Summary:
Benchmark to test changes from https://github.com/facebook/react-native/issues/49449
Might be nice to have some version of this in the repo.
## Changelog:
[INTERNAL] [ADDED] - Setup a Macrobenchmark for RNTester
Pull Request resolved: https://github.com/facebook/react-native/pull/49486
Test Plan:
### Methodology
Picked various JS file from websites (facebook, instagram) to artificially grow RN tester bundle somewhat realistically. The files are required lazily from a button press callback to simulate the code being included, but not executed, as it would be in a large app that uses lazy requires for the different screens.
I've also made the RN tester screens lazy so all their code is not loaded initially. This is more representative of real apps. Note this is implemented in a hacky way just for the purpose of this test. It would actually be nice to implement this properly.
The tests were made using low end device Samsung Galaxy A03s.
### Compression ON with 10.5 mb bundle
#### Peak allocated memory
60.9 mb
#### ReactInstance.loadJSBundler
148.64 ms
#### Benchmark
timeToFullDisplayMs min 1,825.0, median 1,911.1, max 1,994.8
timeToInitialDisplayMs min 834.9, median 860.9, max 903.9
#### APK
Size: 22.9 mb
Download size: 14.5 mb
### Compression OFF with 10.5 mb bundle
#### Peak allocated memory
51.5 mb
#### ReactInstance.loadJSBundler
946 us
#### Benchmark
timeToFullDisplayMs min 1,752.8, median 1,827.2, max 1,977.5
timeToInitialDisplayMs min 837.7, median 881.3, max 937.2
#### APK
Size: 28 mb
Download size: 14.5 mb
Reviewed By: rshest
Differential Revision: D70002286
Pulled By: cortinico
fbshipit-source-id: 436597f439ba244649373870c1facefdb12297d9
Janic Duplessis