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Fennec/NativeUI/CodingStyle: Difference between revisions
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→Timing things
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TLDR: If you're adding stuff for timing, use android.os.SystemClock, rather than something like new Date().getTime(). | TLDR: If you're adding stuff for timing, use android.os.SystemClock, rather than something like new Date().getTime(). | ||
Normally in Java the default time-getter is System.currentTimeMillis() since it avoids the overhead of creating a new Date object. However, currentTimeMillis() | Normally in Java the default time-getter is System.currentTimeMillis() since it avoids the overhead of creating a new Date object. This is also what new Date() does under the hood. However, currentTimeMillis() and the Date object are both subject to change in unexpected ways if the user changes the time on their device, or if daylight savings comes into effect, or there's a network time update, or whatever. So Android has generously provided android.os.SystemClock which has various functions that you can use to get a better timestamp. Refer to the class javadoc and pick whichever function is most suitable for what you're trying to measure. | ||