Power 
Internally, Tasker does its best to keep power usage down. Following are some macro-strategies to achieve this.
Context Monitoring
When a profile contains multiple contexts, power is saved by only monitoring for changes in order of the least-power-hungry first. For example, in a profile with a Time and App context, Tasker will not decide that it needs to monitor for a changing application unless the Time context is active (because the profile cannot become active until both contexts are active).
Tasker rates contexts for power-hungriness in the following (ascending) order:
- Other State
- Day / Time
- Calendar Entry State
- Cell Near State
- App
- Network Location
- Wifi Near State
- GPS Location
- Proximity Sensor / Gesture Event / Orientation State (accelerometer activation)
Items at the bottom of the list won't become eligible for monitoring until all items further up the list are active.
Display-Off Checks
When the display is off, all necessary 'active' checks (GPS/Net Location, Wifi Near, App) are done at the same time so that the device is awake for as short a time as possible. See Display Off Timings in Menu / Prefs / Monitor for the frequency and maximum duration of these checks.
