The hottest Performance Substack posts right now

And their main takeaways
Category
Top Finance Topics

Stars are treated differently

Klement on Investing • 1 implied HN point • 17 Dec 24
💰 Finance Performance
  1. Star analysts have a bigger influence than regular analysts because their reports can move markets. They are rewarded for giving high-quality forecasts that help investors succeed.
  2. To become a star, analysts need to make good predictions, but staying a star often means making bold and risky calls instead of focusing on quality.
  3. Once an analyst becomes a star, they are judged less harshly for mistakes. This means they can take more risks and make big headlines, even if it doesn't always lead to good outcomes.

033: Can Fat Fuel the Athlete?

Harnessing the Power of Nutrients • 19 implied HN points • 08 Jul 17
🏥 Health & Wellness Performance
  1. Different fuel sources are utilized at different rates during athletic activities, with fat providing a lot of energy but slowly, and glucose supplying energy rapidly.
  2. Studies have shown that for high-intensity activities, glucose is essential, whereas fat can be beneficial for longer duration, lower intensity exercises.
  3. Balancing fat and glucose intake is crucial for athletic performance, as each type of fuel has its own advantages and is used differently by the body during exercise.
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The Case Against [unowned self]

Jacob’s Tech Tavern • 2 HN points • 08 Jan 24
🕹 Technology Performance
  1. Swift uses references to manage memory with classes, closures, and actors, pointing to memory locations on the heap.
  2. Strong references in Swift ensure memory is retained while in use and deallocated when no longer needed.
  3. Weak references in Swift allow objects to point at each other without creating retain cycles and prevent memory leaks.

System Design Concepts: Dive deep into Database Sharding Strategies

Engineering At Scale • 2 HN points • 05 Aug 23
🕹 Technology Performance
  1. Range-Based Sharding divides data based on ranges like organizing books in bookshelves to make searches easier.
  2. Hash-Based Sharding evenly distributes data across different shards using a hash function, but may require data rebalancing when the number of shards changes.
  3. Consistent Hashing minimizes data movement when adding or removing shards, improving scalability while Geo-Based Sharding stores data close to users for better performance.

Connection Pooling — How, what and why? [Case study]

The ZenMode • 1 HN point • 17 Feb 24
🕹 Technology Performance
  1. Connection pooling helps manage database connections efficiently by creating a pool of connections and reusing them instead of opening and closing for each query. This can significantly improve performance and scalability.
  2. Without connection pooling, establishing new connections for each request can lead to slow response times, resource exhaustion, and scalability issues. Connection pooling can help alleviate these problems by minimizing connection creation latency.
  3. When setting up connection pools, consider factors like application workload, expected concurrent users, and database type. Monitor metrics like response times, wait times, and error rates to optimize pool size and configuration for optimal performance.

Zig

Why Now • 1 HN point • 12 Jun 23
🕹 Technology Performance
  1. Zig is a programming language efficient and simple like C, but without hidden surprises in its memory management.
  2. Zig offers developers a clear and explicit approach with minimal language-specific keywords for simplicity and readability.
  3. Zig's toolchain provides various build modes catering to different needs such as Debug, ReleaseSafe, ReleaseSmall, and ReleaseFast.

Wrestling is wrestling but sometimes it sucks

The Author Is Dumb • 1 implied HN point • 29 Apr 23
🎾 Sports Performance
  1. Professional wrestling transitioned from real competition to entertainment to cater to the crowd's desire for entertainment.
  2. The wrestling industry experienced different eras, such as the territorial system, the national expansion by WWE, and the peak popularity during the Attitude Era.
  3. Despite its flaws, pro wrestling uniquely combines storytelling, athleticism, and entertainment, offering a tailored and predetermined form of excitement.

Peak Performance Newsletter #2 | The Passionate Performance Paradox and Dopamine Fasts

The Leadership Lab • 0 implied HN points • 30 Sep 21
🏥 Health & Wellness Performance
  1. When pursuing something you're passionate about, initial performance may decrease due to facing new fears and vulnerabilities.
  2. Fixating on risks can harm performance and hinder opportunities; it's essential to set boundaries for assessing risks.
  3. To maintain performance with risk, track it at intervals that mitigate ruin, and balance between your long-term vision and daily actions.

