What is faster? One intent.putExtras(Bundle with Strings) or many intent.putExtra(String)?
android, android-intent, bundle, performance
Solution
Creating `Bundle` on your own and then adding that to an intent should be faster.
According to the source code, `Intent.putExtra(String, String)` method looks like this:
public Intent putExtra(String name, String value) {
if (mExtras == null) {
mExtras = new Bundle();
}
mExtras.putString(name, value);
return this;
}
So, it will always check at first if `Bundle mExtras` was already created. That's why it's probably a bit slower with big sequence of String additions. `Intent.putExtras(Bundle)` looks like this:
public Intent putExtras(Bundle extras) {
if (mExtras == null) {
mExtras = new Bundle();
}
mExtras.putAll(extras);
return this;
}
So, it will check `if (mExtras == null)` only once and later add all the values to the internal `Bundle mExtras` with `Bundle.putAll()`:
public void putAll(Bundle map) {
unparcel();
map.unparcel();
mMap.putAll(map.mMap);
// fd state is now known if and only if both bundles already knew
mHasFds |= map.mHasFds;
mFdsKnown = mFdsKnown && map.mFdsKnown;
}
`Bundle` is backed up by a `Map` (`HashMap` to be precise), so adding all Strings at once to this map should be also faster than adding Strings one by one.
Problem
What is faster? Adding a bunch of string values to a `bundle` and then adding that to an `intent`? Or just adding the values to an `intent` using `intent.putExtra()`? Or doesn't it make much difference? A Google search gave me tutorials, but not much of an answer. Just asking out of curiosity, wondering if it would affect performance to use one or the other. This got close, but does not answer what I would like to know.