Pedal to the Metal - Aftermath

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Pedal to the Metal Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Pedal to the Metal - AFTERMATH Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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! Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Sequel Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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⾠ Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Context Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Planning @ SoundCloud Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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the bet Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Improve iOS launch time Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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iOS branch Core Clients Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Impossibility Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Check the code 1. Grab start timestamp 2. Grab end timestamp 3. Diﬀ 4. Multiply by a 1000 5. Send Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Check the code 1. Grab start timestamp 2. Grab end timestamp 3. Diﬀ 4. Multiply by a 1000 5. Send Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Over 5 seconds Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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7,000,000 milliseconds Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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context Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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App then Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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App now Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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more context Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Instruments Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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1. Startup Operations 2. ViewController 4. Profit?? Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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! Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Main thread Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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! Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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! Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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How about that ViewController Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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even more context Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Mirroring & you Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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⚡" Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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What now !? Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Total pre-main time: 2.0 seconds (100.0%) dylib loading time: 355.67 milliseconds (17.0%) rebase/binding time: 1.3 seconds (63.5%) ObjC setup time: 186.10 milliseconds (8.9%) initializer time: 218.53 milliseconds (10.4%) slowest intializers : libSystem.dylib : 5.52 milliseconds (0.2%) : 51.01 milliseconds (2.4%) MediaServices : 57.60 milliseconds (2.7%) SoundCloud : 182.43 milliseconds (8.7%) Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Enter Static Frameworks Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Total pre-main time: 563.45 milliseconds (100.0%) dylib loading time: 111.39 milliseconds (19.7%) rebase/binding time: 151.48 milliseconds (26.8%) ObjC setup time: 148.33 milliseconds (26.3%) initializer time: 152.08 milliseconds (26.9%) slowest intializers : libSystem.dylib : 3.37 milliseconds (0.5%) : 46.06 milliseconds (8.1%) MediaServices : 25.92 milliseconds (4.6%) SoundCloud : 148.34 milliseconds (26.3%) Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Resources & Static Frameworks Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Including Frameworks Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Takeaways Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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1. Parallelize* * Also with care Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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2. Instruments is your friend Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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3. Static Frameworks* * Also with care Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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4. Assume no ill-intention Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Links · Automatic's blogpost about static frameworks 1 · Keith Smiley's LD python script 2 · CocoaPods 1.5.0 release notes 3 3 http://blog.cocoapods.org/CocoaPods-1.5.0/ 2 https://github.com/keith/swi"-staticlibs 1 https://blog.automatic.com/how-we-cut-our-ios-apps-launch-time-in-half-with-this-one-cool-trick-7aca2011e2ea Esteban Torres • Core Clients @ SoundCloud • @esttorhe

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Xiè xiè · Github / Twitter @esttorhe - Mastodon @[email protected] Esteban Torres • Core Clients @ SoundCloud • @esttorhe