minor #36078 [Uid] work around slow generation of v4 UUIDs (nicolas-grekas)
This PR was merged into the 5.1-dev branch.
Discussion
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[Uid] work around slow generation of v4 UUIDs
| Q | A
| ------------- | ---
| Branch? | master
| Bug fix? | no
| New feature? | no
| Deprecations? | no
| Tickets | -
| License | MIT
| Doc PR | -
This is more than 4 times faster than `uuid_create()` for v4.
As described in https://jolicode.com/blog/uuid-generation-in-php
Commits
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a0e8d24144
[Uid] work around slow generation of v4 UUIDs
This commit is contained in:
commit
00aab67e6b
@ -25,7 +25,12 @@ class UuidV4 extends Uuid
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public function __construct(string $uuid = null)
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{
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if (null === $uuid) {
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$this->uuid = uuid_create(static::TYPE);
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$uuid = random_bytes(16);
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$uuid[6] = $uuid[6] & "\x0F" | "\x4F";
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$uuid[8] = $uuid[8] & "\x3F" | "\x80";
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$uuid = bin2hex($uuid);
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$this->uuid = substr($uuid, 0, 8).'-'.substr($uuid, 8, 4).'-'.substr($uuid, 12, 4).'-'.substr($uuid, 16, 4).'-'.substr($uuid, 20, 12);
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} else {
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parent::__construct($uuid);
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}
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