In this episode, Pascal and Mihaela chat with Emma about Redex, an open-source bytecode optimiser for Android apps. Emma talks about the importance and trade-offs of such optimisations and walks us through the basic steps of how Redex works and the different types of detection patterns it uses. If you are interested in trying Redex for yourself or curious to know how it's different than other similar tools, Emma discusses how to adopt Redex in your app and how to write your own detection pattern.

For feedback, please reach out on Twitter at @insidefbmobile or drop us an email at [email protected].

Topics discussed

• Redex: https://fbredex.com/
• Sparta: https://github.com/facebook/redex/tree/master/sparta
• Proguard: https://www.guardsquare.com/en/products/proguard
• Facebook Open Source year-in-review: https://code.fb.com/open-source/open-source-2018/
• Spectrum: https://github.com/facebookincubator/spectrum
• Droidcon SF Talk about Spectrum: https://www.youtube.com/watch?v=Lb5H6_vCEok
• Mozjpeg: https://github.com/mozilla/mozjpeg/
• PyTorch: https://pytorch.org/
• Github 2018 review: https://octoverse.github.com/projects
• PyTorch 1.0: https://code.fb.com/ai-research/pytorch-developer-ecosystem-expands-1-0-stable-release/

Time Codes

Intro 0:00.000 PyTorch 1.0 0:39.728 FB Open Source Year in Review 1:20.000 Spectrum 2:06.708 Retiring Nuclide 2:51.525 Recent Litho Changes 3:38.753 Recent Flipper Changes 5:09.199 Emma Intro 6:49.595 What's Redex? 12:16.341 Optimization Passes 16:02.753 Tradeoffs 27:38.198 Open Source 31:52.276 Pattern Match Optimizations 33:28.602 Contributing to Redex 36:56.130 Removing Cats and Good Bye 38:06.425 Outro 38:25.360 Bloopers 41:44.451