“Green” development: is it even a thing?
summary
Claim: app inefficiency creates measurable CO2 impact. Measurements use Xcode 11 Instruments and MetricKit plus live metrics and debugger energy traces. A worst‑case iPhone drains ~5.5 kWh/year (~4.4 kg CO2 using 0.8 kg/kWh); multiplied by ~900 million devices becomes a large emissions pool. Concrete fixes: batch and throttle CPU work, minimize network transfers (discretionary URLSession), reduce animation and sensor sampling, respect Low Data Mode, honor thermalState notifications and complete background tasks. The tools show where savings actually occur.
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chapters (11)
- 0:00Intro
- 0:31Green development is a real estate development concept that carefully considers social and environmental impacts of development.
- 2:56YOU NEED TO CHARGE YOUR IPHONE?
- 6:30UNDERSTAND HOW ENEGRY IS USED ON THE IPHONE
- 7:18DEVICE WAKE
- 8:09NETWORKING OPERATIONS
- 15:30MONITOR ENERGY USAGE IN THE DEBUGGER
- 16:05XCODE INSTRUMENTS FOR OPTIMISATION
- 17:34ADOPT LOW DATA MODE
- 19:01UNDERSTANDING DEVICE CONTIDIONS
- 23:35WITH GREAT POWER COMES GREAT RESPONSIBILITY
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