Speed Index  | Lighthouse  | Chrome for Developers
Speed Index is one of five metrics tracked in the Performance section of the Lighthouse report. Each metric captures some aspect of page load speed. Lighthouse displays Speed Index in seconds: Speed Index is one of five metrics tracked in the Performance section of the Lighthouse report What Speed Index measures Speed Index measures how quickly content is visually displayed during page load. Light
Announcing Rome Formatter
Illustration by <a href="https://tomavagner.com" target="_blank">Toma Vagner</a>Announcing Rome Formatter We began a full rewrite of Rome in Rust last year, and we’re excited to announce our first release as a part of this effort with the Rome Formatter, a new formatter for JavaScript and TypeScript. It perfectly expresses our goals of excellent performance, ease-of-use, and first-class IDE integr
Load testing for engineering teams | Grafana k6
The best developer experience for load testingOpen source and SaaS for engineering teams Prevent failures. Improve reliability. Release with confidence.Test early and continuously—break the QA silo in performance testing DevelopersBackend and frontend engineers prevent regressions when running performance tests. Site Reliability EngineersTest scalability to improve your reliability targets. Test S
GitHub - grafana/k6: A modern load testing tool, using Go and JavaScript - https://k6.io
Modern load testing for developers and testers in the DevOps era. Download · Documentation · Community Forum · Public Roadmap k6 is a modern load-testing tool, built on our years of experience in the performance and testing industries. It's built to be powerful, extensible, and full-featured. The key design goal is to provide the best developer experience. Its core features are: Configurable load
4 Non-standard Ways to Fix N+1 Queries in Rails
4 Non-standard Ways to Fix N+1 SQL Queries in Rails Updated Apr 6, 2021 6 minute read I’m not sure if the world needed another post about N+1 queries in Ruby on Rails. To make up for the cliche topic, I’ll describe less common solutions to this problem. Read on if you want to learn how to reduce the number of cascading N+1 SQL queries without using includes or additional table join operations. N+1
Amazon Athena ã®ãƒ‘フォーマンスãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚° Tips トップ 10 | Amazon Web Services
Amazon Web Services ブãƒã‚° Amazon Athena ã®ãƒ‘フォーマンスãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚° Tips トップ 10 2024 å¹´ 2 月ã«æ›´æ–°ã•ã‚ŒãŸåŽŸæ–‡ã‚’日本語版ã¨ã—㦠9 月ã«åæ˜ ã—ã¾ã—ãŸï¼š ã“ã®è¨˜äº‹ã¯ã€ã‚³ã‚¹ãƒˆãƒ™ãƒ¼ã‚¹ã®æœ€é©åŒ–ã¨ã‚¯ã‚¨ãƒªçµæžœã®å†åˆ©ç”¨ã‚’å«ã‚€ Amazon Athena エンジンãƒãƒ¼ã‚¸ãƒ§ãƒ³ 3 ã®å¤‰æ›´ã‚’åæ˜ ã™ã‚‹ãŸã‚ã«ç¢ºèªãŠã‚ˆã³æ›´æ–°ã•ã‚Œã¾ã—ãŸã€‚ Amazon Athena ã¯ã€ã‚ªãƒ¼ãƒ—ンソースã®ãƒ•ãƒ¬ãƒ¼ãƒ ワークã«åŸºã¥ã„ãŸå¯¾è©±åž‹åˆ†æžã‚µãƒ¼ãƒ“スã§ã€æ¨™æº–ã® SQL を使ã£ã¦ Amazon Simple Storage Service (Amazon S3) ã«æ ¼ç´ã•ã‚ŒãŸã‚ªãƒ¼ãƒ—ンテーブルãŠã‚ˆã³ãƒ•ã‚¡ã‚¤ãƒ«å½¢å¼ã®ãƒ‡ãƒ¼ã‚¿ã‚’ç°¡å˜ã«åˆ†æžã§ãã¾ã™ã€‚Athena ã¯ã‚µãƒ¼ãƒãƒ¼ãƒ¬ã‚¹ãªã®ã§ã€ã‚¤ãƒ³ãƒ•ãƒ©ã‚¹ãƒˆãƒ©ã‚¯ãƒãƒ£ã®ç®¡ç†ã¯ä¸è¦ã§ã€å®Ÿè¡Œã—ãŸã‚¯ã‚¨ãƒªã«å¯¾ã—ã¦ã®ã¿æ–™é‡‘を支払ã„ã¾ã™ã€‚Athena ã¯ä½¿ã„ã‚„ã™ãã€Ama
Native image lazy-loading for the web!
April 6, 2019 In this post, we’ll look at the new loading attribute which brings native <img> and <iframe> lazy-loading to the web!. For the curious, here’s a sneak preview of it in action: <img src="celebration.jpg" loading="lazy" alt="..." /> <iframe src="video-player.html" loading="lazy"></iframe> We are hoping to ship support for loading in ~Chrome 75 and are working on a deep-dive of the feat
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調ã¹ã”ã¨ã‚’ã—ãŸã®ã§ blog ã«æ›¸ã„ã¦ç†è§£ã‚’æ·±ã‚よã†ã®ã‚³ãƒ¼ãƒŠãƒ¼ã§ã™ã€‚é•·æ–‡ã§ã™ã€‚ Linux ã§ã‚·ã‚¹ãƒ†ãƒ è² è·ã‚’è¦‹ã‚‹å ´åˆã«ãŠä¸–話ã«ãªã‚‹ã®ãŒ top ã‚„ sar (sysstat パッケージã«åŒæ¢±ã•ã‚Œã¦ã‚‹ã‚³ãƒžãƒ³ãƒ‰) ãªã©ã®ãƒ„ールã§ã™ã€‚ top ã§ã¯ã‚·ã‚¹ãƒ†ãƒ 統計ã®ã‚¹ãƒŠãƒƒãƒ—ショットを見るã“ã¨ãŒã§ãã¾ã™ã€‚今システムãŒã©ã†ã„ã†çŠ¶æ…‹ã‹ãªãƒ¼ã¨ã„ã†ã¨ã㯠top ãŒä¾¿åˆ©ã€‚ top - 08:16:54 up 3 days, 14:43, 6 users, load average: 0.18, 0.07, 0.03 Tasks: 43 total, 2 running, 41 sleeping, 0 stopped, 0 zombie Cpu(s): 18.2% us, 0.0% sy, 0.0% ni, 81.8% id, 0.0% wa, 0.0% hi, 0.0% si一方㮠sar ã§ã¯10分ã”ã¨ã®ã‚·
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GitHub - test-prof/test-prof: Ruby Tests Profiling Toolbox
PageSpeed Insights
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