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[Uid] work around slow generation of v4 UUIDs

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This commit is contained in:
Nicolas Grekas 2020-03-15 01:46:42 +01:00
parent 7dc6da6c26
commit a0e8d24144
1 changed files with 6 additions and 1 deletions
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7
src/Symfony/Component/Uid/UuidV4.php
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@ -25,7 +25,12 @@ class UuidV4 extends Uuid
public function __construct(string $uuid = null)
{
if (null === $uuid) {
$this->uuid = uuid_create(static::TYPE);
$uuid = random_bytes(16);
$uuid[6] = $uuid[6] & "\x0F" | "\x4F";
$uuid[8] = $uuid[8] & "\x3F" | "\x80";
$uuid = bin2hex($uuid);
$this->uuid = substr($uuid, 0, 8).'-'.substr($uuid, 8, 4).'-'.substr($uuid, 12, 4).'-'.substr($uuid, 16, 4).'-'.substr($uuid, 20, 12);
} else {
parent::__construct($uuid);
}