# opt (blogs) — RSS Amplifier Recent posts from the 4 feeds in the RSS Amplifier directory that cover opt. Page: Feed: --- ## [Stop Applying to Jobs You’re 100% Qualified For](https://leelayanamaddi.substack.com/p/stop-applying-to-jobs-youre-100-qualified) _2026-08-19 · Leela Yanamaddi · Leela From Scale.jobs_ This one’s going to feel counterintuitive. ## [Why "Perfect and Late" Loses to "Good and Early"](https://leelayanamaddi.substack.com/p/the-48-hour-window-nobody-warns-you) _2026-08-13 · Leela Yanamaddi · Leela From Scale.jobs_ I’m going to share the single most underrated stat in job searching. ## [La Nouméenne OPT 2026 : marchons ensemble contre le cancer du sein !](https://office.opt.nc/fr/actualites/la-noumeenne-opt-2026-marchons-ensemble-contre-le-cancer-du-sein) _2026-08-10 · CamilleDumarty · OPT-NC_ Le dimanche 4 octobre 2026, La Nouméenne OPT revient pour sa 21 ᵉ édition. Chaque année, cette marche 100 % féminine rassemble des milliers de Calédoniennes autour d'une même cause : la lutte contre le cancer du sein. ## [After 300 Applications, This Is the Only Number That Actually Matters.](https://leelayanamaddi.substack.com/p/the-hidden-math-behind-300-job-applications) _2026-08-06 · Leela Yanamaddi · Leela From Scale.jobs_ Instead of tracking total applications this week, track your "real applications"early, relevant, and tailored. You might be surprised how much that changes your interview rate. ## [The 6-Second Rule Is a Lie (Here's the Real Number About Resume Review)](https://leelayanamaddi.substack.com/p/the-6-second-rule-is-a-lie-heres) _2026-07-31 · Leela Yanamaddi · Leela From Scale.jobs_ Let me tell you about a candidate who almost gave up. ## [Stop Answering the Salary Question Honestly](https://leelayanamaddi.substack.com/p/the-salary-question-that-ends-interviews) _2026-07-21 · Leela Yanamaddi · Leela From Scale.jobs_ A candidate messaged us last week: "I said my expected salary and the recruiter went quiet." Here's what actually happened next. ## [Skip the H1B Lottery: The Complete Cap-Exempt Employer List (2026)](https://leelayanamaddi.substack.com/p/the-h1b-lottery-has-a-loophole-nobody) _2026-07-09 · Leela Yanamaddi · Leela From Scale.jobs_ You can skip the H1B lottery. Here's how ## [How to Spot a Fake Job Posting in 60 Seconds?](https://leelayanamaddi.substack.com/p/how-to-spot-a-fake-job-posting-in) _2026-05-12 · Leela Yanamaddi · Leela From Scale.jobs_ 5 Red Flags You Can Check Before You Write a Single Word of Your Cover Letter. ## [Hidden H1B red flags you must spot before applying](https://leelayanamaddi.substack.com/p/h1b-red-flags-hidden-inside-job-descriptions) _2026-05-05 · Leela Yanamaddi · Leela From Scale.jobs_ Spot hidden H1B red flags in job descriptions before you apply. Avoid risky roles, fake sponsorships, and costly mistakes. ## [If You're on OPT Right Now, Read This Before You Apply Anywhere](https://leelayanamaddi.substack.com/p/h-1b-opt-f1-your-honest-job-search) _2026-04-28 · Leela Yanamaddi · Leela From Scale.jobs_ Step-by-step strategies to land interviews and survive the 2026 hiring reality ## [Chovy's Blog: Agentic Coding (Sponsored)](https://crawlproof.com/a/r7OwCcwrJKMT) _2026-04-28 · **Sponsored**_ Personal posts on agentic coding, moshcode CLI, and security findings. ## [What Your Boss Knows That You Don't (And How to Prepare)](https://leelayanamaddi.substack.com/p/i-was-laid-off-in-this-brutal-job) _2026-04-21 · Leela Yanamaddi · Leela From Scale.jobs_ Let’s talk about the job market, not the optimistic projections, but the real-world reality most people avoid. ## [Campagne du Rêve 2026 : un