leeoniya

uPlot

JavaScript2019–2026

leeoniya / uPlot

uPlot

📈 A small, fast chart for time series, lines, areas, ohlc & bars

Data & Databases

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13Distinct people

38Mentions

0Explicit recommenders

10.6KGitHub stars

REPOSITORY AT A GLANCE

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

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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, 2:17:07 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

UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
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

7 sources

leeoniya·Nov 15, 2019

agreed. in working on uPlot, i've explicitly tried to stay away from misleading, hard to interpret, but pretty shit like line smoothing, stacked areas, etc. https://github.com/leeoniya/uPlot#non-features

In Why scientists need to be better at data visualization

1wheel·Oct 10, 2019

The column version looks like it has less detail along the top of the plot, but I think that's a rendering bug with the moveTo version: there aren't any data points above 1. I added code for gaps. The tight loop isn't disrupted that much; the number of interruptions is bounded by the x resolution. added a placeholder issue https://github.com/leeoniya/uPlot/issues/15

In Show HN: uPlot.js – An exceptionally fast, tiny time series chart

rejschaap·Oct 10, 2019

There is a list of alternatives in the performance benchmark you could check out: https://github.com/leeoniya/uPlot#performance Personally I use highcharts a lot, it has many chart types out of the box and allows for enough customization to fit my needs.

In Show HN: uPlot.js – An exceptionally fast, tiny time series chart

3dfan·Oct 10, 2019

Why is this needed in the codebase? export const getFullYear = 'getFullYear'; export const getMonth = 'getMonth'; export const getDate = 'getDate'; export const getDay = 'getDay'; export const getHours = 'getHours'; export const getMinutes = 'getMinutes'; export const getSeconds = 'getSeconds'; export const getMilliseconds = 'getMilliseconds'; To be seen here: https://github.com/leeoniya/uPlot/blob/master/src/fmtDate.js

In Show HN: uPlot.js – An exceptionally fast, tiny time series chart

leeoniya·Oct 10, 2019

i tested Flot [1] locally and got 351ms/45MB heap vs 45ms/20MB heap for uPlot on this machine. (the numbers in the readme are from another machine that's maybe 20% slower). i'll update the bench table tomorrow when i run it there. for Vega, i could use your help to add it to the list. learning exactly how its schemas work does not sound like a good time to me. [1] https://github.com/leeoniya/uPlot/blob/master/bench/Flot.htm...

In Show HN: uPlot.js – An exceptionally fast, tiny time series chart

leeoniya·Oct 9, 2019Submission

Show HN: uPlot.js – An exceptionally fast, tiny time series chart

260 points · Open discussion

leeoniya·Oct 6, 2019

i'm working on a micro timeseries plotter that easily handles 150k+ datapoints. it uses canvas but accounts properly for display pixel density, so is as sharp as SVG. here is how it performs vs Chart.js: https://github.com/leeoniya/uPlot#performance i will add Apex charts to the bench list in a day or so i think the only practical way to get acceptable perf with SVG is to simplify the paths via something like https://mourner.github.io/simplify-js/

In A Beginner’s Guide to Chart.js