value['location'] == $location) { @$distance = $value['distance']; } } echo "json_decode and loop:\n".(microtime(true) - $time)."\n"; // Using regex $time2 = microtime(true); if (preg_match("/\{\s*\"location\"\s*:\s*\"{$location}\".*?}/", $json, $match)){ $locations = json_decode("[{$match[0]}]", true)[0]; $distance = $locations['distance']; } echo "regex: \n".(microtime(true) - $time2);

Version	System time (s)	User time (s)	Memory (MiB)
8.2.28	0.057	0.036	46.63
8.1.3	0.044	0.033	46.50
7.3.0	0.411	0.053	45.73
7.2.13	0.449	0.046	45.54
7.2.12	0.401	0.043	46.11
7.2.11	0.740	0.066	45.84
7.2.10	0.609	0.057	46.20
7.2.9	0.640	0.050	45.97
7.2.8	0.900	0.050	46.13
7.2.7	0.610	0.067	45.99
7.2.6	0.575	0.066	46.07
7.2.5	0.636	0.057	46.08
7.2.4	0.605	0.053	46.14
7.2.3	0.695	0.050	46.04
7.2.2	0.853	0.060	45.78
7.2.1	0.901	0.066	45.80
7.2.0	1.184	0.056	46.20
7.1.25	0.360	0.056	44.66
7.0.33	0.537	0.040	44.80
5.6.38	0.050	0.147	55.11

Version

System time (s)

User time (s)

Memory (MiB)

8.2.28

0.057

0.036

46.63

8.1.3

0.044

0.033

46.50

7.3.0

0.411

0.053

45.73

7.2.13

0.449

0.046

45.54

7.2.12

0.401

0.043

46.11

7.2.11

0.740

0.066

45.84

7.2.10

0.609

0.057

46.20

7.2.9

0.640

0.050

45.97

7.2.8

0.900

0.050

46.13

7.2.7

0.610

0.067

45.99

7.2.6

0.575

0.066

46.07

7.2.5

0.636

0.057

46.08

7.2.4

0.605

0.053

46.14

7.2.3

0.695

0.050

46.04

7.2.2

0.853

0.060

45.78

7.2.1

0.901

0.066

45.80

7.2.0

1.184

0.056

46.20

7.1.25

0.360

0.056

44.66

7.0.33

0.537

0.040

44.80

5.6.38

0.050

0.147

55.11