<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: achatham</title><link>https://news.ycombinator.com/user?id=achatham</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Wed, 08 Jul 2026 01:50:16 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=achatham" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by achatham in "Claude-real-video － any LLM can watch a video"]]></title><description><![CDATA[
<p>Yes, Gemini is very token efficient at video. It also has "lower resolution" options which can make it even cheaper if. With Gemini 3.1 flash lite an hour of video works out to $0.24 at the API rates.</p>
]]></description><pubDate>Fri, 03 Jul 2026 04:30:03 +0000</pubDate><link>https://news.ycombinator.com/item?id=48770721</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=48770721</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48770721</guid></item><item><title><![CDATA[New comment by achatham in "Uber, Lyft drivers in Massachusetts form first US ride-share union"]]></title><description><![CDATA[
<p>What conclusion do you think I was drawing? I was just sharing an interesting quote relevant to the thread.<p>Oil was solely a lighting product at this point. The Teamsters were clearly not thinking 70 years into the future to stop automobiles. But I think the "monopoly" part of the quote is somewhat germain, even if it's just opinion of the author.</p>
]]></description><pubDate>Tue, 26 May 2026 20:58:33 +0000</pubDate><link>https://news.ycombinator.com/item?id=48285874</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=48285874</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48285874</guid></item><item><title><![CDATA[New comment by achatham in "Uber, Lyft drivers in Massachusetts form first US ride-share union"]]></title><description><![CDATA[
<p>No idea about them trying to ban automobiles, but oil pipelines were invented to get around their friction. From _The Prize_, referencing the mid-1800s:<p>"From the first discoveries, teamsters, lashing their horses, had clogged the roads of the Oil Regions with their loads of barrels. They were more than just a physical bottleneck. Holding a monopoly position, they charged exorbitant rates; it cost more to move a barrel over a few miles of muddy road to a railway stop than to transport it by rail from western Pennsylvania all the way to New York. The teamsters’ stranglehold on transportation led to an ingenious effort to develop an alternative—transportation by pipeline."</p>
]]></description><pubDate>Tue, 26 May 2026 19:31:09 +0000</pubDate><link>https://news.ycombinator.com/item?id=48284798</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=48284798</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48284798</guid></item><item><title><![CDATA[New comment by achatham in "Elon Musk has lost his lawsuit against Sam Altman and OpenAI"]]></title><description><![CDATA[
<p>The donation was also made through a donor advised fund (DAF), which means Musk didn't legally make the donation. I'm surprised he didn't lose on not having standing.</p>
]]></description><pubDate>Mon, 18 May 2026 20:03:36 +0000</pubDate><link>https://news.ycombinator.com/item?id=48184803</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=48184803</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=48184803</guid></item><item><title><![CDATA[New comment by achatham in "Waymo Safety Impact"]]></title><description><![CDATA[
<p>We do support YouTube Music and actually supported that before Spotify. But we only do ad-supported on Spotify and iHeartRadio (also paid Spotify).</p>
]]></description><pubDate>Fri, 20 Mar 2026 03:23:28 +0000</pubDate><link>https://news.ycombinator.com/item?id=47450103</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=47450103</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47450103</guid></item><item><title><![CDATA[New comment by achatham in "Ask HN: What Are You Working On? (March 2026)"]]></title><description><![CDATA[
<p>Making my own epub reader with the kitchen sink of features I'd like. It's a speed-reading app first and foremost, using RSVP (rapid serial visual presentation, one word at a time). Also answers questions about the book with an LLM without spoilers, and can create illustrations. I've been reading _Mercy of the Gods_ lately, which has vivid descriptions of a bunch of alien races, but the pictures have done a great job supplementing my imagination. I've read more books in the past month than the last year, but we'll see if I keep it up.<p><a href="https://github.com/achatham/epub_speedread" rel="nofollow">https://github.com/achatham/epub_speedread</a></p>
]]></description><pubDate>Mon, 09 Mar 2026 01:37:29 +0000</pubDate><link>https://news.ycombinator.com/item?id=47303818</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=47303818</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=47303818</guid></item><item><title><![CDATA[New comment by achatham in "Nano Banana can be prompt engineered for nuanced AI image generation"]]></title><description><![CDATA[