🐛 Newsletter Wor #17: There's a glitch in the Matrix

Women On Rails Newsletter - International Version • 0 implied HN points • 05 Oct 21
🕹 Technology Performance
  1. The newsletter covers Ruby and Rails news, including new releases like Stimulus 3, Turbo 7, Hotwire 1.0, and Rails 7 alpha.
  2. A Ruby tip about the Splat operator in Ruby for defining methods with unnamed parameters.
  3. Articles on web design elements like how to describe a bug effectively, why hyperlinks are blue, and CSS art creation tips.

What's WebAssembly?

Technically • 0 implied HN points • 06 Mar 24
🕹 Technology Performance
  1. WebAssembly allows developers to write code in faster languages like C++ and Rust that can run in the browser, solving performance limitations of JavaScript.
  2. Code running in the browser can only be written in JavaScript, leading to the development of WebAssembly to execute non-JavaScript code in the browser.
  3. WebAssembly can be used to offload specific parts of applications into modules that run faster, like using C++ or Rust code compiled into WebAssembly for more efficient operations.

Embedded Analytics - Under the Hood

astrodata • 0 implied HN points • 30 Jan 24
🕹 Technology Performance
  1. Embedded analytics bring data to where customers are, sparking curiosity and increasing engagement by providing data in easily interpretable ways.
  2. Themes of modern embedded analytics include leveraging headless BI tools with semantic layers for defining business logic, and ensuring data governance for reliable data access.
  3. Building embedded analytics solutions not only drives product engagement by integrating data analysis seamlessly, but also opens avenues for data monetization and fosters internal data-driven cultures within businesses.

How to Design Software — Feature Flags

Joseph Gefroh • 0 implied HN points • 14 Jul 20
🕹 Technology Performance
  1. Separating deploys from releases can help reduce risk and streamline the development process by allowing code to be sent to production without being immediately visible to users.
  2. Feature flags are a useful tool for enabling or disabling features in software based on specific conditions, and they should not be used for account-specific authorization checks.
  3. When transitioning to a new feature flag system, focusing on separating reads and writes can provide a smoother migration process and reduce the risk of errors or discrepancies between different systems.

The Macbook Pro (Mini LED) is an excellent laptop

Kartick’s Blog • 0 implied HN points • 22 Feb 23
🕹 Technology Performance
  1. The Macbook Pro with Mini LED screen displays HDR videos exceptionally well, with bright highlights and deep blacks, providing a realistic viewing experience.
  2. The 16:10.3 aspect ratio of the screen offers increased height, making the display feel spacious and immersive.
  3. The M1 Macbook Pro demonstrates superior responsiveness compared to Intel computers, opening apps instantly and setting a new standard in speed and performance.

Learn to Fly.io with AnyCable

AnyCable Broadcasts • 0 implied HN points • 06 Sep 22
🕹 Technology Performance
  1. The benchmark results showed that AnyCable (RPC-less) handled 2700 concurrent connections, consuming only half of the available RAM (~120MB).
  2. Fly.io deployment guide for AnyCable and Real-time stress: AnyCable, k6, WebSockets, and Yabeda are helpful resources for developers.
  3. Issues like getting an app's Ruby version from the Gemfile have been fixed in recent 'flyctl' versions, and termination of Redis connections is intentional according to Fly docs.

AnyCable v1.2: JWT identification and "hot streams"

AnyCable Broadcasts • 0 implied HN points • 29 Sep 21
🕹 Technology Performance
  1. AnyCable v1.2 introduces JWT identification and 'hot streams' for powering up efficient Hotwire frontends by moving functions from Ruby to Go.
  2. JWT identification standardizes authentication for WebSockets, protects from cross-site WebSocket hijacking, and boosts performance by removing the need for RPC calls.
  3. Combining JWT identification with signed streams in AnyCable allows the creation of subscriptions without touching RPC, offering improved efficiency for Hotwire and CableReady functionality.

