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Show HN: Timep – A next-gen profiler and flamegraph-generator for bash code

news.ycombinator.com Unknown 2025-11-01 13:17:44

timep timep is an efficient and state-of-the-art trap-based time profiler for bash code. timep generates a per-command execution time profile for the bash code being profiled. As it generates this profile, timep logs command runtimes+metadata hierarchically based on both function and subshell nesting depth, mapping and recreating the complete full call-stack tree for the bash code being profiled. MAJOR UPDATE RELEASED: The new timep (currently v1.3) now includes the required loadable binary as

Topics: echo flamegraph profile time timep

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How to make things slower so they go faster

news.ycombinator.com Unknown 2025-10-31 23:10:10

Synchronized demand is the moment a large cohort of clients acts almost together. In a service with capacity $\mu$ requests per second and background load $\lambda_0$, the usable headroom is $H = \mu - \lambda_0 > 0$. When $M$ clients align—after a cache expiry, at a cron boundary, or as a service returns from an outage—the bucketed arrival rate can exceed $H$ by large factors. Queues form, timeouts propagate, retries synchronize, and a minor disturbance becomes a major incident. The task is to

Topics: delay headroom rate time varepsilon

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A visual introduction to big O notation

news.ycombinator.com Unknown 2025-11-01 16:39:36

Big O notation is a way of describing the performance of a function without using time. Rather than timing a function from start to finish, big O describes how the time grows as the input size increases. It is used to help understand how programs will perform across a range of inputs. In this post I'm going to cover 4 frequently-used categories of big O notation: constant, logarithmic, linear, and quadratic. Don't worry if these words mean nothing to you right now. I'm going to talk about them

Topics: function items return sum time

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I retested GPT-5's coding skills using OpenAI's guidance - and now I trust it even less

zdnet.com David Gewirtz 2025-11-03 15:16:03

seamartini/iStock/Getty Images Plus Follow ZDNET: Add us as a preferred source on Google. ZDNET's key takeaways The same prompts in GPT-5 yield success, crashes, or errors. OpenAI's prompt optimizer helps, but introduces its own quirks. AI "unconsciously" adding details raises trust concerns. Do AI's get headaches? Because GPT-5 has certainly been giving me one. This article was going to be so easy. OpenAI came out with a list of best practices for GPT-5 coding. All I was going to do was t

Topics: ai case gpt test time

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How to Make Things Slower So They Go Faster

news.ycombinator.com Unknown 2025-11-02 00:10:10

Synchronized demand is the moment a large cohort of clients acts almost together. In a service with capacity $\mu$ requests per second and background load $\lambda_0$, the usable headroom is $H = \mu - \lambda_0 > 0$. When $M$ clients align—after a cache expiry, at a cron boundary, or as a service returns from an outage—the bucketed arrival rate can exceed $H$ by large factors. Queues form, timeouts propagate, retries synchronize, and a minor disturbance becomes a major incident. The task is to

Topics: delay headroom rate time varepsilon

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From Hackathon to YC

news.ycombinator.com Neha Suresh 2025-11-04 08:08:26

This story is being published in the Product Hunt Weekly Newsletter. If you'd like to read more stories like this, subscribe here. 🌟 Hey everyone, I’m Neha, the founder of @April — an AI executive assistant that keeps your inbox, calendar, and meeting prep under control so you can finally get your time back. April exists because of a hackathon I almost skipped, my car crashing into a pillar… and a YC interview I never saw coming. The Hackathon That Changed Everything It's the end of May 2025.

Topics: april like people time yc

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Show HN: Sping – An HTTP/TCP latency tool that's easy on the eye

news.ycombinator.com Unknown 2025-11-04 09:42:01

Latest Version: 0.2.11 service-ping (sping) Modern terminal HTTP/TCP latency monitoring tool with real-time visualization. Think httping meets modern CLI design with rich terminal UI, phase timing, and advanced analytics. Status: Feature-complete MVP with HTTP/TCP support, phase timing, outlier detection, and comprehensive monitoring capabilities. Demo Real-time latency monitoring with interactive charts showing HTTP response times, outlier detection, and live statistics. Why? I've freque

Topics: color com example sping time

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Ether rises to a fresh record, bitcoin erases gains from Jackson Hole rally

cnbc.com Tanaya Macheel 2025-11-04 14:28:39

Ether rose to a new record over the weekend, after hitting an all-time high Friday for the first time since 2021. The price of the second largest cryptocurrency rose as high as $4,954.81 on Sunday afternoon. It was last higher by less than 1% at $4,776.46. Meanwhile, bitcoin at one point erased all the gains from its Friday rally, falling as low as $110,779.01, its lowest level since July 10. It was last trading lower by nearly 2% at about $112,000. The flagship cryptocurrency hit its most rec