<p>My personal project is illustrating arbitrary stories with consistent characters and settings. I've rewritten it at least 5 times, and Nano Banana has been a game-changer. My kids are willing to listen to much more sophisticated stories as long as it has pictures, so I've used it to illustrate text like Ender's Game. Unfortunately, it's getting harder to legally acquire books in a format you can feed to an LLM.<p>I first extract all the entities from the text, generate characters from an art style, and then start stitching them together into individual illustrations. It works <i>much</i> better with NB than anything else I tried before.</p>
]]></description><pubDate>Fri, 14 Nov 2025 02:09:33 +0000</pubDate><link>https://news.ycombinator.com/item?id=45923071</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=45923071</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45923071</guid></item><item><title><![CDATA[New comment by achatham in "C++20 Modules: Practical Insights, Status and TODOs"]]></title><description><![CDATA[
<p>This was in place of reorganizing the codebase, which would have been the alternative. I've done such work in the past, and I've found it's a pretty rare skillet to optimize compilation speed. There's just a lot less input for the compiler to look at, as the useless transitive text is dropped.<p>And to be clear, it also speeds up the original compilation, but that's not as noticeable because when you're compiling zillions of separate compilation units with massive parallelism, you don't notice how long any given file takes to compile.</p>
]]></description><pubDate>Thu, 11 Sep 2025 17:05:53 +0000</pubDate><link>https://news.ycombinator.com/item?id=45213820</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=45213820</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45213820</guid></item><item><title><![CDATA[New comment by achatham in "C++20 Modules: Practical Insights, Status and TODOs"]]></title><description><![CDATA[
<p>Clang modules. Sorry, didn't realize the distinction!</p>
]]></description><pubDate>Thu, 11 Sep 2025 15:13:02 +0000</pubDate><link>https://news.ycombinator.com/item?id=45212600</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=45212600</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45212600</guid></item><item><title><![CDATA[New comment by achatham in "C++20 Modules: Practical Insights, Status and TODOs"]]></title><description><![CDATA[
<p>We use c++ modules at Waymo, inside the google monorepo. The Google toolchain team did all the hard work, but we applied it more aggressively than any team I know of. The results have been fantastic, with our largest compilation units getting a 30-40% speedup. It doesn't make a huge difference in a clean build, as that's massively distributed. But it makes an enormous difference for iterative compilation. It also has the benefit of avoiding recompilation entirely in some cases.<p>Every once in a while something breaks, usually around exotic use of templates. But on the whole we love it, and we'd have to do so much ongoing refactoring to keep things workable without them.<p>Update: I now recall those numbers are from a partial experiment, and the full deployment was even faster, but I can't recall the exact number. Maybe a 2/3 speedup?</p>
]]></description><pubDate>Thu, 11 Sep 2025 14:49:36 +0000</pubDate><link>https://news.ycombinator.com/item?id=45212347</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=45212347</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45212347</guid></item><item><title><![CDATA[New comment by achatham in "What to do with C++ modules?"]]></title><description><![CDATA[
<p>At Waymo we use c++ modules via clang and got the demanded 5x speedup.<p>As the article mentions, you need a close relationship between the compiler and build system, which Google already has. The google build tooling team got modules to mostly work but only turned them on in limited situations. But we but the bullet and turned them on everywhere, which has sped up compilation of individual files by more than 5x (I forget the exact number).<p>The remaining problem is that sometimes we get weird compilation errors and have to disable modules for that compilation unit. It's always around templates, and Eigen has been gnarly to get working.</p>
]]></description><pubDate>Wed, 03 Sep 2025 08:32:40 +0000</pubDate><link>https://news.ycombinator.com/item?id=45113489</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=45113489</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45113489</guid></item><item><title><![CDATA[New comment by achatham in "Zuckerberg’s AI hires disrupt Meta with swift exits and threats to leave"]]></title><description><![CDATA[
<p>> “While TBD Labs is still relatively new, we believe it has the greatest compute-per-researcher in the industry, and that will only increase,” Meta said.<p>Well, two ways to make that true!</p>
]]></description><pubDate>Sun, 31 Aug 2025 18:26:04 +0000</pubDate><link>https://news.ycombinator.com/item?id=45085599</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=45085599</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=45085599</guid></item><item><title><![CDATA[New comment by achatham in "Ex-Waymo engineers launch Bedrock Robotics to automate construction"]]></title><description><![CDATA[
