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Sulagna Ghosh

Sulagna Ghosh

Sulagna Ghosh is a Solutions Engineer at Creowis and the lead organiser of React Kolkata, a community she grew to 1,500+ members in under eight months. She has spoken at JSNation 2025, React India 2025, GDG Devfest Kolkata, GDG Kolkata Build with AI 2025 and more events, each talk built around a browser primitive React developers overlook and the architectural problem it quietly solves. She is recognised for her contributions to the Kolkata and Indian tech ecosystem by GDG India Women in Tech 2026.
CreoWis, India, KolkataG38Suzysuzy-g38sulagna-ghosh-7955361a7sulagnaghosh.bsky.social
Interests:
reactperformancereact querytestingnext.jsbest practicesadvancedjamstackheadlesstypescriptdesign systemsreact componentscore web vitalsjavascriptstate managementnode.jscode qualityweb componentsdevtoolsweb developmentmicroservicesreact hooksfullstackssrframeworkscypressmicro-frontendsdatabasegraphqlawscss-in-jsuser interfaceswebpackfrontendmonoreposbackendpatternsreact 18mongodbtypescript librariesopen-source
JavaScript Isn’t Slow – It’s Just Scheduled Wrong
JSNation 2025JSNation 2025
14 min
JavaScript Isn’t Slow – It’s Just Scheduled Wrong
In this session, we’ll explore why JavaScript’s single-threaded model causes UI lag, why setTimeout() and requestIdleCallback() fail at task prioritization, and how scheduler.postTask() finally gives developers fine-grained control over execution.Through real-world examples, performance analysis, and a live demo, we’ll show how prioritized scheduling can eliminate UI freezes, improve responsiveness, and make JavaScript execution truly user-centric. If you care about JavaScript performance, this is the talk you don’t want to miss! 🚀
performance