Topics: cryptocurrency friday high rose time

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Go-away – Customizable, conditional challenges to incoming requests

news.ycombinator.com Unknown 2025-10-31 15:00:14

Challenges Operators can choose to serve a challenge to incoming requests or client, depending on conditions or other rules. Challenges can be transparent (not shown to user, depends on backend or other logic), non-JavaScript (challenges common browser properties), or custom JavaScript (from Proof of Work to fingerprinting or Captcha is supported) The following examples are defined in policy snippets and are ready to use. Challenges can be redefined or new ones entirely can be added with diff

Topics: challenge challenges http refresh runtime

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Why was Apache Kafka created?

news.ycombinator.com Stanislav Kozlovski 2025-11-02 18:31:41

Reading Time: 13 minutes Intro - the Integration Problem We talk all the time about what Kafka is, but not so much about why it is the way it is. What better way than to dive into the original motivation for creating Kafka? Circa 2012, LinkedIn’s original intention with Kafka was to solve a data integration problem. LinkedIn used site activity data (e.g. someone liked this, someone posted this) for many things - tracking fraud/abuse, matching jobs to users, training ML models, basic feature

Topics: data kafka schema schemas time

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Waitgroups: What they are, how to use them and what changed with Go 1.25

news.ycombinator.com Matheus Mina 2025-11-04 06:21:51

Imagine the following problem: you need to process hundreds of records and generate a single output. One way to solve this is to process each record sequentially and unify the output only at the end. However, this can be extremely slow, depending on the time spent processing each record. Another way is to process them concurrently, speeding up the overall time. In my post about introduction to concurrency, I talked a bit about goroutines and channels . Now, I’ve decided to talk about waitgroups

Topics: func goroutines time waitgroup wg

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What’s on your desk, Dominic Preston?

theverge.com Dominic Preston 2025-11-04 06:00:00

Not all of The Verge’s staff live in the US. For example, news editor Dominic Preston is based in London and is, as he says, “responsible for keeping our news coverage ticking over in UK mornings before the US team comes online.” He also curates our new Verge Daily newsletter and covers Android phones, especially all the models that don’t launch in the US. And outside of work? “I’m a bit of a food obsessive,” he says, “and run a newsletter called Braise where I review London restaurants and coo

Topics: desk good time ve work

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Bose’s compact TV Speaker is more than $100 off right now

theverge.com Brandon Russell 2025-11-04 08:41:24

Posts from this author will be added to your daily email digest and your homepage feed. If you’re looking to upgrade your movie night, a soundbar is an easy way to beef up the audio. While there are some high-priced options out there, you don’t have to spend a lot to actually hear a movie’s dialog. Right now, the Bose TV Speaker is down to $163.45 (about $115 off) at Amazon, the lowest price we’ve seen yet. The Bose TV Speaker is a solid starter soundbar that can easily integrate into existing

Topics: amazon bose controller currently time

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Building a computer in the 90s (2019)

news.ycombinator.com Dave Farquhar 2025-11-04 05:18:46

Last Updated on March 19, 2024 by Dave Farquhar Building a computer in the 90s was different than it is today. It wasn’t just harder or more expensive. It seemed like every new build was an adventure. I probably built a few hundred systems before the decade ended, but the first few were definitely the most memorable. One in particular stands out above the rest. It was 1996. My friend Tom wanted a modern computer that was capable of handling photography work. He was in his early 20s at the time

Topics: case computer parts stores time

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What the Hell Is Going On?

news.ycombinator.com Unknown 2025-11-06 04:08:01

What the hell is going on right now? Engineers are burning out. Orgs expect their senior engineering staff to be able to review and contribute to “vibe-coded” features that don’t work. My personal observation is that the best engineers are highly enthusiastic about helping newer team members contribute and learn. Instead of their comments being taken to heart, reflected on, and used as learning opportunities, hapless young coders are instead using feedback as simply the next prompt in their “A

Topics: ai company right time work

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11 Tips for Getting Started in Metal Gear Solid Delta: Snake Eater

cnet.com See Full Bio 2025-11-07 04:01:05

Metal Gear Solid Delta: Snake Eater is the best way to play one of the greatest Metal Gear games of all time. However, like most Hideo Kojima games, the Metal Gear Solid series features unique gameplay and mechanics. Whether you're a veteran fan of the series or experiencing Snake Eater for the very first time, the new modes and gameplay tweaks will be sure to satisfy you. Here are 11 tips to keep in mind when jumping into Metal Gear Solid Delta. Pause cutscenes if you need to Hideo Kojima's