<p>And imagine a hypothetical project that's 75% excavation. It'd never be built today, but if excavation gets cheaper the project could be feasible.<p>And then an explosion of underground bunkers and volcano lairs.</p>
]]></description><pubDate>Thu, 17 Jul 2025 04:04:22 +0000</pubDate><link>https://news.ycombinator.com/item?id=44589606</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=44589606</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44589606</guid></item><item><title><![CDATA[New comment by achatham in "Waymo rides cost more than Uber or Lyft and people are paying anyway"]]></title><description><![CDATA[
<p>As a counter to your one example:<p>I've worked on autonomous vehicles for 16 years and my largest philanthropic effort is improving public transit. The common theme is being really interested in transportation and wanting it to work well for people.<p>Cruise was also the top funder of one San Francisco's recent MUNI funding ballot propositions (which just barely failed). You can certainly have a cynical take on that, but they still did it.</p>
]]></description><pubDate>Sun, 15 Jun 2025 14:57:34 +0000</pubDate><link>https://news.ycombinator.com/item?id=44282614</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=44282614</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=44282614</guid></item><item><title><![CDATA[New comment by achatham in "New Study: Waymo is reducing serious crashes and making streets safer"]]></title><description><![CDATA[
<p>The paper under discussion only considers human accidents in similar environments to where Waymo operates. So it's only making a claim about like-for-like driving.<p>You could still say you care about snow driving and want to see that comparison, but it doesn't mean the claims in this paper are wrong.</p>
]]></description><pubDate>Thu, 01 May 2025 20:30:47 +0000</pubDate><link>https://news.ycombinator.com/item?id=43863010</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=43863010</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43863010</guid></item><item><title><![CDATA[New comment by achatham in "Waymo and Toyota outline partnership to advance autonomous driving deployment"]]></title><description><![CDATA[
<p>What you're describing is L4. L4 is fully autonomous but with limitations on where/when it can operate. Level 5 is that but without restrictions.<p>Level 2 and 3 are the mostly-automated version, and they differ in how much notice they're supposed to provide and how much attention they require.</p>
]]></description><pubDate>Tue, 29 Apr 2025 23:54:50 +0000</pubDate><link>https://news.ycombinator.com/item?id=43839502</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=43839502</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43839502</guid></item><item><title><![CDATA[New comment by achatham in "Waymo and Toyota outline partnership to advance autonomous driving deployment"]]></title><description><![CDATA[
<p>I think you may mean Level 4. The difference between 4 and 5 is that 5 doesn't have any territory/environmental constraints, but you said you don't mind those.</p>
]]></description><pubDate>Tue, 29 Apr 2025 23:52:15 +0000</pubDate><link>https://news.ycombinator.com/item?id=43839480</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=43839480</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43839480</guid></item><item><title><![CDATA[New comment by achatham in "Tesla sales in Europe down 45% in January"]]></title><description><![CDATA[
<p>Your link literally says the opposite. Sales dropped from 2023 to 2024.</p>
]]></description><pubDate>Fri, 28 Feb 2025 16:07:00 +0000</pubDate><link>https://news.ycombinator.com/item?id=43207183</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=43207183</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=43207183</guid></item><item><title><![CDATA[New comment by achatham in "A comparison to Waymo’s auto liability insurance claims at 25M miles"]]></title><description><![CDATA[
<p>But the Bakersfield/Merced HSR line is an actual project, estimated at over $30B (it makes no sense independently but is part of LA-to-SF).<p>You seem to be comparing an actual, private tech project to what you wished public transit looked like, not what it actually looks like.<p>Public transit is awesome, but construction costs in the anglophone world are bananas (<a href="https://transitcosts.com/" rel="nofollow">https://transitcosts.com/</a>).</p>
]]></description><pubDate>Fri, 20 Dec 2024 19:06:29 +0000</pubDate><link>https://news.ycombinator.com/item?id=42473860</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=42473860</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42473860</guid></item><item><title><![CDATA[New comment by achatham in "A comparison to Waymo’s auto liability insurance claims at 25M miles"]]></title><description><![CDATA[
<p>We started January 2009.</p>
]]></description><pubDate>Fri, 20 Dec 2024 15:41:10 +0000</pubDate><link>https://news.ycombinator.com/item?id=42472034</link><dc:creator>achatham</dc:creator><comments>https://news.ycombinator.com/item?id=42472034</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=42472034</guid></item></channel></rss>