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Solution to the problem that PHP array consumes too much memory_PHP tutorial
- WBOYOriginal
- 2016-07-21 15:39:02974browse
Because this is a language problem, conventional solutions are more difficult to solve. The following is a solution through string.
Copy code The code is as follows:
$total = 100000;
$double = "";
for ($i = 0; $i < $total; $i++)
{
$double .= pack("d", $i + 0.1);
}
for ($i = 0; $i < $total; $i++)
{
unpack("@" . ($i * 8) . "/d", $double);
}
This example uses a string to save an array of doubles. Then unpack it when using it.
Of course, this will impact performance. It depends on the specific needs.
For example, in this case:
You have 10 arrays, each array is 10M (about 1 million data), then ten will cost 100M of memory.
If you add 10 people concurrently, the memory will be seriously insufficient.
Then, among the 10 arrays, they are not used at the same time every time. You can save them as strings
and then, when using, unpack a certain string into an array.
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