Open source Tableau alternatives

Show HN: Graphic-Walker – A different type of open-source alternative to Tableau

“It's a cool project, thanks for sharing. graphic-walker focuses more on a Grammar of Graphics based graphic system, not a chart-based system. But for performance in the browser, I am also researching ways to handle large datasets in the browser, such as duckdb-wasm. Another…”

Show HN: Graphic-Walker – A different type of open-source alternative to Tableau

“I checked rath some days ago, it is pretty cool. It's great to know graphic-walker. by the way, for RATH's automated data exploration, it seems like project.”

Apache Superset 1.1

“> Apache Superset is a Data Visualization and Data Exploration Platform Never heard of it before, but it looks very good and has a healthy community of large corporate users.”

Introduction to Apache Airflow

“Thread a few weeks back with Apache Airflow's cousin Apache Nifi [0] . A lot of great discussion in that thread, just like in this one. [0]”

Lessons learned from running Apache Airflow at scale

“Apache Airflow is tool for *analytical data* pipelines. If you want to create a daily/monthly data feed from your operational DB, move to it into Data warehouse, run jobs to process/aggregate that data and create daily/weekly/monthly reports, Airflow may help with all those.”

Streamlit: Turn a Python script into an interactive data analysis tool

“Cool! requests_cache caches HTML requests into one SQLite database. [1] pandas-datareader can cache external data requests with requests-cache. [2] dask.cache can do opportunistic caching (of 2GB of data). [3] How does streamlit compare to jupyter voila dashboards (with widgets…”

Streamlit: Turn a Python script into an interactive data analysis tool

“This is a declarative programming model similar to React. I'm surprised the analogy isn't drawn in the article. "Streamlit assigns each variable an up-to-date value given widget states." This line is interesting because it implies distributed state in each component (widget).…”

Polars

“I may be a rare bird starting with R dataframes (still newbie+ level), then python polars (intermediate- ?). Frankly whenever I have to use pandas or df's in R I am not convinced that these are more intuitive/easier to master. I.e. I do not like the concept of row names. Polars…”

Polars

“Dask is actually similar to spark in that it will let you compute outside of your computer over multiple machines. Matt Rocklin (the dask creator) has put some effort into benchmarking across all these recently. You can see the presentation here: If you don't feel like watching…”

Redash – Connect to any data source, easily visualize and share your data

“Hello! Redash is great if you are looking to host it in-house and have the engineering resources to set-up and maintain it. If you are looking for an affordable SaaS alternative, you may want to look into Holistics (www.holistics.io). (Note I'm the other co-founder here with…”

Redash – Connect to any data source, easily visualize and share your data

“Hey thanks for replying. We noticed a couple of UI irregularities (for example when editing charts the contents or axis labels would disappear). Unfortunately I don't have anything more specific for you right now. I did notice when deleting users it seems that they (and their…”

Polaroid Cube

“Hey - you're absolutely right about the video quality. Thanks for pointing it out. The cube looks like a great product, but I was wondering if it will be pro quality. Your post helps. GoPro actually does produce usable pro-quality HD video. Amazing for such a compact and simple…”

not a valid zip file

“not a valid zip file”

macOS can not use

“cell := xlsx.GetCellValue("Sheet1", "B2") fmt.Println(cell) // Get all the rows in a sheet. rows := xlsx.GetRows("sheet1") fmt.Println(rows) in windows it works normal,but in macOS rows is empty,cell can get value”

DataChain: DBT for Unstructured Data

“One of the maintainers of Daft here. Just dug through the datachain codebase to understand a little more. I think while both projects have a Dataframe interface , they're very different projects! Datachain seems to operate more on the orchestration layer, running Python…”

DataChain: DBT for Unstructured Data

“It took me a minute to grok what this was for, but I think I like it It doesn't really replace any of the tooling we use to wrangle data at scale (like prefect or dagster or temporal) but as a local library it seems to be excellent, I think what confused me most was the…”

Partytown: Run Third-Party Scripts from a Web Worker

“Checking the benchmark, Partytown resuts in 237ms, while Baseline is 7ms. Am I missing anything? The browser APIs are already mostly running on separate threads (JS parsing, compilation, TCP requests, etc.).”

Partytown: Run Third-Party Scripts from a Web Worker

“See this JS Party episode for a discussion by Partytown co-author (and Angular creator) at the 50:19 mark, . TL;DR, keep the main thread for your application, send 3rd party analytics, etc, to web workers.”

Ask HN: Experience with StarRocks?

