The specification reached stage 4 just yesterday. That was the motive behind the blog post :)

I believe V8 / chrome bundles IANA time zones into the zoneinfo64 resource bundle. I'm not actually sure they hit the system tzdb at all.

Yep, temporal_rs is designed with native Rust use in mind, so you should be able to use temporal_rs directly wherever you'd use jiff or chrono.

That being said, the library is designed to be specification conformant and with EcmaScript implementations in mind. There are some specific API choices made specifically for those clients.

That being said, we are always looking for feedback regarding the native Rust API. So feel free to try temporal_rs out and provide whatever feedback you'd like :)

Typically time zone data is updated in IANA's time zone database. That data would need to be updated in the implementation. In this case, the browser would need to update their time zone data.

Super happy to see Temporal accepted!

Congrats to all the champions who worked super hard on this for so long! It's been fun working on temporal_rs for the last couple years :)

The library used for V8's temporal implementation is in Rust too ;)

I don't know if that's totally fair to Chrome. The specification was undergoing a lot of changes at the time, and V8 decided to wait for the specification to stabilize; meanwhile, Anba kept working on the implementation for FireFox. Additionally, the version of Temporal that Deno exposed last year was the heavily out of date to the most recent specification and had a large portion of the specification that was not even implemented.

Yeah, the majority of the difference is from the Unicode data for Intl along with probably the timezone data for Temporal.

Is it possible to build Boa without these APIs?

For the engine, the answer is yes, Intl and Temporal are feature flagged due to the dependencies. What I suspect they’re comparing above is the CLIs, which is completely different than the engine. I’d have to double check for the CLI. If I recall correctly, we include all features in the CLI by default.

Yeah! I found out about Brimstone just the other day! Its definitely interesting! One optimization that they have that Boa needs to implement is ropes for our string type :)

Huh! TIL. I'll have to look into that, I'm curious how it works. Although, now that I think about it, that does make sense.