SMS pour réaliser un rêve](https://office.opt.nc/fr/actualites/campagne-du-reve-2026-un-sms-pour-realiser-un-reve) _2026-03-16 · CamilleDumarty · OPT-NC_ Du 16 mars au 16 mai 2026, soutenez l’Association les Petits Pansements du Cœur - APPC et les enfants malades chroniques suivis au Médipôle : envoyez DON par SMS au 3677. Un geste simple, un vrai coup de pouce pour rendre leurs rêves possibles. ## [Découvrez les Points Conseil Numérique (PCN) dans les agences OPT-NC](https://office.opt.nc/fr/decouvrez-les-points-conseil-numerique-pcn-dans-les-agences-opt-nc) _2026-02-12 · 3527KAL · OPT-NC_ Accueil Découvrez les Points Conseil Numérique (PCN) dans les agences OPT-NC Besoin d’un coup de pouce pour vos démarches en ligne ? Nos Points Conseil Numérique (PCN) vous accompagnent gratuitement pour vous aider à naviguer dans le monde du numérique. ✅ Objectif 12 février 2026 ## [Les services « connectivité » et les partenaires disponibles dans vos agences OPT‑NC](https://office.opt.nc/fr/les-services-connectivite-et-les-partenaires-disponibles-dans-vos-agences-opt-nc) _2026-02-11 · 3527KAL · OPT-NC_ Accueil Les services « connectivité » et les partenaires disponibles dans vos agences OPT‑NC Dans le cadre de sa mission de proximité et d’innovation, l’OPTNC modernise ses agences et élargit l’éventail des services accessibles à tous les Calédoniens. Désormais, au-delà de vos opérations 12 février 2026 ## [Comment rejoindre l'OPT-NC ?](https://office.opt.nc/fr/emploi-et-carriere/comment-rejoindre-l-opt-nc) _2026-02-03 · 3527KAL · OPT-NC_ Accueil Comment rejoindre l'OPT-NC ? Chaque jour, de nouveau talents nous rejoignent. Pourquoi pas vous ? 04 février 2026 ## [Nos métiers à l’OPT-NC](https://office.opt.nc/fr/emploi-et-carriere/nos-metiers-l-opt-nc) _2026-02-03 · webdev · OPT-NC_ Accueil Nos métiers à l’OPT-NC L’OPT-NC intervient dans les activités de télécommunications, postales, de services financiers et de la distribution via son réseau d’agences. Derrière nos collaborateurs qui œuvrent quotidiennement 04 février 2026 ## [Notre politique RH OPT-NC](https://office.opt.nc/fr/emploi-et-carriere/notre-politique-rh-opt-nc) _2026-02-03 · 3527KAL · OPT-NC_ Accueil Notre politique RH OPT-NC Donnez du sens à votre carrière ! À l’OPT-NC, chacun compte. 04 février 2026 ## [Amélie SONG : rendre l’information RH simple, utile et accessible](https://office.opt.nc/fr/actualites/amelie-song-rendre-l-information-rh-simple-utile-et-accessible) _2026-02-02 · CamilleDumarty · OPT-NC_ Entrée à l’OPT-NC à 20 ans, notre collègue Amélie Song a construit son parcours entre agences, service prévention et ressources humaines (RH). Depuis octobre 2025, elle est chargée de clientèle RH : un point d’entrée pour orienter, répondre et faciliter l’accès à l’info pour l’ensemble du personnel de l’office. ## [Header générique](https://office.opt.nc/fr/slide/header-generique) _2026-01-27 · 3527KAL · OPT-NC_ Suivant Header générique OPT-NC, un seul portail pour tous vos services essentiels. ## [Voeux 2026](https://office.opt.nc/fr/slide/voeux-2026) _2026-01-18 · 3527KAL · OPT-NC_ Suivant Voeux 2026 ## [AI QA that opens fix PRs (Sponsored)](https://crawlproof.com/a/WMxAlH46xBSU) _2026-01-18 · **Sponsored**_ Run a browser QA from plain-English instructions; get GitHub issues and optional fix PRs. ## [When good threads go bad](https://jpcamara.com/2025/12/30/when-good-threads-go-bad.html) _2025-12-30 · JP Camara_ 👋🏼 This is part of series on concurrency, parallelism and asynchronous programming in Ruby. It’s a deep dive, so it’s divided into several parts: Your Ruby programs are always multi-threaded: Part 1 Your Ruby programs are always multi-threaded: Part 2 Consistent, request-local state Ruby methods are colorless The Thread API Bitmasks, Ruby Threads and Interrupts, oh my! When good threads go bad… ## [Bitmasks, Ruby Threads and Interrupts, oh my!](https://jpcamara.com/2025/10/21/bitmasks-threads-and-interrupts.html) _2025-10-22 · JP Camara_ 👋🏼 This is part of series on concurrency, parallelism and asynchronous programming in Ruby. It’s a deep dive, so it’s divided into several parts: Your Ruby programs are always multi-threaded: Part 1 Your Ruby programs are always multi-threaded: Part 2 Consistent, request-local state Ruby methods are colorless The Thread API Bitmasks, Ruby Threads and Interrupts, oh my! When good threads go bad… ## [The /o in Ruby regex stands for “oh the humanity!”](https://jpcamara.com/2025/08/02/the-o-in-ruby-regex.html) _2025-08-02 · JP Camara_ Your code using the /o modifier Source: wikipedia Hi there! Do you like Regex? Do you like performance? Do you like creating confounding bugs for yourself rooted in the mechanics of the Ruby VM itself? If you said yes to all of the above, have I got a feature for you! But first, let’s start with a story. The cliffs of insanity I was recently reviewing some code, and part of the functionality was… ## [As of July 1, 2025, find me at liberationtoolbox.io, away from Substack](https://ykhong.substack.com/p/as-of-july-1-2025-find-me-at-liberationtoolboxio) _2025-07-15 · YK Hong · Liberation Toolbox_ Subscribe at liberationtoolbox.io instead of on here at Substack. ## [Empire's War Lies](https://ykhong.substack.com/p/empires-war-lies) _2025-06-21 · YK Hong · Liberation Toolbox_ Lies lies lies. ## [Anti-Blackness Was a Decision White People Made on Purpose](https://ykhong.substack.com/p/anti-blackness-was-a-decision-white) _2025-06-19 · YK Hong · Liberation Toolbox_ And they keep doing it. ## [Empire's Single Engine](https://ykhong.substack.com/p/empires-single-engine) _2025-06-15 · YK Hong · Liberation Toolbox_ It only has one purpose. ## [Post Protest Tips](https://ykhong.substack.com/p/post-protest-tips) _2025-06-15 · YK Hong · Liberation Toolbox_ Just a few, and interdependence. ## [Some People Will Be Angry At You](https://ykhong.substack.com/p/some-people-will-be-angry-at-you) _2025-06-12 · YK Hong · Liberation Toolbox_ Anger can wake people up. ## [Resistance on Highways](https://ykhong.substack.com/p/resistance-on-highways) _2025-06-10 · YK Hong · Liberation Toolbox_ Whose streets? Our streets. ## [From any door to your door (Sponsored)](https://crawlproof.com/a/ZTBBwD4l18Fh) _2025-06-10 · **Sponsored**_ Book rides, errands, deliveries, groceries and home help in one app ## [June Uprisings from Korea to California](https://ykhong.substack.com/p/june-uprisings-from-korea-to-california) _2025-06-10 · YK Hong · Liberation Toolbox_ June is a great month for uprisings. ## [The United States is at War with its People](https://ykhong.substack.com/p/the-united-states-is-at-war-with) _2025-06-08 · YK Hong · Liberation Toolbox_ We are not in times of peace. ## [The U.S. Empire is More Martial Law than Martial Law](https://ykhong.substack.com/p/the-us-empire-is-more-martial-law) _2025-06-08 · YK Hong · Liberation Toolbox_ Empire has always been waging war against the People. ## [A silly optimization: adding opt\_respond\_to to the Ruby VM, part 6](https://jpcamara.com/2025/01/04/a-silly-optimization-adding-optrespondto.html) _2025-01-07 · JP Camara_ In part 5 , we finally got our new instruction defined and outputting as part of our bytecode. if you didn’t run it yourself, you just had