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hglaser

2,578 karma · joined October 28, 2009

cofounder of kitewing // www.kitewing.ai

previously cofounder of periscope data

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hglaser··on Claude Opus 5.5 Intelligence, Performance and Price Analysis (Max)
Half the cost per task compared to Opus 5, comparing high effort to high effort. That's just really nice.

Edit: https://artificialanalysis.ai/models/claude-opus-5-5?models=...

hglaser··on Gemini 3.8 Flash and 3.8 Flash Cyber
I saw your username, clicked the link without reading, and was very confused to see a cosmic vortex and not a pelican.
hglaser··on The Voice of Google
Agreed. From firsthand experience, it's accurate, captures the feeling of being there at that time, and is more restrained than I would have been.
hglaser··on Pulitzer Prize Winners 2026
Once again, a moment of gratitude for the San Francisco Chronicle. In a time when local news is mostly gutted, I'm grateful to live in the rare mid-size city that has a robust local paper. Real investigative reporting, a serious local political beat, and features that win Pulitzer prizes. Plus a great sports section and restaurant critics!
hglaser··on Where things stand with the Department of War
It is incredible how far the overton window has moved on this issue.

When I graduated in 2007, it was common for tech companies to refuse to let their systems be used for war, and it was an ordinary thing when some of my graduating classmates refused to work at companies that did let their systems be used for war. Those refusals were on moral grounds.

Now Anthropic wants to have two narrow exceptions, on pragmatic and not moral grounds. To do so, they have to couch it in language clarifying that they would love to support war, actually, except for these two narrow exceptions. And their careful word choice suggests that they are either navigating or expect to navigate significant blowback for asking for two narrow exceptions.

My, the world has changed.

hglaser··on A chatbot's worst enemy is page refresh
Yep. We had to do a surprising amount of work to solve this in our product: https://www.kitewing.ai/blog/stateless-agents-stateful-produ...

Very weird that the foundational LLM companies' own chat pages don't do this.

hglaser··on Netflix to Acquire Warner Bros
It was indeed originally conceived as 5 seasons, but the creator Tony Gilroy has consistently said shortening it was his decision because the production was too long and taxing:

"We were halfway through shooting season 1, coming through Covid, and the monumental size of the show, the effort, and everything else was just dawning on us. We realized that I didn't have enough calories to do it, and Diego's face couldn't take the timing, because it just takes too long to make it."

https://www.gamesradar.com/entertainment/star-wars-tv-shows/...

"By that point, the work that was required to make the show, at its minimum, was just dazzlingly blinding to look at. And Diego was like ‘Oh my god, we told them we’d do five years.’ Nobody, if we were gonna do it like this, you couldn’t physically do it. It was just impossible."

https://screenrant.com/andor-tony-gilroy-original-five-seaso...

hglaser··on Uv is the best thing to happen to the Python ecosystem in a decade
Am I the only one who feels like this is obviated by Docker?

uv is a clear improvement over pip and venv, for sure.

But I do everything in dev containers these days. Very few things get to install on my laptop itself outside a container. I've gotten so used to this that tools that uninstall/install packages on my box on the fly give me the heebie-jeebies.

hglaser··on Show HN: Tableau-Like Data Visualizations in JavaScript
Always happy to talk! harry at periscopedata.com
hglaser··on Show HN: Tableau-Like Data Visualizations in JavaScript
Appreciate the feedback!

Yeah, the hack you described for CIs is typical of "80% charting". We have a list of probably thousands of longtail visualization requests and we're way past the 80/20 point.

These days customers who want to go 100% use the Python/R editors and do their custom visualization there. So you do your SQL query like usual, but then pipe it to Python/R for the visualization. Have you tried that, and has it worked for you? Or do you prefer another model?

hglaser··on Show HN: Tableau-Like Data Visualizations in JavaScript
Hey `cpsempek, Periscope Data CEO here.

In a perfect world, how would the charting in Periscope work? How would you want to go from getting 80% very fast, to going to 100%, in the same software?

hglaser··on Reddit Co-Founder Alexis Ohanian Steps Aside, Focuses on Initialized Capital
It's likely that the largest advertisers don't use the self-serve ad manager. They call their rep who operates the system for them. This is why the self-serve ad managers for AdWords, Facebook Ads, etc. are all pretty unloved.
hglaser··on Outlier Detection in SQL
Thanks! Fixed.
hglaser··on Outlier Detection in SQL
Sorry about that! Just sent you an email.
hglaser··on Outlier Detection in SQL
Periscope Data cofounder here. I wouldn't say we're "allergic" necessarily. ;) Like a lot of startups, we're very young and haven't gotten around to building out the website as much as we'd like to.

`jplitz and `ajones are right. As of now we support MySQL, Postgres, Amazon Redshift, Vertica, SQL Server, Oracle, MemSQL, Sybase, Exasol and Google BigQuery. We add more all the time.

hglaser··on Show HN: Metabase, an open-source business intelligence tool
(Full disclosure, co-founder of Periscope Data here.)

