LEleeoniya·Dec 28, 2020
> did i spell it right
almost ;)
https://github.com/leeoniya/uPlot
In Ask HN: What are the best charting / graphing JavaScript toolsleeoniya
uPlot
JavaScript2019–2026
leeoniya / uPlot
uPlot
📈 A small, fast chart for time series, lines, areas, ohlc & bars
13Distinct people
38Mentions
0Explicit recommenders
10.6KGitHub stars
What to know before exploring
What it is
📈 A small, fast chart for time series, lines, areas, ohlc & bars
GitHub
Where it is used
No documented product use was verified in the last source check.
What people are saying
No recommendation phrase was found in the indexed comments.
No classified warning is attached to this page. Read the discussions before treating silence as approval.
Also in these discussions
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This week on Hacker News
Nov 8–Nov 15 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/15/2026, 4:01:40 AM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year38 dated mentions
Observed mentions: 2019-10-06 16:56:26 UTC to 2026-04-09 23:32:50 UTC.
* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 7 | 1 | 6 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 13 | 1 | 12 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 5 | 0 | 5 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2025 | 2025-01-01 00:00:00 UTC | 2026-01-01 00:00:00 UTC | 1 | 1 | 0 |
| 2026 (partial) | 2026-01-01 00:00:00 UTC | 2027-01-01 00:00:00 UTC | 4 | 0 | 4 |
What Hacker News says
13 sourcesOne other common use for useRef that isn't mentioned here is to bridge your React component with a JS library outside the React ecosystem.
For example, if you wanted to instantiate a charting library like uPlot (https://github.com/leeoniya/uPlot) you might instantiate a uPlot object storing state and methods for the chart. You can perform the chart initialization in a useEffect hook, and use a ref to keep a reference to the instance you've created.
In React's UseRef Deep Divecool!
another neat project based on Dear ImGui that i follow is https://github.com/epezent/implot.
i'm a bit of a timeseries enthusiast. if you need something for the web, check out https://github.com/leeoniya/uPlot
EDIT: sorry, didn't mean to highjack the thread :(, all glory to /u/facontidavide!
In PlotJuggler 3: fast and intuitive time series visualizationwoops, that's a botched manual copy-pasta from the generated table here:
https://github.com/leeoniya/uPlot/blob/master/bench/table.md
i'll fix it soon.
In μPlot v1.1 – now with log scales supporti tagged v1.1 a bit ago, with lots of goodies and new demos.
main project page: https://github.com/leeoniya/uPlot
In μPlot v1.1 – now with log scales supporthey adam :)
it's highly dependent on what's actually drawn. i regressed it by accident and didnt notice a huge difference until i randomly opened the stress test (which is also densely packed so probably a worst case for AA)[1]. it went up by a factor of 2-4. cant remember exactly.
[1] https://github.com/leeoniya/uPlot/blob/master/bench/uPlot-60...
In Show HN: Plotting 3 years of hourly data in 150msthe bench code uses the boost module. so it's apples-to-apples:
https://github.com/leeoniya/uPlot/blob/master/bench/Highchar...
In Show HN: Plotting 3 years of hourly data in 150msi don't have dygraphs demo for this, but you can see where it lands on the 166k bench: https://github.com/leeoniya/uPlot#performance
In Show HN: Plotting 3 years of hourly data in 150msUnfortunately, I have to use Google Analytics and Google Ads at work every day, and these UIs have absolutely terrible performance :(
A small part of the problem is drawing the trend charts. So I decided to make uPlot [1] to see what was really possible.
[1] https://github.com/leeoniya/uPlot
In Show HN: Plotting 3 years of hourly data in 150msnot to hijack too much, but since this is on the topic of timeseries...i'm currently working on a fast* Canvas2D timeseries chart:
https://github.com/leeoniya/uPlot
* ~4,000 pts/ms on an i5 and integrated gpu
In Using SIMD to aggregate billions of values per secondprototyping scatter support for uPlot: https://github.com/leeoniya/uPlot
discussion: https://github.com/leeoniya/uPlot/issues/107
also helping mom set herself up for continuing to teach Russian remotely via Zoom video, audio, screen-share + bi-directional android tablet control (via ADB debugging & https://github.com/Genymobile/scrcpy)
In Ask HN: What projects are you working on now?Show HN: uPlot.js v1.0 – A fast, small chart for time series, OHLC and bars
Hello again!
5 months and ~400 commits since the initial prototype: https://news.ycombinator.com/item?id=21207132
v1.0 has shipped! - https://github.com/leeoniya/uPlot
A non-exaustive list of features/concerns that have been addressed since v0.1.0:
- A terse, consistent API, (w/ plugins & hooks)
- Timezone & DST handling
- Point rendering
- Bi-directional zooming
- Dynamic data updates (streaming)
- Numeric x scales (non-temporal)
- Area fills & high/low bands
- Dependent scales (°C -> °F)
- Cursor sync across charts
- Highlight closest series
- Axis labeling & positioning
- Bars & OHLC (via tiny plugins)
- Feature gates for even smaller custom builds
A bunch of demos: https://leeoniya.github.io/uPlot/demos/index.html
About a dozen brave early adopters helped me weed out bugs, add features, refine the API and co
Read the rest
ntributed demo code. Without them there'd be no v1.0, so thank you. So far there are some cool use-cases. One user renders several hundred hundred-point charts per page - something that's impossible with WebGL or heavier charting libs. There's been a prototype for Grafana panel integration. The author of Phaser [1] is currently taking uPlot for a perf-monitoring test drive while working on the new engine: https://github.com/phaserjs/phaser4-dev :D
Also, a shout out to the Chart.js guys, who recently tagged v3.0-alpha which performs 3x better than v2 on uPlot's benchmark, and is the only lib to have made any noticeable headway, let alone multiple factor!
cheers!
[1] https://github.com/photonstorm/phaser