to trust me that it really did run. But, I just dropped most of the implementation code in without explaining it. Let’s start off by walking through the basic version, then start planning for the true optimization. The progress so far Here’s our sample Ruby… ## [Defining an instruction: adding opt\_respond\_to to the Ruby VM, part 5](https://jpcamara.com/2024/12/30/defining-an-instruction-adding-optrespondto.html) _2025-01-01 · JP Camara_ In Peephole optimizations: adding opt\_respond\_to to the Ruby VM, part 4 , we dug deep. We found the connection between prism compilation and the specialization we need for our new bytecode, called “peephole optimization”. We learned how to debug and step through C code in the Ruby runtime, and we added some logic for matching the “pattern” of the instruction we want to change. Now that we know… ## [Peephole optimizations: adding \`opt\_respond\_to\` to the Ruby VM, part 4](https://jpcamara.com/2024/12/27/peephole-optimizations-adding-optrespondto-to.html) _2024-12-28 · JP Camara_ In The Ruby Syntax Holy Grail: adding opt\_respond\_to to the Ruby VM, part 3 , I found what I referred to as the “Holy Grail” of Ruby syntax. I’m way overstating it, but it’s a readable, sequential way of viewing how a large portion of the Ruby syntax is compiled. Here’s a snippet of it as a reminder: // prism\_compile.c static void pm\_compile\_node (rb\_iseq\_t \* iseq,… ## [The Ruby Syntax Holy Grail: adding \`opt\_respond\_to\` to the Ruby VM, part 3](https://jpcamara.com/2024/12/25/the-ruby-syntax-holy-grail.html) _2024-12-26 · JP Camara_ In Finding the compiler: adding opt\_respond\_to to the Ruby VM, part 2 , I found the entrypoint into the compiler! It takes the root of our abstract syntax tree - pm-\>node - and produces a rb\_iseq\_t . rb\_iseq\_t is an “InstructionSequence”, which represents our virtual machine bytecode. Here’s the code where we left off: // ruby.c static VALUE process\_options ( int argc, char \*\*… ## [Finding the compiler: adding \`opt\_respond\_to\` to the Ruby VM, part 2](https://jpcamara.com/2024/12/22/finding-the-compiler.html) _2024-12-23 · JP Camara_ In Adding opt\_respond\_to to the Ruby VM: part 1 , inspired by recent JSON gem optimizations, I setup my goal: I want to add a new bytecode instruction to the Ruby VM which optimizes respond\_to? calls. I took this Ruby code: if $stdout . respond\_to?( :write ) puts 'Did you know you can write to $stdout?' end And identified what bytecode instructions matter most (I think): == disasm:… ## [Adding \`opt\_respond\_to\` to the Ruby VM: part 1](https://jpcamara.com/2024/12/22/adding-optrespondto-to.html) _2024-12-22 · JP Camara_ @byroot has been posting a series on optimizations he and others have made to the json gem, and it’s been 🔥🔥🔥. Enjoyable and informative, I highly recommend reading what he’s posted so far. In his second post , he mentions the possibility of improving performance by adding an additional method cache. This would involve compiling respond\_to? calls in a special way: It actually… ## [20 days of ruby gems: part 1](https://jpcamara.com/2024/12/16/days-of-ruby.html) _2024-12-17 · JP Camara_ Over on BlueSky, Gregory Brown suggested a #20daygemchallenge . Post gems you’ve either used time and time again, or have inspired you in some way, in no particular order. Mohit Sindhwani suggested writing about them at the end, which sounded like a great idea! I’m breaking it into two parts. Here’s my breakdown of my first 10 gems posted: First is HTTParty : https://github.com/jnunemaker/httparty… ## [My RubyConf talk is now on