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BNবাংলা#JavaScript performance
JavaScript performance is about how scripts affect loading, responsiveness and battery use on real devices. Articles tagged here explain render-blocking scripts, unused code, long tasks and third-party tags. They show how to use defer, async and code splitting safely. You will learn how to find which script is responsible for a slow page. Each guide focuses on changes that make pages respond faster to taps and clicks. These fixes matter most on mid-range phones.
5 set 2026 · 8 min di letturaPreload, Preconnect and Prefetch: Resource Hints Explained
Resource hints tell the browser what it will need before it finds out. Learn when to use preload, preconnect, dns-prefetch and prefetch, and when…
4 set 2026 · 7 min di letturaHow to Embed Videos Without Slowing Down Your Website
Embedded video players and background videos can add megabytes and heavy scripts. Learn how to use facades, lazy loading and lighter formats to keep…
30 ago 2026 · 8 min di letturaHow to Find Which WordPress Plugin Is Slowing Your Site
One heavy plugin can slow every page. Learn how to find it with profiling tools, the network panel and safe staging tests, and what…
21 ago 2026 · 8 min di letturaHow Third-Party Scripts Slow Down Your Website (and Fixes)
Chat widgets, pixels, tag managers and embeds can outweigh your own code. Learn how to audit third-party scripts, measure their cost and load them…
20 ago 2026 · 7 min di letturaDefer vs Async: How to Load JavaScript Without Slowing Pages
Defer and async both stop scripts from blocking the page, but run code at different times. Learn the difference, when to use each and…
19 ago 2026 · 8 min di letturaHow to Reduce Unused JavaScript and Speed Up Your Pages
Unused JavaScript costs download and processing time on every visit. Learn how to measure it, find its source and remove or delay it without…
18 ago 2026 · 8 min di letturaHow to Eliminate Render-Blocking Resources on Your Website
Render-blocking CSS and JavaScript keep the screen blank while files download. Learn how to find them, which to defer, which to inline and how…
5 ago 2026 · 7 min di letturaInteraction to Next Paint (INP): How to Fix Slow Interactions
INP measures how fast your page reacts to taps and clicks. Learn what causes poor INP, how to find the slow interaction and which…