Woowahan Brothers Improves Baedal Minjok WebView Loading Performance with critical-script (Real-User LCP Improved by 25–35%)

·2026.10.21 16:56

Key point

Parallelized API requests using inline scripts to improve WebView loading performance and applied it to approximately 80 pages.

Developed a critical-script bundler plugin to start API requests at the HTML parsing stage, parallelizing the loading waterfall
Store home WebView LCP improved by 37% from 1,340ms to 847ms in a specific test environment (Galaxy S22+, Wi-Fi), and real-user data showed a 25–35% improvement in p50–p90 LCP
Implemented as a Vite plugin to place inline script code next to the page and enable sharing of the main app module
Currently used across approximately 80 pages for API prefetch, LCP image preload, and FCP skeleton optimization, and open-sourced on GitHub

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