WebPerfViet

Blog chia sẻ kiến thức về Web Performance

[WebPerfViet @WebPerfViet]

Web Workers move heavy JavaScript tasks off the main thread, helping websites stay smooth and responsive.

Better performance, better INP.

Read here:
https://t.co/oGp6nvnlCO
#WebWorkers #JavaScript #WebPerformance #INP

[WebPerfViet @WebPerfViet]

Lighthouse helps developers measure performance, accessibility, SEO, and Core Web Vitals to build faster websites.

A must-have tool for modern web optimization.

Read here:
https://t.co/qwmIhhudvA
#Lighthouse #WebPerformance #CoreWebVitals #WebDev

[WebPerfViet @WebPerfViet]

CSS Containment helps browsers isolate rendering work, reducing unnecessary layout and paint calculations for faster pages.

Better rendering efficiency = smoother UX.

Read here:
https://t.co/A5yGq4Ll0f
#CSS #WebPerformance #Frontend #WebDev

[WebPerfViet @WebPerfViet]

Long Tasks block the main thread, delay interactions, and hurt INP.

Less blocking = faster, smoother UX.

Read here:
https://t.co/j9Iiqr5kAI
#LongTasks #INP #WebPerformance #CoreWebVitals

[WebPerfViet @WebPerfViet]

Google PageSpeed Insights helps you measure Core Web Vitals, find performance issues, and improve website speed for better UX and SEO.

Faster pages = better rankings.

Read here:
https://t.co/SyVXlQYWIc
#PageSpeedInsights #CoreWebVitals #WebPerformance #SEO

[WebPerfViet @WebPerfViet]

Google Fonts can improve design—but too many fonts can hurt speed, LCP, and CLS.

Fewer requests, faster pages, better UX.

Read here:
https://t.co/fVckLd7WkT
#GoogleFonts #WebPerformance #CoreWebVitals #WebDev

[WebPerfViet @WebPerfViet]

Code Splitting loads only the JavaScript users need first, making websites faster and improving Core Web Vitals.

Smaller bundles = better performance.

Read here:
https://t.co/2ZKDCD6jwN
#CodeSplitting #WebPerformance #WebDev #CoreWebVitals

[WebPerfViet @WebPerfViet]

Critical CSS helps browsers render above-the-fold content faster by removing render-blocking CSS delays. Faster FCP, better LCP, smoother UX.

Read here:
https://t.co/5osOVVp7bl
#CriticalCSS #WebPerformance #CoreWebVitals #WebDev

[WebPerfViet @WebPerfViet]

Service Workers make websites faster and available offline with smart caching.

They power PWAs, offline mode, and better repeat visits.

Read here:
https://t.co/T3OAHA62QI
#ServiceWorker #PWA #WebPerformance #WebDev

[WebPerfViet @WebPerfViet]

HTTP/2 made websites faster with multiplexing, header compression, and better connection efficiency.

But how does it compare with HTTP/1.1 and HTTP/3?

Read here:
https://t.co/FIIjSMj6hF
#HTTP2 #WebPerformance #WebDev #CoreWebVitals

[WebPerfViet @WebPerfViet]

HSTS forces browsers to use HTTPS automatically and helps prevent downgrade attacks.

A small header, big security impact.

Read more:
https://t.co/ocRDj8iEnY
#HSTS #HTTPS #WebSecurity #WebDev

[WebPerfViet @WebPerfViet]

Gzip or Brotli — which compression wins for web performance?

I compared compression ratio, CPU cost, browser support, and real-world use cases for modern websites.

If you're optimizing Core Web Vitals, this matters.

Read here: https://t.co/2woVemU4aL

#WebPerformance #SEO

[WebPerfViet @WebPerfViet]

⚡ JavaScript async vs defer

A small <script> attribute can make a big difference in page speed and Core Web Vitals.

Read here: https://t.co/icsy1zhp0x
#JavaScript #WebPerformance #CoreWebVitals #PageSpeed #Frontend #WebDev #SEO

[WebPerfViet @WebPerfViet]

Image optimization matters ⚡ Heavy images slow down your site, hurt Core Web Vitals, and impact SEO. Read here: https://t.co/FKbBr6j8yv #WebPerformance #SEO #CoreWebVitals #Frontend #WebDev #PageSpeed

[WebPerfViet @WebPerfViet]

⚡ Slow website?

Caching may be the reason.

It helps pages load faster, reduces server load, improves Core Web Vitals, and boosts SEO.

Read more:
🔗 https://t.co/86leqiF2hH
#WebPerformance #Caching #SEO #CoreWebVitals

[WebPerfViet @WebPerfViet]

⏱️ LCP là gì?

Largest Contentful Paint = thời gian hình ảnh
lớn nhất hiển thị.

Google chuẩn: ≤ 2.5s là tốt.

Cách cải thiện LCP:
1️⃣ Nén hình ảnh → WebP
2️⃣ Lazy load không dùng ngay
3️⃣ Minify CSS/JS
4️⃣ Dùng CDN

Hướng dẫn chi tiết: https://t.co/3aOplha1cD

#SEO

[WebPerfViet @WebPerfViet]

🚀 Core Web Vitals 2025 — Google chuyển đổi
metrics để đo trải nghiệm người dùng tốt hơn.

INP thay thế FID, LCP & CLS vẫn là chỉ số quan trọng.

Bạn đã biết 5 chỉ số này ảnh hưởng
ranking & UX thế nào chưa?

Đọc ngay: https://t.co/BxloSEBAcJ

#SEO