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spec
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The UX of UUIDs
Can use ULID to "fix" some issues
https://github.com/ulid/spec
- Ulid: Universally Unique Lexicographically Sortable Identifier
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Ask HN: Is it acceptable to use a date as a primary key for a table in Postgres?
Both ULID and UUID v7 have a time code component which can be extracted.
It would be best for indexing to store the actual value in binary, though not strictly necessary as these later UUID standards (unlike conventional UUIDs) use time code prefixes (so indexing clusters.)
https://uuid7.com/
https://github.com/ulid/spec
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Bye Sequence, Hello UUIDv7
UUIDv7 is a nice idea, and should probably be what people use by default instead of UUIDv4.
For the curious:
* UUIDv4 are 128 bits long, 122 bits of which are random, with 6 bits used for the version. Traditionally displayed as 32 hex characters with 4 dashes, so 36 alphanumeric characters, and compatible with anything that expects a UUID.
* UUIDv7 are 128 bits long, 48 bits encode a unix timestamp with millisecond precision, 6 bits are for the version, and 74 bits are random. You're expected to display them the same as other UUIDs, and should be compatible with basically anything that expects a UUID. (Would be a very odd system that parses a UUID and throws an error because it doesn't recognise v7, but I guess it could happen, in theory?)
* ULIDs (https://github.com/ulid/spec) are 128 bits long, 48 bits encode a unix timestamp with millisecond precision, 80 bits are random. You're expected to display them in Crockford's base32, so 26 alphanumeric characters. Compatible with almost everything that expects a UUID (since they're the right length). Spec has some dumb quirks if followed literally but thankfully they mostly don't hurt things.
* KSUIDs (https://github.com/segmentio/ksuid) are 160 bits long, 32 bits encode a timestamp with second precision and a custom epoch of May 13th, 2014, and 128 bits are random. You're expected to display them in base62, so 27 alphanumeric characters. Since they're a different length, they're not compatible with UUIDs.
I quite like KSUIDs; I think base62 is a smart choice. And while the timestamp portion is a trickier question, KSUIDs use 32 bits which, with second precision (more than good enough), means they won't overflow for well over a century. Whereas UUIDv7s use 48 bits, so even with millisecond precision (not needed) they won't overflow for something like 8000 years. We can argue whether 100 years us future proof enough (I'd argue it probably is), but 8000 years is just silly. Nobody will ever generate a compliant UUIDv7 with any of the first several bits aren't 0. The only downside to KSUIDs is the length isn't UUID compatible (and arguably, that they don't devote 6 bits to a compliant UUID version).
Still feels like there's room for improvement, but for now I think I'd always pick UUIDv7 over UUIDv4 unless there's an very specific reason not to.
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50 years later, is Two-Phase Locking the best we can do?
I'd love for Postgres to adopt ULID as a first class variant of the same basic 128bit wide binary optimized column type they use for UUIDs, but I don't expect they will, while its "popular" its not likely popular enough to have support for them to maintain it in the long run... Also the smart money ahead of time would have been for the ULID spec to sacrifice a few data bits to leave the version specifying sections of the bit field layout unused in the ULID binary spec (https://github.com/ulid/spec#binary-layout-and-byte-order) for the sake of future compatibility with "proper" UUIDs... Performing one big bulk bitfield modification to a PostgreSQL column would have been much less painful than re-computing appropriate UUIDv7 (or UUIDv8s for some reason) and then having to perform a primary key update on every row in the table.
- FLaNK Stack Weekly for 12 September 2023
- You Don't Need UUID
- UUID Collision
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Type-safe, K-sortable, globally unique identifier inspired by Stripe IDs
Many people had the same idea. For example ULID https://github.com/ulid/spec is more compact and stores the time so it is lexically ordered.
- ULID: Universally Unique Lexicographically Sortable Identifier
wordpress-playground
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Things you forgot because of React
Sorry friend, WordPress already beat you to it: https://github.com/WordPress/wordpress-playground
- WordPress Playground: A WordPress that runs entirely in the browser
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WordPress Playground: A WordPress that runs in the browser
> Is there a reason why using OPFS directly from SQLite doesn't work?
I'm guessing this means using SQLite WASM's built-in OPFS integration as described in these articles:
- sqlite3 WebAssembly documentation - Persistent Storage Options: OPFS - https://sqlite.org/wasm/doc/trunk/persistence.md#opfs
- SQLite Wasm in the browser backed by the Origin Private File System - https://developer.chrome.com/blog/sqlite-wasm-in-the-browser...
Within the Playground, SQLite interacts with the database file in MEMFS only, and the Playground coordinates the syncing from MEMFS to OPFS.
https://github.com/WordPress/wordpress-playground/tree/trunk...
The reason for this, I believe, is that the primary use case is/was to have the entire file system in memory, including SQLite's database file. This was the original implementation, and is still the default behavior. Persistence was later added as an optional feature.
The good news is that browser support for OPFS seems to be getting better. From the SQLite docs:
As of March 2023 the following browsers are known to have the necessary APIs:
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WordPress Playground
One of the most exciting things at WordCamp Europe 2023 for me was discovering how far along the WordPress Playground project is. If you haven’t heard of the playground before, it’s a full version of WordPress, running directly in your browser!
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WCGI: WebAssembly and CGI
WordPress has an official WebAssembly build for the browser and Node.js: https://developer.wordpress.org/playground https://github.com/WordPress/wordpress-playground
(Disclosure: I'm the creator)
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WordPress testing official SQLite Support
I love the work going on there at WasmLabs, especially enjoying the articles with in-depth technical explorations.
After the article about running WordPress in the browser was published, there's a new project called WordPress Playground which is gradually preparing NPM or Composer packages to make it easier for people to run it.
https://github.com/WordPress/wordpress-playground/
They've been doing very detailed work, like making some patches to PHP and SQLite for improved compatibility with Emscripten, etc. It seems there's a lot of overlap with what WasmLabs has achieved and probably have continued to develop further. Perhaps there's an opportunity for collaboration.
- WordPress WASM
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Hacker News top posts: Sep 25, 2022
WordPress WASM\ (28 comments)
What are some alternatives?
dynamodb-onetable - DynamoDB access and management for one table designs with NodeJS
marmot - A distributed SQLite replicator built on top of NATS
uuid6-ietf-draft - Next Generation UUID Formats
dod - DOS on dope. The last MVC Web framework you'll ever need
kuuid - K-sortable UUID - roughly time-sortable unique id generator
webrcade - Feed-driven gaming
python-ksuid - A pure-Python KSUID implementation
wapm-cli - 📦 WebAssembly Package Manager (CLI)
ulid-lite - Generate unique, yet sortable identifiers
wp-sqlite-db - A single file drop-in for using a SQLite database with WordPress. Based on the original SQLite Integration plugin.
shortuuid.rb - Convert UUIDs & numbers into space efficient and URL-safe Base62 strings, or any other alphabet.
Platform - Qbix Platform for powering Social Apps (http://qbix.com/platform)