“Not a user of StarRocks, but I'm curious about your experience with BigQuery and its price-to-performance (as well as its alternatives). I'm building a product with the gist of "BigQuery but cheaper" (~30%-50% expected cost reduction) by utilizing GPU acceleration (think Nvidia…”

Thoughts on OLAPs ClickHouse vs. Apache Druid vs. Starrocks in 2023/2024

“In fact, your choice is determined by your business scenario. I believe that overall, among these databases, StarRocks offers the highest flexibility. Particularly, if your business scenario relies on performing data analysis through joins across multiple tables, then StarRocks…”

A cryptography engineer's perspective on quantum computing timelines

“I was explicit about what the real argument isn't: the notion that lattice cryptography is under-studied compared to RSA/ECC. I understand what your takeaway from this thread is, but my perspective is that the thread is a mix of people who actually work in this field and people…”

Perspective Python install failure - Windows

“## Bug Report ### Steps to Reproduce: 1. `pip install numpy` 2. `pip install pyarrow==0.15.1` 3. `pip install perspective-python` ### Expected Result: I would expect the install to flag any additional required dependencies [y/n] and complete successfully. Full output below,…”

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

“> I was referring to your benchmark hitting exactly the functional scope of your library while it's invoking more generic libraries that by extension have to do more work for the same functional result ok that's fair but that overhead is immense, and you end up paying it…”

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

“> i dont think i ever said label measuring/collision detection is a performance hog. compared to the work of doing the plot itself, it's insignificant. avoiding that work is more of a code size and complexity reduction for uPlot, rather than a perf opt. Okay, fair enough > how…”

Oceanbase, yet another open source HTAP database

“I strong recommend the Database to every companies. OceanBase is a Distributed Database with more than 11 years history, There are more than 100 companies running with OceanBase. What's more, It is Alibaba behind OceanBase, OceanBase has been run with all kinds of user cases in…”

Oceanbase, yet another open source HTAP database

“OceanBase was open sourced but they deleted everything says it will no longer be open sourced. Now in 2021 they “open source” it again? TPCC result means nothing without context, Alibaba spent 54 million USD for hardware building the system to run the tests, in comparison 9…”

How to find the bidirectional map between Cognito identity ID and Cognito user information?

“Given the Cognito identity ID, I would like to programmatically find the user name, e-mail address, etc. For example, one issue is that each user gets his/her own folder in S3 (e.g. `private/${cognito-identity.amazonaws.com:sub}/` according to the…”

Flutter support

“is there any roadmap for flutter with amplify-js ?”

Fathom – Simple, trustworthy website analytics

“I was actually just looking into gauges and Fathom yesterday and tried to set it up. Fathom seemed a bit too early stage to run it myself so I'm going to wait a bit. I was pleasantly surprised that when I looked into gauges that the interface looks modern (unlike the screenshots…”

Fathom – Simple, trustworthy website analytics

“> (Hey Zuck, how was Congress?) Well if you use the stock price of $FB as a proxy, Congress was no problem. In fact Facebook stock is at all time record highs. At the height of the media hysteria it traded down to $152, in the last 4 months it has rocketed up 33%. This snark…”

Evidence-based advice we've found on how to be successful in a job

“I have a feeling people think that evidence is a binary thing. It's not. Evidence is a floating point value. That is, you can formulate some hypothesis, and the job of evidence is to move probability mass around. I.e. when you have hypotheses A, B and C, each piece of evidence…”

[Resolved] Crash in Analytics after sdk-exp response: -[__NSDictionaryM setObject:forKeyedSubscript:]: key cannot be nil

“### Description Since **2026-09-29 00:41 UTC**, our production iOS app has been crashing at a growing rate (56 crashes / 56 users in the first 18 minutes). We have not shipped an update. The crash started at the same time on 4 already-released builds. ``` Fatal Exception:…”

Xcode 12 GM Archive Error SPM - unexpected Mach-O header code: 0x72613c21

“### [REQUIRED] Step 1: Describe your environment * Xcode version: Xcode 12 GM (12A7208) * Firebase SDK version: 6.32-spm-beta * Firebase Component: Analytics * Component version: 6.32 * Installation method: Swift Package Manager ### [REQUIRED] Step 2: Describe the problem When…”

Test Claiming Issue

“Test Claiming Issue”

Add containment zones as they get declared

“**Is your feature request related to a problem? Please describe.** New containment clusters are being declared by the govt with different severity levels. It would be helpful to add them to this project **Describe the solution you'd like** A new page with the map color coded to…”