Hacker News: ww520

New comment by ww520 in "Owed a billion dollars in Nvidia stock"

ww520 — Mon, 28 Sep 2026 04:19:45 +0000

Yep, I bought Apple at $19 after Steve Jobs went back to Apple. Sold them at $80.

New comment by ww520 in "Google’s Project Suncatcher to put ML infrastructure in space"

ww520 — Thu, 24 Sep 2026 20:37:45 +0000

Don’t you get 4 faces to radiate away, assuming a long rectangular tube.

New comment by ww520 in "Show HN: Sigabrt.dev – cronjob monitor with an SSH TUI"

ww520 — Sun, 20 Sep 2026 15:54:16 +0000

People seem to miss the point of the project. It’s not emailing you on failure. It’s emailing on missing reports of scheduled runs. If you rely on the job to report failure, the machine could go down. In that case you won’t get any email on the failed run.

New comment by ww520 in "Astra for Law"

ww520 — Thu, 17 Sep 2026 22:37:02 +0000

The best writer I know of was an associate attorney. He didn't have the technical background nor the in depth computer related knowledge, and relying on the information I fed him. But man the briefs he filed to the court were amazingly good. Reading them I would have been convinced his side was right if I were in the jury.

Law LLM will surely help competent lawyers in their fields with greater sources of knowledge not in their core area of expertise.

New comment by ww520 in "Ask HN: Anyone still coding like 2021? Where do you work?"

ww520 — Wed, 09 Sep 2026 14:43:12 +0000

I still write code myself but I do use LLM. I use them for exploring ideas, explaining things, look up syntax, look up API/reference, look up algorithms, write tests, write duplicate code, write small functions that can be reviewed easily, do code reviews, find bugs, do performance review, do complexity analysis, etc.

The LLM generated code are correct about 80% of the time. Sometimes the generated code is overly complicated, has poor performance, missing a few assumptions, etc. that you need to review it carefully. It helps to have a solid and extensive set of tests.

New comment by ww520 in "Saving 100 terabytes of memory by optimizing 1.1.1.1's DNS cache"

ww520 — Fri, 28 Aug 2026 11:22:22 +0000

Unless the keys are completely random, compressed keys shorten the tree height and cause fewer pointer jumps. Hostnames are highly compressible. Plus the root and the upper levels of the tree are always hot, most likely in L1/L2/L3 all the times. OTOH collisions in hash table cause pointer chase as well.

New comment by ww520 in "Saving 100 terabytes of memory by optimizing 1.1.1.1's DNS cache"

ww520 — Fri, 28 Aug 2026 01:54:06 +0000

Not sure what they use to hold the cache key and entry. If a hashmap is used, then a radix tree (adaptive radix tree) would be better in saving memory space. Most of content of the qname field of the CacheKey is hostname, like www.site.com. The reverse version com.site.www fits nicely in navigation path of a radix tree. The common prefixes like "com." are shared and compressed in the parent nodes of the tree.

Even a BTree with compressed prefix keys can save space in the qname.

New comment by ww520 in "The Hugging Face incident and the road ahead"

ww520 — Wed, 26 Aug 2026 23:27:55 +0000

There’re good agents and there’re bad agents. It won’t be far that there will be agents hunting down agents.

New comment by ww520 in "Moderna reports first positive Phase 3 for mRNA neoantigen therapy in melanoma"

ww520 — Thu, 20 Aug 2026 01:17:10 +0000

mRNA is a general technique for targeted cancer therapy. It's the message RNA containing the instructions from a gene to create a specific protein. It's much easier to work with, reprogrammed, manufactured, and delivered. There're a number of approaches to use mRNA against cancer cells. One is using cancer related antigens, similar to the vaccine approach. mRNA is programmed to generate the antigen proteins in the body, which are attached to the cancer cells. The body's T-cells can then attack the tagged cancer cells.

The problem now is finding the correct antigens targeting the cancer cell type. Cancer cells are similar to health cells. You don't want to program a mRNA to generate antigen proteins that target health cells, which causes autoimmune problems.

New comment by ww520 in "Judge sets framework for Nine PBS to retrieve archival data"

ww520 — Mon, 17 Aug 2026 20:02:24 +0000

Whoever claims "your deposits are FDIC insured" needs to be prosecuted as fraud and scam artists. “Your” the company’s deposits in the bank is FDIC insured. My deposit with you the company is not. When the bank goes belly up, your deposit is FDIC secured up to the account limit which is tiny in the scale of things. When your company goes belly up, my deposit is gone.

New comment by ww520 in "AI isn’t outthinking mathematicians, it’s out-remembering them"

ww520 — Sat, 15 Aug 2026 23:34:24 +0000

Human can have periods of heightened mental capacity. Sometimes I looked back at some of my work days or weeks later and amazed how I could have done it. When you're in the flow, have enough sleep, and have long period of non-interrupted time, you can do amazing work.

New comment by ww520 in "Ask HN: What are you working on? (August 2026)"

ww520 — Sun, 09 Aug 2026 18:01:10 +0000

Succinct data structures. Finished the indexable bit vector, with nanosecond rank/select operations. Working on the range min max tree based balanced parentheses succinct tree structure, with support for the usual tree navigation and operations.

New comment by ww520 in "The AI trade now runs on borrowed money, and the lenders are repricing it"

ww520 — Fri, 31 Jul 2026 06:11:55 +0000

Speaking of AI stock, what has happened to NOK?

New comment by ww520 in "US citizen charged after GrapheneOS phone wipes during airport search"

ww520 — Mon, 27 Jul 2026 02:25:12 +0000

Charged is not convicted. Anyone can be charged with anything if the prosecution is vindictive.

New comment by ww520 in "US citizen charged after GrapheneOS phone wipes during airport search"

ww520 — Mon, 27 Jul 2026 02:22:33 +0000

As a speech.

New comment by ww520 in "Oracle could face $7B collateral bill for Wisconsin data centre"

ww520 — Tue, 21 Jul 2026 22:22:07 +0000

You missed the lawsuits by everyone else.

New comment by ww520 in "Oracle could face $7B collateral bill for Wisconsin data centre"

ww520 — Tue, 21 Jul 2026 22:21:22 +0000

You still need to build the power infrastructure to the rural areas. Build the infrastructure for the people, like roads, sewage, water, buildings, etc. Navigate the regulation and permit processes.

New comment by ww520 in "Oracle could face $7B collateral bill for Wisconsin data centre"

ww520 — Tue, 21 Jul 2026 16:50:13 +0000

Space DC make sense when local governments and communities don't want DC built on Earth. Space DC is an engineering and finance problem, not a problem in legal/permission, real estate, power generation, grid delivery, environmental, etc.

New comment by ww520 in "Faster binary search: from compiled code to mechanical sympathy"

ww520 — Fri, 17 Jul 2026 16:23:11 +0000

For small arrays that can fit in L1 cache, it's ok to do more loops. For bigger arrays, cache miss could remove all the gains.

New comment by ww520 in "My car’s OTA update broke Android Auto"

ww520 — Thu, 16 Jul 2026 23:02:10 +0000

When I bought my car, it had no Car Play or Android Auto. Upon some investigation I found out that both of them were installed on all the current models. It’s just disabled on the cars sold without the option. Some open source software for the car entertainment system flashed on the car was able to turn on the flags to enable various features including Car Play and Android Auto. So a happy story.