<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Hacker News: cjbillington</title><link>https://news.ycombinator.com/user?id=cjbillington</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Fri, 10 Apr 2026 12:55:53 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=cjbillington" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by cjbillington in "NIST ion clock sets new record for most accurate clock"]]></title><description><![CDATA[
<p>The lasers alone set you back many tens of k so it's not really possible to do on the cheap presently, even if a lot of the cost is expertise and the high overhead of R&D costs when only producing small number of units.<p>Oh and to know if it's any good you have to either build two (ideally more) of them to compare against each other (ideally using different approaches so their errors are less correlated), or have access to a clock better than the one you're building to compare to. So you can rarely get away with building just one if you want to know if you've succeeded.<p>Source: I work on the software for these portable optical clocks: <a href="https://phys.org/news/2025-07-quantum-clocks-accuracy-current-gps.html" rel="nofollow">https://phys.org/news/2025-07-quantum-clocks-accuracy-curren...</a></p>
]]></description><pubDate>Wed, 16 Jul 2025 01:46:28 +0000</pubDate><link>https://news.ycombinator.com/item?id=44577895</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=44577895</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44577895</guid></item><item><title><![CDATA[New comment by cjbillington in "Nano-engineered thermoelectrics enable scalable, compressor-free cooling"]]></title><description><![CDATA[
<p>The Carnot limit is the theoretical upper limit of the efficiency of a heat pump, so the stated number is presumably with respect to that, not heat moved per unit energy input like you're quoting.</p>
]]></description><pubDate>Thu, 03 Jul 2025 10:14:50 +0000</pubDate><link>https://news.ycombinator.com/item?id=44453462</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=44453462</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44453462</guid></item><item><title><![CDATA[New comment by cjbillington in "Private sector lost 33k jobs, badly missing expectations of 100k increase"]]></title><description><![CDATA[
<p>If it's true that more phones will allow people to be more productive, that increase in productivity should show up in GDP as well</p>
]]></description><pubDate>Thu, 03 Jul 2025 10:05:36 +0000</pubDate><link>https://news.ycombinator.com/item?id=44453419</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=44453419</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44453419</guid></item><item><title><![CDATA[New comment by cjbillington in "Melbourne man discovers extensive model train network underneath house"]]></title><description><![CDATA[
<p>I don't think there'll be any significant drop on a sub-decade timescale unless there's some kind of financial crisis, but the ideal kind of trend is prices stagnating or growing slower than wages, which is the case right now - and the question is whether it will continue.<p>I think there is a good chance it will, as long as a change of government doesn't deliberately dismantle the current approach. Yes there's population growth and yet prices have been stagnant or declining the past few years and construction has picked up. That's a good trend!<p>I'm not familiar with the situation with public housing but am happy to accept if the government has failed there. But this seems like a separate failure rather than an indictment of their approach to increasing supply generally which I think is working.</p>
]]></description><pubDate>Tue, 01 Jul 2025 23:05:56 +0000</pubDate><link>https://news.ycombinator.com/item?id=44438769</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=44438769</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44438769</guid></item><item><title><![CDATA[New comment by cjbillington in "Melbourne man discovers extensive model train network underneath house"]]></title><description><![CDATA[
<p>Melbourne property prices actually haven't recovered from their 2022 peak, and that's before adjusting for inflation. I believe rents are down in real terms as well.<p>Things have been crazy for a long time, but I am actually optimistic for Melbourne specifically - the construction rate is up and the state government has been decreasing the power local governments have to block or delay development. If this continues, housing affordability should improve. My main concern is that a change of government may put an end to it, but I hope not.<p>Some details about what VIC is doing differently in this AFR article if you're interested (archive link because original is paywalled):<p><a href="https://archive.md/yeDxF" rel="nofollow">https://archive.md/yeDxF</a></p>
]]></description><pubDate>Tue, 01 Jul 2025 09:06:42 +0000</pubDate><link>https://news.ycombinator.com/item?id=44432009</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=44432009</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44432009</guid></item><item><title><![CDATA[New comment by cjbillington in "Getting Past Procrastination"]]></title><description><![CDATA[
<p>They'll show up in the diff.<p>Grep will find them too, but any in the diff you'll know for sure were added by you.</p>
