Lazy initialisation JodaTimeAndroid.init(context)

[Bao Le Duc]

Calling JodaTimeAndroid.init(context) takes 50-300ms to complete depending on devices. Putting this initialisation on Android's Application class will increase cold start up time (https://developer.android.com/topic/performance/vitals/launch-time#cold). As Play store considers it's a nice metric to improve user experience and (may be app store ranking). Is there any way to "lazy" initialise it and speed up app's start time?

[Daniel Lew]

It would be possible to delay reading the zone data until first requested. Namely, in https://github.com/dlew/joda-time-android/blob/master/library/src/main/java/net/danlew/android/joda/ResourceZoneInfoProvider.java you could delay iZoneInfoMap = loadZoneInfoMap(openResource("ZoneInfoMap")) until absolutely necessary.

I'm a bit hesitant to make that change, though, just because it means you'd be adding execution time to some other random part of the app - changing behavior characteristics.

Within your own code, if you know you're not using DateTime until some time way after startup, you could delay calling JodaTimeAndroid.init() until then.

[Bao Le Duc]

Thanks for clarification. It's better to move the init() call just before the app is actually needed Joda.