YouTube!](https://jpcamara.com/2024/12/14/my-rubyconf-talk.html) _2024-12-15 · JP Camara_ I was honored to present a talk on Ruby concurrency at RubyConf 2024. It represents a high-level distillation of much of my writing and research over the past year. The conference itself was great, and presenting was such a fun experience. Here is the talk, titled “In-Depth Ruby Concurrency: Navigating the Ruby Concurrency Landscape”: If you want the slides, I’ve published them as a short YouTube… ## [Speeding up Ruby by rewriting C… in Ruby](https://jpcamara.com/2024/12/01/speeding-up-ruby.html) _2024-12-04 · JP Camara_ There is a recent language comparison repo which has been getting shared a lot. In it, CRuby was the third slowest option, only beating out R and Python. The repo author, @BenjDicken , created a fun visualization of each language’s performance. Here’s one of the visualizations, which shows Ruby as the third slowest language benchmarked: The code for this visualization is from… ## [My MacOS setup for hacking on CRuby](https://jpcamara.com/2024/12/02/my-macos-setup.html) _2024-12-03 · JP Camara_ I recently posted my docker setup for hacking on CRuby , which showed how I test Linux features when working on CRuby. But most of the time, I just build CRuby directly on MacOS. The Building Ruby guide from ruby-lang.org is the most up-to-date guide on doing this, but I like to spell it out exactly in order of how I do it day-to-day. So this is for me more than anything, but you may find it… ## [Counting C method calls in CRuby](https://jpcamara.com/2024/11/28/counting-c-method.html) _2024-11-28 · JP Camara_ There is a central macro in CRuby, RUBY\_VM\_CHECK\_INTS , which is a very hot path for the Ruby runtime. It’s an important part of how threads are managed, and it’s called constantly . I was curious just how often it was called, and it turned out CRuby comes with some handy debugging functionality for just this scenario. Inside of debug\_counter.h , I changed #define USE\_DEBUG\_COUNTER 0… ## [My docker setup for hacking on CRuby](https://jpcamara.com/2024/11/27/my-docker-setup.html) _2024-11-27 · JP Camara_ I run on MacOS, but I often want to test Linux behaviors when working on the CRuby implementation. Here’s the Dockerfile I use: FROM ubuntu:24.04 # Preventing dialog prompts when installing packages ENV DEBIAN\_FRONTEND=noninteractive # Update and install basic build dependencies and Rust RUN apt-get update && apt-get install -y \\ git \\ curl \\ build-essential \\ autoconf \\ libreadline-dev \\… ## [Calculating the largest known prime in Ruby](https://jpcamara.com/2024/11/26/looking-to-impress.html) _2024-11-27 · JP Camara_ Looking to impress your Ruby friends by calculating the largest known prime, 2 \*\* 136\_279\_841-1 ? On Ruby 3.4.0-preview2 and earlier, 2 \*\* 136\_279\_841-1 logs a warning and returns Infinity 😔: 2 \*\* 136\_279\_841 - 1 # warning: in a\*\*b, b may be too big # =\> Infinity Thanks to @mametter , Ruby 3.4 will handle this calculation just fine! See Do not round a\*\*b to infinity . Knowing this, you excitedly… ## [The Thread API : Concurrent, colorless Ruby](https://jpcamara.com/2024/08/26/the-thread-api-concurrent-colorless.html) _2024-08-26 · JP Camara_ 👋🏼 This is part of series on concurrency, parallelism and asynchronous programming in Ruby. It’s a deep dive, so it’s divided into 12 main parts: Your Ruby programs are always multi-threaded: Part 1 Your Ruby programs are always multi-threaded: Part 2 Consistent, request-local state Ruby methods are colorless The Thread API Bitmasks, Ruby Threads and Interrupts, oh my! When good threads go bad…