]]></description><pubDate>Sat, 07 Jun 2025 10:16:24 +0000</pubDate><link>https://news.ycombinator.com/item?id=44208667</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=44208667</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44208667</guid></item><item><title><![CDATA[New comment by cjbillington in "20 years of Git"]]></title><description><![CDATA[
<p>Huh, that's not my recollection.<p>Mercurial on windows was "download tortoisehg, use it", whereas git didn't have a good GUI and was full of footguns about line endings and case-insensitivity of branch names and the like.<p>Nowadays I use sublime merge on Windows and Linux alike and it's fine. Which solves the GUI issue, though the line ending issue is the same as it's always been (it's fine if you remember to just set it to "don't change line endings" globally but you have to remember to do that), and I'm not sure about case insensitivity of branch names.<p>Pretty sure Mercurial handles arbitrary filenames as UTF-8 encoded bytestrings, whether there was a problem with this in the past I can't recall, but would be very surprised if there was now.<p>Edit: does seem there at least used to be issues around this:<p><a href="https://stackoverflow.com/questions/7256708/mercurial-problem-with-non-ascii-letters-in-filenames-between-windows-and-linux" rel="nofollow">https://stackoverflow.com/questions/7256708/mercurial-proble...</a><p>though google does show at least some results for similar issues with git</p>
]]></description><pubDate>Tue, 08 Apr 2025 00:10:31 +0000</pubDate><link>https://news.ycombinator.com/item?id=43617186</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=43617186</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43617186</guid></item><item><title><![CDATA[New comment by cjbillington in "Show HN: Beating Pokemon Red with RL and <10M Parameters"]]></title><description><![CDATA[
<p>Based on the other examples of random inputs not being sufficient, I dare say the fish-based attempt may have been fraudulent.</p>
]]></description><pubDate>Thu, 06 Mar 2025 10:01:18 +0000</pubDate><link>https://news.ycombinator.com/item?id=43278359</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=43278359</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43278359</guid></item><item><title><![CDATA[New comment by cjbillington in "A FPGA friendly 32 bit RISC-V CPU implementation"]]></title><description><![CDATA[
<p>It took me to the end of your comment to realise the crucial bit I was missing: that they're talking about <i>implementing the CPU on an FPGA</i>.<p>As opposed to, say, <i>interfacing with an FPGA</i> which could be totally different way to be "FPGA-friendly".</p>
]]></description><pubDate>Sun, 26 Jan 2025 07:20:28 +0000</pubDate><link>https://news.ycombinator.com/item?id=42828391</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=42828391</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42828391</guid></item><item><title><![CDATA[New comment by cjbillington in "Starship Flight 7"]]></title><description><![CDATA[
<p>They had some Starlink simulators they were planning to deploy (to a suborbital trajectory, to re-enter along with the ship) this launch.</p>
]]></description><pubDate>Sat, 18 Jan 2025 01:39:42 +0000</pubDate><link>https://news.ycombinator.com/item?id=42745012</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=42745012</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42745012</guid></item><item><title><![CDATA[New comment by cjbillington in "Ask HN: A friend has brain cancer: any bio hacks that worked?"]]></title><description><![CDATA[
<p>As of his latest scan in November, 18 months post surgery, Scolyer's cancer hasn't recurred [1]. Average time to recurrence post-surgery is 6 months.<p>Don't want to leap to conclusions prematurely, but that might be some progress.<p>[1] <a href="https://x.com/ProfRAScolyer/status/1859179205885673877" rel="nofollow">https://x.com/ProfRAScolyer/status/1859179205885673877</a></p>
]]></description><pubDate>Fri, 10 Jan 2025 01:15:17 +0000</pubDate><link>https://news.ycombinator.com/item?id=42651521</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=42651521</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42651521</guid></item><item><title><![CDATA[New comment by cjbillington in "Trump wins presidency for second time"]]></title><description><![CDATA[
<p>If you're talking about "whalebait" markets on manifold, that's a bit disingenuous - these are markets where the thing you're betting about is related to trading behaviour itself, i.e. self-referential markets.<p>I don't disagree that the one french dude betting 30M on Trump on polymarket showed that there isn't enough liquidity in such markets for such distortions to be corrected, but whalebait on Manifold is not really related.</p>
]]></description><pubDate>Wed, 06 Nov 2024 21:37:05 +0000</pubDate><link>https://news.ycombinator.com/item?id=42069831</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=42069831</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42069831</guid></item><item><title><![CDATA[New comment by cjbillington in "Starship Flight 5: Launch and booster catch [video]"]]></title><description><![CDATA[