Topics: eater game gun snake time

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Apple fitness exec accused of creating toxic workplace environment

engadget.com Unknown 2025-11-08 06:55:56

Jay Blahnik is Apple's vice president of fitness technologies and responsible for leading a team of about 100 people. After a lengthy period consulting for Nike, he joined the company in 2013 to help with the launch of the Apple Watch and programs such as Apple Fitness+. Today, The New York Times reported on allegations that Blahnik created a toxic workplace environment, with his behaviors described as "verbally abusive, manipulative and inappropriate." He and Apple are currently being sued by

Topics: apple blahnik company times told

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Here’s everything new for FaceTime in iOS 26

9to5mac.com Ryan Christoffel 2025-11-08 11:56:17

iOS 26 gives the FaceTime app a whole new design and layout, plus new tools for filtering calls, the powerful Live Translation feature, and more. Here’s everything new. New home screen When you first open FaceTime, you’ll be met by an entirely redesigned home screen. The previous list of recent calls and contacts has been replaced by a new, card-like interface. Cards prominently display contact photos for the people you’ve recently FaceTimed, or suggestions of people you might want to call.

Topics: 26 calls facetime ios new

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Adding my home electricity uptime to status.href.cat

news.ycombinator.com .Wp-Block-Post-Author-Name Box-Sizing Border-Box 2025-11-08 15:54:15

status.href.cat now reports and notifies me if my home power/internet goes down! The other day, PG&E and my landlord emailed me about a power outage. The elevator system needed a technician to reset it. All the e-key readers in the lobby no longer work. This got me wondering, how long was the power out for? With this, I decided to add uptime stats for my home electricity. PG&E emailed about the power outage. 10 minutes later, my power was restored. My landlord emailed, reporting all the things

Topics: code home power software uptime

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7 Best Sunrise Alarm Clocks to Snag Before the Fall 2025 Time Change

wired.com Nena Farrell 2025-11-09 06:20:00

The Casper Glow Light is one of the smallest lights I've tested, but it managed to be plenty bright to wake me up in the morning. Not only is this little light incredibly bright, it's also super simple to use with both physical controls and app setup. Within the Casper Glow app—which is unfortunately iOS only—you set up your wake-up time, and the Glow Light will start to brighten 30 minutes before that set time. You can also set how long you want your Glow Light to dim for, which it will use bot

Topics: glow light set time use

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Nothing’s retro-looking Headphone 1 are already $30 off

theverge.com Brandon Russell 2025-11-10 21:26:21

Posts from this author will be added to your daily email digest and your homepage feed. Nothing’s Headphone 1 hit the scene back in July, and they’re already being discounted. Right now, you can pick up the brand’s first pair of over-the-ear headphones for an all-time low price of $269 ($30 off) at Amazon and Nothing’s online storefront. What makes the Headphone 1 unique is their retro-transparent design that Nothing introduced with the Phone 1. Similar to other high-end headphones, they suppo

Topics: amazon ear headphone low time

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Ordered Insertion Optimization in OrioleDB

news.ycombinator.com Unknown 2025-11-09 20:54:47

When many sessions try to insert into the same B-tree leaf page, classic exclusive page locking serializes progress and wastes time on sleep/wake cycles. We’re introducing a batch page insertion path that lets the session holding the page lock insert for itself and its neighbors. The result: dramatically reduced lock waits, and big gains at high client counts (2X throughput boost starting from 64 clients in our benchmark). In OrioleDB beta12, inserts into a B-tree leaf are performed under an ex

Topics: 10 current_timestamp lock page random

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Life360 adds a new no-show notification to its app

techcrunch.com Ivan Mehta 2025-11-11 16:00:00

Location-tracking app Life360 announced today that it is adding a new notification to its app that lets users know when a friend or a family member doesn’t arrive at a particular location at a designated time. This feature aims to help users from constantly tracking the location of someone to check if they reached a place safely. Life360 said it is launching the new no-show notification during the back-to-school season to reduce parents’ stress about their children getting to school. The compan

Topics: life360 location said set time

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One of our favorite air fryers is on sale for $90

engadget.com Unknown 2025-11-11 21:00:00

The COSORI 9-in-1 air fryer is on sale for $90, cutting 25 percent off the retail price. Whether you've stumbled upon air fryers for health reasons , convenience or you're already a card-carrying member of the air fryer clan, a sale is a great time to pick one up. We selected the COSORI as the runner-up for best air fryer overall , and were impressed with its six-quart capacity despite its relatively small footprint on the kitchen counter. Our reviewers found the basket was super roomy enough t

