New roots, same Square
Exactly one year ago, after 12 years in San Francisco, I moved back to France. Life since has been a whirlwind: selling the condo, moving a container overseas, rediscovering French culture (I had to r
P-Y's blog
Latest articles
DIY: your own Dependency Injection library!
Demystifying the internals of DI libraries
ANR internals: touch dispatching through the view hierarchy
I'm writing a blog series on ANR internals, where I'll use ANRs as an excuse to learn more about how various parts of Android work. This first article is focused on touch dispatching through the view hierarchy. ANR triggers How is an "Application No...
A script to compare two Macrobenchmarks runs
In Statistically Rigorous Android Macrobenchmarks, I laid out a methodology for rigorously comparing the outcome of two Jetpack Macrobenchmark runs. To summarize the article: Remove sources of variations until the distribution fits a normal distribu...
Freezes & ANRs? Check memory leaks!
In this article, I show how Android memory leaks lead to jank, freezes and ANRs more often than they lead to OutOfMemoryError crashes. Navigation Latency At Square, we've been tracking a User-Centric performance metric: Interaction Latency. We track ...
Tracking Android App Launch in production
👋 In this article, I summarize my findings on Android app launch after a few years of deep dives, with the hope that these guidelines help implementations track app launches correctly. User-Centric App Launch analytics In User-Centric Mobile Perfor...
User-Centric Mobile Performance
👋 Hi, this is P-Y, over the last three years I've been steering Square's focus on mobile performance and building a framework for thinking about it and prioritizing work. In this article I share my approach, let me know what you think! Useful metri...