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Podkey WWDC 2026 · June 12 · 8 min

Power and Performance Group Lab

A Podkey summary of Power and Performance Group Lab, from WWDC 2026. A lot of this week’s developer news comes down to one theme: making performance work less guessy and a lot more visible. There are better tools for comparing instrument runs, clearer ways to read launch time, new MetricKit upgrades for Swift, and a bunch of practical advice for SwiftUI, background tasks, and even heat and battery limits in the real world. It’s the kind of update that doesn’t sound flashy at first, but if you’ve ever spent hours trying to figure out why an app feels a little off, this is the stuff that saves your week. Comparing runs without the window shuffle MetricKit gets a more natural Swift API Launch time gets faster for free, mostly What’s really slowing launch SwiftUI and the hidden cost of redrawing Environment churn and big lists State reporting makes metrics more useful Background work that cooperates with the system Testing for heat, battery, and older-device reality Benchmarking without over-optimizing This podcast was created with Podkey. Make your own at https://podkey.fm

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A Podkey summary of Power and Performance Group Lab, from WWDC 2026.

A lot of this week’s developer news comes down to one theme: making performance work less guessy and a lot more visible. There are better tools for comparing instrument runs, clearer ways to read launch time, new MetricKit upgrades for Swift, and a bunch of practical advice for SwiftUI, background tasks, and even heat and battery limits in the real world. It’s the kind of update that doesn’t sound flashy at first, but if you’ve ever spent hours trying to figure out why an app feels a little off, this is the stuff that saves your week.

  • Comparing runs without the window shuffle
  • MetricKit gets a more natural Swift API
  • Launch time gets faster for free, mostly
  • What’s really slowing launch
  • SwiftUI and the hidden cost of redrawing
  • Environment churn and big lists
  • State reporting makes metrics more useful
  • Background work that cooperates with the system
  • Testing for heat, battery, and older-device reality
  • Benchmarking without over-optimizing

This podcast was created with Podkey. Make your own at https://podkey.fm

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