2025-12-14 Tech Briefing | System design overview covering databases, message queues, and network protocols

Sunday

Welcome to this edition, featuring 9 articles.

📚 Contents/📝 TL;DR

📚 Contents

📝 TL;DR

Primary

Database Types You Should Know in 2025

System design overview covering databases, message queues, and network protocols

Database Types You Should Know in 2025

System design overview covering databases, message queues, and network protocols

A Detailed Explanation and Practice of JavaScript Streaming Output Technology

A detailed explanation of JS streaming output technology and practice

A Detailed Explanation and Practice of JavaScript Streaming Output Technology

A detailed explanation of JS streaming output technology and practice

Pulse: Will Major Tech Companies Fully Return to the 5-Day Office Work Model?

Meta's Instagram announces a full return to the 5-day office work model

Pulse: Will Major Tech Companies Fully Return to the 5-Day Office Work Model?

Meta's Instagram announces a full return to the 5-day office work model

TypeScript Minimal Tutorial, Rapid Onboarding!

A concise overview of TypeScript's core syntax and concepts for quick onboarding.

TypeScript Minimal Tutorial, Rapid Onboarding!

A concise overview of TypeScript's core syntax and concepts for quick onboarding.

December 13, 2025

Global headlines summary, covering AI regulation, space launches, macroeconomics, and international relations.

December 13, 2025

Global headlines summary, covering AI regulation, space launches, macroeconomics, and international relations.

Essential

JS Memory Black Holes: A Practical Guide to Avoiding Pitfalls from the Ground Up

A practical guide to avoid JS memory pitfalls, revealing the underlying logic of JS memory mechanisms.

JS Memory Black Holes: A Practical Guide to Avoiding Pitfalls from the Ground Up

A practical guide to avoid JS memory pitfalls, revealing the underlying logic of JS memory mechanisms.

General

🔥🔥 New Chrome Version Blocks Local Network Requests Due to Cross-Origin Restrictions

Chrome 138 update causes cross-origin issues with local network requests; permission adjustments are needed.

🔥🔥 New Chrome Version Blocks Local Network Requests Due to Cross-Origin Restrictions

Chrome 138 update causes cross-origin issues with local network requests; permission adjustments are needed.

The 193rd Episode: New Era of Empire

Podcast interpreting geopolitical events and open source happenings

The 193rd Episode: New Era of Empire

Podcast interpreting geopolitical events and open source happenings

Shallow Copy vs Deep Copy: Cloning a Hachimi

Explanation and implementation of shallow and deep copy concepts in JS.

Shallow Copy vs Deep Copy: Cloning a Hachimi

Explanation and implementation of shallow and deep copy concepts in JS.

Primary

Database Types You Should Know in 2025

ByteByteGo•Published on December 13

Insight•Software Architecture and Engineering Practices•Score: 8/10

DatabaseSystem DesignKafkaHTTPDNS

Source

◆

A Detailed Explanation and Practice of JavaScript Streaming Output Technology

Juejin Frontend Hottest•Published on December 6

Insight•Frontend Development•Score: 8/10

Streaming OutputSSEWebSocketFetch APIReadableStream

📈

Perspectives

Streaming output has evolved from a 'luxury feature' to a necessity in the current market environment (December 2025). With the proliferation of AI large models and real-time data analysis, user demand for instant feedback and low-latency experiences is increasing. Those who better leverage streaming technology can establish a competitive advantage in user experience. Many SaaS products, AI assistants, and real-time monitoring platforms in China are actively adopting this technology. Companies that remain in the request-response model will increasingly suffer in user experience and may even be eliminated by the market. In terms of technology selection, SSE is simple and efficient for one-way notifications; WebSocket is ideal for real-time collaboration and chat; and Fetch + ReadableStream offers unparalleled control in specific scenarios, making it a tool for advanced developers. So, don't treat streaming output as a niche technology anymore—learn it quickly, or you'll be left behind.

Source

◆

Pulse: Will Major Tech Companies Fully Return to the 5-Day Office Work Model?

Pragmatic Engineer•Published on December 13

News•Comprehensive News•Score: 7/10

Remote WorkRTOBig TechWork ModelTalent Management

Source

◆

TypeScript Minimal Tutorial, Rapid Onboarding!

Juejin Frontend Hottest•Published on December 7

Insight•Frontend Development•Score: 7/10

TypeScriptType SystemGenericsinferIntersection Types

Source

◆

December 13, 2025

Global Vision•Published on December 13

News•Comprehensive News•Score: 7/10

AI RegulationSatellite InternetMacroeconomicsInternational SituationSpace Launch

🔬

Tech Insights

From the perspective of an architect or product director, several points are notable: - AI Regulation: President Trump signed an executive order to restrict state-level AI regulation, aiming to establish a unified framework at the federal level to maintain U.S. AI leadership. This reflects the United States' 'National Strategy' in the AI field, preventing states from acting independently and slowing down overall development. However, it may also lead to power struggles between local governments and the federal government. - Space Launches: China's Long March 12 and Force-1 rockets have launched satellites in a short period, advancing the 'National Grid Constellation' and commercial space initiatives. This indicates strong national investment and execution capability in the field of low Earth orbit satellite internet and commercial space, which will have a profound impact on future communication infrastructure and data services.

📈

Perspectives

From a market perspective, the federalization trend of AI Regulation implies that future competition in the AI industry will focus more on technological strength and international standard-setting, rather than on seeking policy advantages across different states. For domestic tech companies, this is both a challenge and an opportunity, especially when going global and engaging in international cooperation, where they need to pay attention to a unified global regulatory framework earlier. Meanwhile, China's accelerated deployment in the field of satellite internet signals that the low Earth orbit satellite communications market will enter a highly competitive phase, not only in technology but also in cost and scale, bringing a 'disruptive impact' to ground communication and IoT industries. The Federal Reserve's continued rate cuts, although possibly less than Trump's expectations, will undoubtedly provide global liquidity relief, improving the financing environment for high-tech enterprises, particularly in the AI and aerospace sectors. However, it may also contribute to asset bubbles.

Source

Essential

JS Memory Black Holes: A Practical Guide to Avoiding Pitfalls from the Ground Up

Juejin Frontend Hottest•Published on December 11

Insight•Frontend Development•Score: 8/10

JS Memory ManagementMemory LeaksV8 EngineWeakMapWebWorker

Source

General

🔥🔥 New Chrome Version Blocks Local Network Requests Due to Cross-Origin Restrictions

Juejin Frontend Hottest•Published on December 8

Insight•Frontend Development•Score: 6/10

ChromeCross-OriginLocal Network AccessFrontend DebuggingCSRF

Source

◆

The 193rd Episode: New Era of Empire

Post-Internet Talk•Published on December 13

News•Comprehensive News•Score: 5/10

GeopoliticsOpen SourceNational SecurityPodcast

Source

◆

Shallow Copy vs Deep Copy: Cloning a Hachimi

Juejin Frontend Hottest•Published on December 8

Insight•Frontend Development•Score: 5/10

Shallow CopyDeep CopyJavaScriptReference TypesstructuredClone