<p>They've actually been having to dump propellant in order to more accurately test what a Starship in orbit would be like, given they're not flying with a payload that would consume that propellant on ascent, but that they still want to launch with a full tank.<p>The dumping of this excess propellant actually caused an explosion and loss of vehicle on the second test flight.</p>
]]></description><pubDate>Mon, 14 Oct 2024 02:16:20 +0000</pubDate><link>https://news.ycombinator.com/item?id=41833603</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=41833603</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41833603</guid></item><item><title><![CDATA[New comment by cjbillington in "Starship Flight 5: Launch and booster catch [video]"]]></title><description><![CDATA[
<p>That is indeed what you get with tidal forces - bodies closer than geostationary orbit lose angular momentum and decay inward, bodies further out steal angular momentum from Earth and move outward.<p>I suppose the same effect is there with satellites much smaller than the moon, but it would be tiny.</p>
]]></description><pubDate>Mon, 14 Oct 2024 01:54:08 +0000</pubDate><link>https://news.ycombinator.com/item?id=41833479</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=41833479</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41833479</guid></item><item><title><![CDATA[New comment by cjbillington in "A high-performance, zero-overhead, extensible Python compiler using LLVM"]]></title><description><![CDATA[
<p>This might be what you meant, but the ordered dicts are faster, no? I believe ordering was initially an implementation detail that arose as part of performance optimisations, and only later declared officially part of the spec.</p>
]]></description><pubDate>Wed, 18 Sep 2024 22:44:43 +0000</pubDate><link>https://news.ycombinator.com/item?id=41586438</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=41586438</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41586438</guid></item><item><title><![CDATA[New comment by cjbillington in "Is my vision that bad? No, it's just a bug in Apple's Calculator"]]></title><description><![CDATA[
<p>Python for one, and given that, I'd assume most languages.</p>
]]></description><pubDate>Sun, 01 Sep 2024 00:48:48 +0000</pubDate><link>https://news.ycombinator.com/item?id=41413237</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=41413237</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41413237</guid></item><item><title><![CDATA[New comment by cjbillington in "Anthropic publishes the 'system prompts' that make Claude tick"]]></title><description><![CDATA[
<p>They believe it works because it does work!<p>"Chain of thought" prompting is a well-established method to get better output from LLMs.</p>
]]></description><pubDate>Tue, 27 Aug 2024 20:03:13 +0000</pubDate><link>https://news.ycombinator.com/item?id=41372325</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=41372325</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41372325</guid></item><item><title><![CDATA[New comment by cjbillington in "Anthropic publishes the 'system prompts' that make Claude tick"]]></title><description><![CDATA[
<p>What do they do instead? Given we're not talking to a base model.</p>
]]></description><pubDate>Tue, 27 Aug 2024 19:49:09 +0000</pubDate><link>https://news.ycombinator.com/item?id=41372149</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=41372149</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41372149</guid></item><item><title><![CDATA[New comment by cjbillington in "Workers are stuck in place because everyone is too afraid of a recession to quit"]]></title><description><![CDATA[
<p>FWIW, the fact that the recession market on Manifold doesn't resolve until the end of 2025 (to give the NBER time to declare a recession)  limits how low people will push the probability. I'm the biggest NO holder, and my credence is closer to 10%, but the rate of return isn't attractive enough to bet it lower. This is somewhat asymmetric, since bettors who expect a recession also expect an earlier payout.<p>I made this derivative market to try to address the issue somewhat, but not much trading yet:<p><a href="https://manifold.markets/chrisjbillington/will-manifold-price-a-2024-us-reces" rel="nofollow">https://manifold.markets/chrisjbillington/will-manifold-pric...</a></p>
]]></description><pubDate>Mon, 12 Aug 2024 23:18:00 +0000</pubDate><link>https://news.ycombinator.com/item?id=41230462</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=41230462</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41230462</guid></item><item><title><![CDATA[New comment by cjbillington in "The US fiscal mess: Some unpleasant fiscal simulations"]]></title><description><![CDATA[
<p>The Fed is expected to cut soon regardless, not to bail out the government but because inflation is falling. I imagine that will be the resolution to this. Perhaps rates won't go as low as you're suggesting, but they are expected to be decently lower than they are now.</p>
]]></description><pubDate>Sun, 28 Jul 2024 12:06:51 +0000</pubDate><link>https://news.ycombinator.com/item?id=41092695</link><dc:creator>cjbillington</dc:creator><comments>https://news.ycombinator.com/item?id=41092695</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=41092695</guid></item></channel></rss>