An Optimistic Venture Prose

Venture Prose • 0 implied HN points • 22 Mar 18
💼 Business Performance
  1. Investors and entrepreneurs often engage in gossip and cliches, while true progress is being made by dedicated entrepreneurs focused on providing solutions to their clients.
  2. In the world of venture capital, reputation and performance are crucial, with one often influencing the other. It takes time and consistency to see the full picture of success or failure.
  3. When investing in startups, optimism is key, as the future is not merely an extension of the past. It's important to prioritize talent, strategy, and the entrepreneur's decisions over fear or euphoria.

System Call Tracing

Certo Modo • 0 implied HN points • 09 Jun 23
🕹 Technology Performance
  1. System calls are how programs interact with the operating system to request and manage resources like memory and files.
  2. System call tracing allows real-time observation of running processes to understand resource usage and behavior.
  3. Tracing tools like strace and perf can help diagnose issues in production systems but come with a performance impact, requiring caution in usage.

Release Notes — March 24th 2023

tldraw • 0 implied HN points • 24 Mar 23
🕹 Technology Performance
  1. Thousands of new translations were added to the app in various languages.
  2. Performance improvements were made for multiplayer projects by fixing a data hose issue.
  3. Various fixes were implemented such as alignment of shapes and preventing merging of space characters.

fullctx-highimpact-frontend-daily #2

Full Context Development • 0 implied HN points • 01 May 23
🕹 Technology Performance
  1. Understanding React rendering behavior can help improve performance by eliminating unnecessary renders and minimizing payload size.
  2. Eliminating flickering from React apps is important for providing a smooth user experience and can positively impact business results.
  3. Securing Next.js applications with HTTP headers and mitigating Cross Site Request Forgery is crucial for maintaining customer experience and productivity.

On Timepass and Tutankhamun's Transcendent Tunes (Ch. 11)

Ink-uilab • 0 implied HN points • 04 May 23
🎨 Art & Illustration Performance
  1. The newsletter delves into the concept of 'timepass' and discusses the speech given at the Yale College Henry James TenEyck Prize Competition on the topic.
  2. Philip Glass' opera Akhnaten is explored, highlighting its mystical and historical themes, including the use of ancient languages in the production.
  3. The newsletter also touches upon the work of Agha Shahid Ali and his contributions to New Formalism, particularly focusing on the 'English ghazal' poetry form.

Revenue is a Poor North Star Metric

TeamCraft • 0 implied HN points • 14 Aug 23
💼 Business Performance
  1. Revenue should not be the sole metric to focus on for growth
  2. It's important for companies to align on meaningful objectives through frameworks like OKRs
  3. Choosing the right North Star Metric can lead to more efficient growth and long-term success

Breaking the curse of LLM v2

ML Under the Hood • 0 implied HN points • 18 Jul 23
🕹 Technology Performance
  1. New releases of large language models focus on efficiency over quality
  2. Performance improvements in GPT-4 and other models may sacrifice quality in some tasks
  3. LLaMA v2 by Meta offers better quality and commercial use but comes with language limitations and user restrictions

Sino-Nashville Twang

Wu Fei's Music Daily • 0 implied HN points • 12 Jun 23
🎶 Music Performance
  1. The article "Sino-Nashville Twang" features an in-depth interview and review of Wu Fei's work.
  2. The article covers aspects that have not been discussed in Wu Fei's previous interviews.
  3. Upcoming concerts and projects, including performing with the Philadelphia Orchestra, are mentioned in the article.

The Huberman-ization of America

Digital Native • 0 implied HN points • 14 Feb 24
🏥 Health & Wellness Performance
  1. The Huberman-ization of America showcases the growing importance society places on health and wellness. Andrew Huberman's rise reflects a broader trend of people investing more in their bodies and minds.
  2. The shift towards health is evident in three main categories: Performance, Aesthetic, and Health. Each category is experiencing a surge in startups and innovation driven by consumer spending on personalized health solutions.
  3. GLP-1 agonists and health startups are addressing the obesity epidemic and driving significant changes in consumer habits and industries like airlines. Investment in health is increasing across different sectors, such as insurers, employers, and consumers.