Periscope Data supports cross-DB joins. We cache the data in our own clusters so queries run really fast, and also so you can do things like join across databases and upload CSVs.

More info: http://www.periscopedata.com. I'm harry at periscopedata.com

hglaser··on Ask HN: What data visualisation tools do data scientists and developers use?
Thanks for the kind words!

For ping-and-visualize, I'd recommend a tool that'll give you raw access to the underlying data. Some choices are https://amplitude.com/ and https://segment.com/. Happy to chat about pros and cons if you're curious -- harry@periscope.io.

hglaser··on Ask HN: What data visualisation tools do data scientists and developers use?
I'll just say upfront that I'm the cofounder of Periscope (https://www.periscope.io/) which is specifically marketed at data scientists, so I have a horse in this race. :)

There are two kinds of charts: Charts designed to find information, and charts designed to sell information. The latter are often gorgeous and many-dimensional: Heatmaps, animated bubble charts, charts with time sliders, etc. And by all means, if selling the data is required, then sell it with the best tool for the job.

As for actually investigating the data, it's usually a lot of tables, lines and bars. They're simple to understand, and there's no cleverness in the visualization that might hide critical information.

To answer your questions, at Periscope I've seen:

1. A line graph of amplitude over time. You should see the frequency emerge clear as day. If you want to calculate frequency explicitly, you could overlay a second line with its own axis. Again, super simple, but gives you the answer directly.

2. I've seen a lot of fancy graph visualizations, but nothing that makes me happy. Depending on what you want to know about your graph, maybe a simple table with a structure like:

  [node name][node name][weight]
Or:

  [timestamp][node name][node name][weight]
A pivot table on top of this data, transoforming the second node column into the table's horizontal axis, can also be useful.

3. OK, obviously I think Periscope is a great choice here. Loads of data analysts use it to visualize time series data on many tens/hundreds of billions of data points.

That said, other good choices are: Excel, R/Stata/Matlab, gnuplot, Apache Pig. And for the data storage itself, IMO Amazon Redshift is unparalleled.

hglaser··on Building Analytics at 500px
yep
hglaser··on Building Analytics at 500px
(Periscope co-founder here.)

There needs to be a route from the internet to your DB, yes. Sometimes this works because the DB is in the cloud, or sometimes a port or SSH tunnel is opened into a local network.

hglaser··on How to Build a Unicorn and Walk Away with Nothing
Unpaid wages are one of the few ways to pierce the corporate veil. In the US, officers of the corporation can be personally liable for unpaid wages.
hglaser··on Show HN: The Lazy Analyst's Guide to Faster SQL
Periscope co-founder here.

We plan to treat the email addresses as people who might be interested in our product, and at some point we'll reach out to everyone who signed up and ask if they'd like to try it out.

If you know you don't want to try Periscope, but would like to read the eBook, by all means use the link above. ;)

hglaser··on Ask HN: What startups are working on hard, technically challenging problems?
Periscope (https://www.periscope.io/) is a data visualization tool that automatically and transparently syncs customer data into a huge multitenant data cache that runs queries ~ 150X faster than customers' own databases.

In the long run, it is a data tool that will eliminate the need for data warehouses.

It turns out the hard problem is not running the queries fast, but keeping the cache accurate and up-to-date. Our cache coherence service is probably the piece of code we're most proud of.

And, yes, we're hiring in SF. :) Reach out to me, harry@periscope.io

hglaser··on Searching 20 GB/sec: Systems Engineering Before Algorithms (2014)
Great post.

BTW, this product (Scalyr) is a lifesaver. We (Periscope) are able to operate ~ a dozen heterogeneous servers with no FT DevOps largely because of Scalyr.

hglaser··on Building Out the SeatGeek Data Pipeline
Periscope co-founder here. We have plans as low as $350/mo. for startups with small datasets. I'm harry at periscope.io if that sounds appealing.
hglaser··on Some Thoughts on Founder Liquidity
I have heard of loans either secured by or "based on" shares of privately-held startups. I have no idea how common this is -- probably pretty uncommon.

See e.g. https://www.svb.com/private-bank/founder-liquidity/ and http://www.founderscircle.com/services/

hglaser··on Systematizing Sales with Software and Processes
I get so much love from customers when I email them a few days ahead of the renewal and let them know that they're over quota, that I didn't want them to be surprised by the CC bill, and give them an opportunity to pare back down if they want to.

This is one of those areas where "being a good person" is a competitive advantage and drives lots of retention. Plus, after a couple months of this, they'll all upgrade anyway as paring down gets harder and more time-consuming.

hglaser··on NASA’s $349M monument to its drift
Wow, this is a great comment! Thanks for writing.
hglaser··on The Fatal Pinch
Spend less than you make.
hglaser··on DNSimple DDOS Attack
That page doesn't load for me. :)

We went by this:

https://twitter.com/dnsimple/status/539521794802483202

https://twitter.com/dnsimple/status/539520808599957505

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