Pierre-Yves Ricau

@py

Deep dives

San FranciscoJoined July 2021

About

My pronouns are he / him. Android Engineer at Square in San Francisco. A few things I enjoy:

Publishing Open Source libraries (LeakCanary, Curtains, Radiography, square/logcat) Rollerblading Writing technical blogs (previously on dev.to/pyricau) Cooking Giving tech talks Reading sci-fi

Available for

tech talks, panels, bake offs, and rollerblades.

Pierre-Yves Ricau's blogs

P-Y's blogblog.p-y.wtf21 posts

Recently published

blog.p-y.wtf

Parallelism with Android SQLite

The SQLDelight documentation provides this example: val players: Flow<List<HockeyPlayer>> = playerQueries.selectAll() .asFlow() .mapToList(Dispatchers.IO) This looks reasonable, right? In the Square Point Of Sale application, we recently ...

Feb 5, 202511 min read

blog.p-y.wtf

Rendering the Java heap as a Treemap

Exploring heap dumps I have investigated many heap dumps over the years, and I usually switch back and forth between two tools: YourKit Java Profiler to poke around the heap and look for interesting things (ask your company to buy a license!) Shark...

Sep 25, 20249 min read

blog.p-y.wtf

Cutting some Slack, for leaks and giggles

In this article I run the new LeakCanary toolkit against the Slack Android app. Read on to learn a bunch! A new LeakCanary toolkit In two months, I will give a talk at Droidcon SF: Cutting Edges: universal heap trimming with LeakCanary 3 At Square, ...

May 7, 20245 min read

blog.p-y.wtf

A weirder HashMap

Today I was mob programming with Square's Mobile & Performance Reliability team and we toyed with an interesting idea. Our codebase has classes that represent screens a user can navigate to. These classes are defined in modules, and these modules hav...

Feb 15, 20245 min read

blog.p-y.wtf

DIY: your own Dependency Injection library!

Dependency Injection libraries are powerful tools, but they're often also intimidating & confusing. When that happens to me, I find that understanding how a tool works helps me get over the initial scare of the dark magic internals. In this article, ...

Jan 18, 202417 min read

Search Hashnode

Pierre-Yves Ricau

About

Available for

Pierre-Yves Ricau's blogs

Recently published

Parallelism with Android SQLite

Rendering the Java heap as a Treemap

Cutting some Slack, for leaks and giggles

A weirder HashMap

DIY: your own Dependency Injection library!