Explore 10 articles from Duolingo on mobile performance
Showing 10 of 10 articles (Page 1 of 1)
Duolingo's iOS team turned a boilerplate problem into a Swift Macros showcase. Their codebase grew, but developer friction didn't have to.
Duolingo ships weekly to 40M+ daily active users across 176 countries. Their secret weapon for speed? Kotlin Multiplatform.
Chenglai Huang and Michael Huang from Duolingo reveal how 39% of entry-level Android users were abandoning their app before it even loaded. Their fix? A masterclass in performance optimization that saved hundre...
Duolingo's Android team cut startup time by 30% with baseline profiles. But the path from 'easy setup' to production was anything but smooth.
Duolingo's QA team cut manual regression testing by 70% using AI. Here's how they made it work at scale.
Duolingo's engineers were stuck waiting 50 minutes for every CI build. That's hundreds of hours wasted every week across the team.
Duolingo ships UI changes in minutes, not weeks. Their server-driven UI system bypasses app store releases entirely.
Duolingo catches critical bugs before users ever see them. Their secret? 70% of employees actively use internal builds daily.
Duolingo's Android app was degrading 5-10% every month. New features meant guaranteed performance regressions every 90 days.
Duolingo shipped their first Swift app in 2015 and achieved a 0.2% crash rate. Here's what they learned building a high-stakes testing app where crashes cost users real money.