9: Android Bytecode Optimisation with Emma

Jan 17, 2019

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 [e-mail].

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