![]() ![]() Installs itself on your system in seconds using Java Web Start and automatically.Runs on most major operating systems (anything with Java 1.1 or later,) as an.Now you know everything about the ways to generate UUID in PHP, just use the right one for you.Top Software Keywords Show more Show less something more feature-rich: the ramsey/uuid component,.something simple: the PECL (or the polyfill if you can’t install an extension),.It could be interesting to use the polyfill in the ramsey/uuid implementation.Īnd since the polyfill is the same thing than the PECL extension, the final choice is about the API: Ramsey/uuid is an UUID component that leverage many uuid generator (it can use the PECL internally). Keep in mind that the FFI binding works only with PHP 7.4+, so it’s likely unusable for many projects (for now). Now you now know everything about uuid, so… just make the right choice. The FFI binding is the slowest since it relies on the same libuuid library, and it adds the FFI overhead.The PECL is much slower due to the underlying library ( libuuid) opening a new file descriptor on /dev/urandom each time we call uuid_create() from PHP Code,.The Rasmey implementation is also very fast for the same reason,.PHP uses sys_getrandom() a faster way to get random data. The Polyfill is the fastest because of PHP.It means it is really expensive for the CPU to generate one compared to a V1. UUIDs generated below validates using OSSP UUID Tool, and output for named-based UUIDs are exactly the same. The Rasmey implementation is the slowest because the way it deals with counter could be improved.The Polyfill is slower because it must deal with the counter manually,.This overhead comes from the conversion type between PHP and the underlying library, The FFI binding is slower because there is a significant overhead with FFI for things that are really fast in the underlying library.The PECL is the fastest here because it uses some features of the kernel to get incremental data,.But each UUID must be unique, so an internal counter is required. ![]() It means there are not so much random data. Section intitulée how-to-explain-these-numbersHow to explain these numbers? Section intitulée for-the-v1For the V1 Section intitulée uuid-v4-random-valuesUUID V4 (random values) +-+-+-+ The main point stays the same : the slow part is not the implementation, it's the RFC's lack of order and the way it is used (string vs binary form and ordering, benchmarks here ). I created a benchmark to see how theses implementations compare: Section intitulée uuid-v1-time-basedUUID V1 (time based) +-+-+-+ It's also rather normal to find out that compared implementations, which handles 4 UUID versions and tend to go as deep in RFC as possible, are a bit slower. An abstraction layer on top of many generator and an UUID component: ramsey/uuid.So now, there are many ways to generate UUID in PHP, at least 4. Then, we wanted to blog about FFI, a new PHP 7.4 feature, so with Baptiste Leduc we bound the libuuid to PHP. Few weeks ago, with Nicolas Grekas we had the idea to port the PECL extension to plain PHP as a Symfony Polyfill. I prefer the PECL extension over the ramsey/uuid because it’s simpler and more straightforward. We have been using UUID for years and different ways to generate UUID exist.
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