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jhalstead

322 karma · joined September 26, 2012

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jhalstead··on Eight Bits of Trust: eMudhra's CA keys cracked in milliseconds
This question seems to be answered in another comment now: https://news.ycombinator.com/item?id=50180284
jhalstead··on FBI used iPhone notification data to retrieve deleted Signal messages
Fwiw, in my Signal app on Android this setting is in

Settings > Notifications > Messages > Show

jhalstead··on FBI used iPhone notification data to retrieve deleted Signal messages
On a Pixel, I can see some history by going to

Android > Settings > Notifications > Manage > Notification History

jhalstead··on Meta’s renewed commitment to jemalloc
> I’m surprised (unless they replaced the core tcmalloc algorithm but kept the name).

Indeed, it's not the old gperftools version.

Blog: https://abseil.io/blog/20200212-tcmalloc

History / Diffs: https://google.github.io/tcmalloc/gperftools.html

jhalstead··on Can an email go 500 miles in 2025?
Presumably this is the author given their UNC and SysAdmin background: https://www.linkedin.com/in/treyharris

I found it via a "trey harris sage.org" search on Google.

jhalstead··on Dead Stars Don’t Radiate
Direct link to A_D_E_P_T's comment: https://news.ycombinator.com/item?id=43964524
jhalstead··on Shortest-possible walking tour to 81,998 bars in South Korea
It seems like you're pretty close with that guess.

https://www.ibisworld.com/us/industry/ohio/bars-nightclubs/1... (2025) estimates there are about 3,000 "bars and nightclubs" in Ohio.

And https://vinepair.com/articles/map-states-with-most-bars/ (2022) estimates there are 1800 bars in Ohio, apparently placing it in the Top 10 of states with the most bars.

jhalstead··on Gemini Robotics brings AI into the physical world
What are you referring to with this part?

> they have blogged about their cutting-edge protobuf tsunami capabilities.

Not sure if you recall the blog post url or title, but I'm curious to read more.

jhalstead··on Seconds Since the Epoch
Their public NTP doc for the "leap smear" also includes some other leap smear proposals: https://developers.google.com/time/smear
jhalstead··on Facebook building subsea cable that will encompass the world
You can see some of the cables in https://cloud.google.com/about/locations#network
jhalstead··on IrfanView
Do you have a link for Ditto? Searching for "Ditto app" and "Ditto software" returns several possible results for me (e.g. clipboard, music app, managing "copy", content sharing).
jhalstead··on JPEG XL and the Pareto Front
[0] for those interested in Highway.

It's also mentioned in [1], which starts off

> Today we're sharing open source code that can sort arrays of numbers about ten times as fast as the C++ std::sort, and outperforms state of the art architecture-specific algorithms, while being portable across all modern CPU architectures. Below we discuss how we achieved this.

[0] https://github.com/google/highway

[1] https://opensource.googleblog.com/2022/06/Vectorized%20and%2..., which has an associated paper at https://arxiv.org/pdf/2205.05982.pdf.

jhalstead··on Chandrayaan-3 Soft-landing [video]
I'm not very familiar with this source [0], but it states "ESA was providing support to the Chandrayaan-3 mission from three of its ground stations located in Kourou (French Guiana), Goonhilly (United Kingdom), and New Norcia (Western Australia)." Although BIK doesn't obviously map to any of those.

[0] http://www.moneycontrol.com/news/india/chandrayaan-3-europea....

jhalstead··on CIQ, Oracle, SUSE Create Open Enterprise Linux Association
No issues when I opened it on mobile Chrome.
jhalstead··on FreeBSD spends 7% of its boot time running a bubblesort on its SYSINITs
Colin (and others?) have been working to reduce the boot time of FreeBSD for a while now. At this point shaving off a few milliseconds is probably a nice win for them.

https://twitter.com/cperciva/status/1659391725427720195?t=0y...

jhalstead··on All 1,400 Google Chrome CLI flags
Also, https://abseil.io/docs/cpp/guides/flags
jhalstead··on Waymo begins driverless rides in San Francisco
I believe OP is comparing the visualizations produced by the Auto Pilot system in their Tesla (jumpy) to Waymo's visualizations (stable and coherent).
jhalstead··on Multigenerational LRU: more performant, versatile, straightforward than Linux's
FWIW, the Use Cases section presents data about the impact in mobile and laptop environments:

On Android, our most advanced simulation that generates memory pressure from realistic user behavior shows 18% fewer low-memory kills, which in turn reduces cold starts by 16%.

