- []
- +=
- array_push()
| 使用したもの | 実行速度 (秒) |
|---|---|
[] |
0.10734009742737 |
+= |
0.13818192481995 |
array_push() |
0.14035105705261 |
- +=
- array_merge()
- []
| 使用したもの | 実行速度 (秒) |
|---|---|
+= |
0.15385508537292 |
array_merge() |
0.24352407455444 |
[] |
0.25776886940002 |
Last active
February 27, 2020 06:19
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PHPで配列追加速度調査
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| <?php | |
| // []で配列追加 | |
| $array = array(0, 1, 2, 3, 4, 5); | |
| $time_start = microtime(true); | |
| for ($i=6; $i < 500000; $i++) { | |
| $array[] = $i; | |
| } | |
| $time = microtime(true) - $time_start; | |
| echo "{$time} 秒\n"; // 0.10734009742737 秒 | |
| // +=で配列追加 | |
| $array = array(0, 1, 2, 3, 4, 5); | |
| $time_start = microtime(true); | |
| for ($i=6; $i < 500000; $i++) { | |
| $array += array($i => $i); | |
| } | |
| $time = microtime(true) - $time_start; | |
| echo "{$time} 秒\n"; // 0.13818192481995 秒 | |
| // array_push()で配列追加 | |
| $array = array(0, 1, 2, 3, 4, 5); | |
| $time_start = microtime(true); | |
| for ($i=6; $i < 500000; $i++) { | |
| array_push($array, $i); | |
| } | |
| $time = microtime(true) - $time_start; | |
| echo "{$time} 秒\n"; // 0.14035105705261 秒 | |
| // 結果 | |
| // 1. [] 0.10734009742737 秒 | |
| // 2. += 0.13818192481995 秒 | |
| // 3. array_push() 0.14035105705261 秒 |
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| <?php | |
| ini_set('memory_limit', '256M'); | |
| // +=で配列追加 | |
| $array = array(0, 1, 2, 3, 4, 5); | |
| $time_start = microtime(true); | |
| for ($i=6; $i < 500000; $i++) { | |
| $array += array($i => $i); | |
| } | |
| $time = microtime(true) - $time_start; | |
| echo "{$time} 秒\n"; // 0.15385508537292 秒 | |
| // array_merge()で配列追加 | |
| $array = array(0, 1, 2, 3, 4, 5); | |
| $time_start = microtime(true); | |
| for ($i=6; $i < 500000; $i++) { | |
| array_merge($array, array($i => $i)); | |
| } | |
| $time = microtime(true) - $time_start; | |
| echo "{$time} 秒\n"; // 0.24352407455444 秒 | |
| // []で配列追加 | |
| $array = array(0, 1, 2, 3, 4, 5); | |
| $time_start = microtime(true); | |
| for ($i=6; $i < 500000; $i++) { | |
| $array[] = array($i => $i); | |
| } | |
| $time = microtime(true) - $time_start; | |
| echo "{$time} 秒\n"; // 0.25776886940002 秒 | |
| // 結果 | |
| // 1. += 0.15385508537292 秒 | |
| // 2. array_merge() 0.24352407455444 秒 | |
| // 3. [] 0.25776886940002 秒 |
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