unicode-org/icu4x
Solving i18n for client-side and resource-constrained environments.
In plain words
Outside PRs: 7 in 10 merged. First reply usually within 2 h. 1 starter issue is available now. Replies got faster this month.
Outside PRs merged
72%
23 merged, 9 closed, 4 still open
Higher than 29% of 565 other measured repositories
First human reply
2 h
median of 36 outside PRs, 2 unanswered
Time to merge
6.9 days
23 of 36 outside PRs merged
Outside PRs opened 30 to 120 days ago, so each has had time to be answered. A figure needs at least 5 pull requests, otherwise it reads "Not enough data". How this is calculated · A number looks wrong?
Your first steps here
If you have never contributed to this project, do these in order.
- 1
Read the contributing guide
It says how to set the project up and what the maintainers expect in a pull request.
Open the guide - 2
Take this free issue
Uplift unvalidated logic to `ZeroMap`
Open issue #5660 - 3
Know where to ask
Questions go to the project's mailing list, or on the issue itself. Not in private messages.
Open it - 4
Sign the contributor agreement
A bot will ask you to sign a contributor licence agreement on your first pull request. It takes a minute.
- 5
Open a small pull request
Link the issue in it. A first reply here usually takes 2 h; until then, silence is normal.
What happens to an outside pull request
Every pull request opened by someone outside the core team, 30 to 120 days ago.
- Opened by outsiders36100%
- Got a human reply3494%
- Merged2364%
Time to first reply
After 2 days, 78% of outside PRs had a reply from a person. After a week, 81%. Bots do not count.
The last 52 weeks
Got faster. Median first reply was 4 h over the last four weeks (12 PRs) and 10 h over the four before (9 PRs).
Starter issues
Issues labelled for beginners, with their real state. Available means open, unassigned, no linked pull request, nobody has claimed it in the last 14 days, and it was updated in the last 60 days.
- Available
- 1
- Claimed
- 1
- Has a pull request
- 23
- Stale
- 15
- StaleTest for consistency between Solar Hijri and official Iranian rules#7669
- Has a pull requestHandle out-of-range values in Dense ZeroTrie#7303
- Has a pull requestFilter low-frequency suffixes from Dense ZeroTrie#7302
When replies arrive
All maintainers counted together. Shown only when at least 3 people replied in the last 90 days, so it never describes one person.
Replies are most likely between 20:00 and 23:00 (India time).
Show as table
| Hour (India time) | Replies, all weekdays |
|---|---|
| 00:00 | 47 |
| 01:00 | 45 |
| 02:00 | 59 |
| 03:00 | 50 |
| 04:00 | 34 |
| 05:00 | 21 |
| 06:00 | 9 |
| 07:00 | 8 |
| 08:00 | 5 |
| 09:00 | 4 |
| 10:00 | 7 |
| 11:00 | 12 |
| 12:00 | 21 |
| 13:00 | 38 |
| 14:00 | 60 |
| 15:00 | 54 |
| 16:00 | 44 |
| 17:00 | 45 |
| 18:00 | 43 |
| 19:00 | 55 |
| 20:00 | 67 |
| 21:00 | 81 |
| 22:00 | 63 |
| 23:00 | 45 |
How to start
- Contributing guidefound
- Code of conductnot found
- Issue templatesnot found
- Dev container for one-step setupfound
- A contributor licence agreement must be signed before a pull request is merged.
Where the project talks
Activity
- Commits, 90 days
- 224
- Releases, 12 months
- 5
- Active maintainers
- 10
- Last push
- 9 Oct 2026
Stack
Badge and feed
Two ways to use these figures outside this page.
For maintainers: a README badge
Shows newcomers how quickly this project answers and how often it merges. Paste the line into your README; the badge updates with the index.
[](https://contributable.vercel.app/repo/unicode-org/icu4x)[](https://contributable.vercel.app/repo/unicode-org/icu4x)For contributors: follow new issues
Add the feed to a feed reader (Feedly, Inoreader, Thunderbird) and you hear about new free starter issues here without checking the site.
https://contributable.vercel.app/feed/repo/unicode-org/icu4xFor developers: every figure on this page as JSON at /api/v1/repos/unicode-org/icu4x.
Similar repositories
Same main language (Rust), most shared frameworks and topics first, then the faster reply.
Boa is an embeddable Javascript engine written in Rust.
- First reply
- 4.9 days