...

On Chrome OS, our field telemetry reports 96% fewer low-memory tab discards and 59% fewer OOM kills from fully-utilized devices and no UX regressions from underutilized devices.

jhalstead··on C++ Anti-Patterns
If you're interested, check out Abseil's StrFormat [0] for a typesafe printf replacement that uses format strings. You get a nice speed up as well.

[0] https://abseil.io/docs/cpp/guides/format

jhalstead··on Ask HN: What are some channels that make you glad YouTube exists?
Clickspring: https://youtube.com/c/Clickspring

Crime Pays But Botany Doesn't: https://youtube.com/c/CrimePaysButBotanyDoesnt

Essential Craftsmen: https://youtube.com/c/essentialcraftsman

RR Buildings: https://youtube.com/c/RRBuildings

Sampson Boat Co.: https://youtube.com/c/SampsonBoatCo

Tips from a Shipwright: https://youtube.com/c/TipsfromaShipwrightvideos

jhalstead··on Blackrota: obfuscated backdoor written in Go
They have their website [0] in their profile, which has some interesting background.

[0] https://robertxiao.ca

jhalstead··on Scaling the Root of the DNS
As of the first graph in this August 2018 blog post [0], it seems like Google's Public DNS was handling about 14-18M QPS (1.2-1.6T per day).

[0] https://security.googleblog.com/2018/08/google-public-dns-tu...

jhalstead··on Facebook Gizmo
I hadn't heard of radishes before, but I found [0], which has more information about what they are/were. There's even a demo video with the creator.

[0] https://developers.google.com/gdata/articles/radish

jhalstead··on Introduction to Ada
Hmm, you may be in luck. That one looks like it's in the parent directory of the second link: http://www.bitsavers.org/pdf/dec/pdp10/TOPS10/1973_Assembly_...
jhalstead··on Introduction to Ada
Do you remember if the nickname was "Orange Book" or was it "phone book"? I didn't see the former when searching for more information, but the latter was referenced here [0].

If it's actually "phone book", then [1] seems promising.

[0] http://www.columbia.edu/cu/computinghistory/pdp10stuff/

[1] http://www.bitsavers.org/pdf/dec/pdp10/TOPS10/1972_PDP-10_Us...

jhalstead··on System Hardening in Android 11
re: Performance, my reply here [0] to a similar question might be of interest.

[0] https://news.ycombinator.com/item?id=23692806

jhalstead··on System Hardening in Android 11
I found this [0] 2019 blog post from what looks to be one of the people credited in the blog post (Kostya). It's not directly comparing Android+jemalloc vs Android+Scudo, but it does compare the two allocators and others.

[0] http://expertmiami.blogspot.com/2019/05/what-is-scudo-harden...

jhalstead··on About Musl
And for mobile readers ;)

# libc6-compat needed by outdated grpc-tools

# we get

# sh: node_modules/grpc-tools/bin/protoc: not found

# can be removed if we remove grpc-tools and assume an existing protoc for dev

# i.e. developers would independently intall protoc in order to generate

# grpc-web

# we install separate from the packages above to avoid a failure noticed on

# 2019-11-01

# apk update && apk add protobuf grpc gcompat libc6-compat

# ERROR: unsatisfiable constraints: # musl-1.1.20-r4:

# breaks: libc6-compat-1.1.24-r0[musl=1.1.24-r0]

# satisfies: musl-utils-1.1.20-r4[musl=1.1.20-r4]

#RUN apk add libc6-compat

jhalstead··on TCMalloc, Google's Customized Memory Allocator for C and C++, Now Open Source
For what it's worth, here's the blog post announcing this release: https://abseil.io/blog/20200212-tcmalloc.
jhalstead··on Google Fonts Analytics
raphlinus had this to say in response to a similar question: https://news.ycombinator.com/item?id=22370494
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