Topics: air basket cosori fryer time

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Scientists Just Caught Human Embryo Implantation on Camera

wired.com Javier Carbajal 2025-11-11 21:18:22

A team of researchers at the Institute for Bioengineering of Catalonia (IBEC) in Spain has succeeded, for the first time, in recording in real time and in 3D the implantation of a human embryo. This achievement opens up the possibility of investigating in greater depth the causes of infertility and discovering new assisted reproduction treatments. Failure of embryo implantation in the uterus is one of the major barriers to pregnancy, and is associated with about 60 percent of miscarriages. This

Topics: embryo implantation real time uterus

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The best wireless mice for 2025

engadget.com Unknown 2025-11-12 18:01:26

There’s a reason the MX Master 3S is right up the top of our list. The ergonomic design almost feels like a hand rest that places three customizable buttons and a second scroll wheel within easy reach of your thumb. Every button is configurable via Logitech’s Options+ software, which is a treasure trove of productivity potential. Beyond standard customization options such as click-speed and scroll direction, you can assign all manner of shortcuts and create profiles for specific apps — so the b

Topics: 3s click master mx time

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Your next customer is on the TechCrunch Disrupt 2025 expo floor — will they find you or your competitor?

techcrunch.com Techcrunch Events 2025-11-13 20:07:51

TechCrunch Disrupt 2025 lands in San Francisco from October 27-29, and the Expo Hall is already packed with early adopters, startup scouts, and enterprise buyers looking to discover what’s next. If you’re not there to show off your product, your competitors will be — and they’ll be closing deals that could’ve been yours. There’s still time to book your exhibit table, but space is disappearing fast. The brands that move now will be the ones getting the face time, the leads, and the traction that

Topics: 10 access table techcrunch time

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CEO pay at top US companies accelerates at fastest pace in 4 years

news.ycombinator.com Unknown 2025-11-14 06:16:22

Try unlimited access Only $1 for 4 weeks Then $75 per month. Complete digital access to quality FT journalism on any device. Cancel anytime during your trial.

Topics: 75 access anytime cancel complete

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Candle Flame Oscillations as a Clock

news.ycombinator.com Unknown 2025-11-10 17:49:51

Todays candles have been optimized for millenia not to flicker. But it turns out when we bundle three of them together, we can undo all of these optimizations and the resulting triplet will start to naturally oscillate. A fascinating fact is that the oscillation frequency is rather stable at ~9.9Hz as it mainly depends on gravity and diameter of the flame. We use a rather unusual approach based on a wire suspended in the flame, that can sense capacitance changes caused by the ionized gases in t

Topics: candle flame hz signal time

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An IRC-Enabled Lawn Mower (2021)

news.ycombinator.com Unknown 2025-11-12 00:48:35

After 25 years, I still love Undernet, and I still chat there every day. Most of the friends I made back in the 90s aren't around anymore, but I still get to meet new and interesting people all the time, and I love the group of amazing friends I have there today. And it was one of them who suggested this project... Now, I grew up in a rural area of the southern US, and I had never been out of the South, but on Undernet, I met people in other states, other countries, even other continents! I mad

Topics: case irc lawnmower pi time

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Latest Tech News

Show HN: Timep – A next-gen profiler and flamegraph-generator for bash code

How to make things slower so they go faster

A visual introduction to big O notation

I retested GPT-5's coding skills using OpenAI's guidance - and now I trust it even less

How to Make Things Slower So They Go Faster

From Hackathon to YC

Show HN: Sping – An HTTP/TCP latency tool that's easy on the eye

Ether rises to a fresh record, bitcoin erases gains from Jackson Hole rally

Go-away – Customizable, conditional challenges to incoming requests

Why was Apache Kafka created?

Waitgroups: What they are, how to use them and what changed with Go 1.25

What’s on your desk, Dominic Preston?

Bose’s compact TV Speaker is more than $100 off right now

Building a computer in the 90s (2019)

What the Hell Is Going On?

11 Tips for Getting Started in Metal Gear Solid Delta: Snake Eater

Apple fitness exec accused of creating toxic workplace environment

Here’s everything new for FaceTime in iOS 26

Adding my home electricity uptime to status.href.cat

7 Best Sunrise Alarm Clocks to Snag Before the Fall 2025 Time Change

Nothing’s retro-looking Headphone 1 are already $30 off

Ordered Insertion Optimization in OrioleDB

Life360 adds a new no-show notification to its app

One of our favorite air fryers is on sale for $90

Scientists Just Caught Human Embryo Implantation on Camera

The best wireless mice for 2025

Your next customer is on the TechCrunch Disrupt 2025 expo floor — will they find you or your competitor?

CEO pay at top US companies accelerates at fastest pace in 4 years

Candle Flame Oscillations as a Clock

An IRC-Enabled Lawn Mower (2021)

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