Hacker News: leeoniya

New comment by leeoniya in "Gnutella: A Protocol Outliving the World That Created It"

leeoniya — Mon, 25 May 2026 15:37:53 +0000

or was it Windows hiding file extensions by default and you downloaded a .mp3.exe file?

New comment by leeoniya in "PHP's Oddities"

leeoniya — Sat, 23 May 2026 18:50:47 +0000

surprised not to see http://phpsadness.com/ here

New comment by leeoniya in "Meta blocks human rights accounts from reaching audiences in Arabia and the UAE"

leeoniya — Wed, 20 May 2026 16:16:15 +0000

the term "Americans" always bothered me, though it's commonly used to refer to US

New comment by leeoniya in "I believe there are entire companies right now under AI psychosis"

leeoniya — Fri, 15 May 2026 21:13:24 +0000

> "no no, it has full test coverage"

i don't have enough fingers (and toes) to count how many times i've demonstrated that "100% coverage" is almost universally bullshit.

New comment by leeoniya in "Golden Testing a CAD Library"

leeoniya — Thu, 14 May 2026 07:07:10 +0000

if you want to do image diffing, use https://github.com/dmtrKovalenko/odiff

however, if you have SVGs already, compare those without rasterizing them first, then if that fails rasterize & odiff the baseline and new on-demand. this way you dont waste a ton of space storing a bunch of binary [possibly evolving] pngs in git.

New comment by leeoniya in "Fast and Easy Levenshtein distance using a Trie (2011)"

leeoniya — Thu, 16 Apr 2026 13:48:49 +0000

Levenshtein distance is often a poor way to fuzzy match or rank. i suspect that in js, even the trie approach would incur significant GC/alloc thrashing or cost of building a huge trie index.

i tried fuzzy matching using a cleverly-assembled regexp approach which works surprisingly well: https://github.com/leeoniya/uFuzzy

New comment by leeoniya in "EPA official in charge of methane regulations was an oil and gas lobbyist"

leeoniya — Sun, 05 Apr 2026 15:24:50 +0000

> Sen. Sheldon Whitehouse

ok, i was confused for a minute.

> And, given that the gas breaks down relatively quickly, this would have been one of the fastest ways to reduce global warming.

s/quickly/slowly?

New comment by leeoniya in "Claude Code's source code has been leaked via a map file in their NPM registry"

leeoniya — Tue, 31 Mar 2026 18:30:56 +0000

> for a 2–3% performance gain

this is highly workload-dependent. there are plenty of APIs that are multiple-factor faster and 10x more memory efficient due to native implementation.

New comment by leeoniya in "Pretext: TypeScript library for multiline text measurement and layout"

leeoniya — Mon, 30 Mar 2026 09:32:02 +0000

ack, see my reply to sibling comment: https://news.ycombinator.com/item?id=47572206

New comment by leeoniya in "Pretext: TypeScript library for multiline text measurement and layout"

leeoniya — Mon, 30 Mar 2026 09:27:00 +0000

no disagreement. i never claimed uWrap did anything more than it does. it was not meant for typography/text-layout but for line count estimation. it never needed to be perfect, and i did not claim equivalence to pretext. however, for the use case of virtualization of data tables -- a use case pretext is also targeted at -- and in the common case of latin alphabets, right now pretext is significantly slower. i hope that it can become faster despite its much more thorough support for "rest of the owl".

New comment by leeoniya in "Pretext: TypeScript library for multiline text measurement and layout"

leeoniya — Mon, 30 Mar 2026 09:17:52 +0000

i don't have a mac to test this with currently, so hopefully it's not the price but a matter of adding a Safari-specific adjustement :)

internally it still uses the Canvas measureText() API, so there's nothing fundamentally that should differ unless Safari has broken measureText, which tbh, would not be out of character for that browser.

New comment by leeoniya in "Pretext: TypeScript library for multiline text measurement and layout"

leeoniya — Mon, 30 Mar 2026 02:59:48 +0000

tried just doing a concat of the 100k sentences with line breaks, it wasnt much faster, ~1880ms.

New comment by leeoniya in "Pretext: TypeScript library for multiline text measurement and layout"

leeoniya — Mon, 30 Mar 2026 00:41:16 +0000

it is not clear from the API/docs how i would use prepare() once on one text and then use layout() for completely different text.

i think the intended purpose is that your text is maybe large but static and your layout just changes quickly. this is not the case for figuring out the height of 100k rows of different texts in a table, for example.

New comment by leeoniya in "Pretext: TypeScript library for multiline text measurement and layout"

leeoniya — Mon, 30 Mar 2026 00:39:10 +0000

correct, it was meant for estimating row height for virtualizing a 100k row table with a latin-ish LTR charset (no emoji handling, etc). its scope is much narrower. still, the difference in perf is significant, which i have found to be true in general of AI-generated geenfield code.

New comment by leeoniya in "Pretext: TypeScript library for multiline text measurement and layout"

leeoniya — Mon, 30 Mar 2026 00:10:50 +0000

i wrote something similar for this purpose, but much simpler and in 2kb, without AI, about a year ago.

uWrap.js: https://news.ycombinator.com/item?id=43583478. it did not reach 11k stars overnight, tho :D

for ASCII text, mine finishes in 80ms, while pretext takes 2200ms. i haven't yet checked pretext for accuracy (how closely it matches the browser), but will test tonight - i expect it will do well.

let's see how close pretext can get to 80ms (or better) without adopting the same tricks.

https://github.com/chenglou/pretext/issues/18

there are already significant perf improvement PRs open right now, including one done using autoresearch.

New comment by leeoniya in "Full Disclosure: A Third (and Fourth) Azure Sign-In Log Bypass Found"

leeoniya — Fri, 20 Mar 2026 15:28:03 +0000

just throw another few on the pile:

https://mastodon.social/@azureshit

New comment by leeoniya in "Why is the sky blue?"

leeoniya — Mon, 09 Feb 2026 20:56:29 +0000

the good ones would usually follow up with, "how much detail do you _really_ want ;D"

New comment by leeoniya in "Why is the sky blue?"

leeoniya — Mon, 09 Feb 2026 19:15:20 +0000

i used something like this in unstructured technical interviews all the time.

"you type a phrase into google search, you press enter, get some results. tell me, in technical detail, what happened in that chain of actions"

the diversity of replies is fascinating, you learn a lot about a "full stack" candidate this way.

Feynman's classic "Why?" chain: https://www.youtube.com/watch?v=36GT2zI8lVA

New comment by leeoniya in "Show HN: ChartGPU – WebGPU-powered charting library (1M points at 60fps)"

leeoniya — Thu, 22 Jan 2026 01:24:37 +0000

hey!

> But regarding sampling, if it's a line chart, you can sample adaptively by checking whether the next point makes a meaningfully visible difference measured in pixels compared to its neighbours.

uPlot basically does this (see sibling comment), so hopefully that's some validation for you :)

New comment by leeoniya in "Show HN: ChartGPU – WebGPU-powered charting library (1M points at 60fps)"

leeoniya — Thu, 22 Jan 2026 01:22:34 +0000

> In Ardour (a cross-platform, libre, open source DAW), we actually compute and store min/max-per-N-samples and use that for plotting (and as the basis for further downsampling.

this is, effectively, what uPlot does, too: https://github.com/leeoniya/uPlot/issues/1119