Marker share icon image#2741
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christopherdro merged 2 commits intoreact-native-maps:masterfrom Apr 12, 2019
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@zupaox that's awesome ❤️ LGTM @alveig @christopherdro 🐽 |
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hey @rborn, I think iOS will use cached UIImage (loadImageWithURLRequest, RCImageCache), so it will not have the issue. We don't have iOS app crash reports because of memory issue as well. |
Use a shared image icon for markers instead of loading and creating bitmap for each marker, which uses more memory in case when we have a lot of markers but only use a limited set of images.
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* Add a test example to add massive number of markers on map * Share image for markers to reduce memory usage Use a shared image icon for markers instead of loading and creating bitmap for each marker, which uses more memory in case when we have a lot of markers but only use a limited set of images.
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Does any other open PR do the same thing?
Looks No.
What issue is this PR fixing?
Android app's memory usage climbs high when there are thousands of markers on the map, even though most of the markers uses same image and the images are only around 1KB.
This update is to use a shared image icon for markers when they share the same image URI, instead of loading and creating bitmap within each marker, which uses more memory in case we have a lot of them.
How did you test this PR?
Ideally you should test it with an app that contains a lot of custom markers that shared a small image pool.
To make it simple, we have also created a new page in example app, named "MassiveCustomMarker", which will place 100 custom markers on tap on the map. You can check it out and run the example app. Open android studio profile and watch the memory usage before and after the update while placing more markers on the map.
As a reference, following is the memory profile before the update, tested on Samsung J2 (Samsung SM-G532G). The app crashed on about 500 markers:
Following is the memory profile after the update, Java memory consumption alomost remains constant regardless of the number of markers added. App does not crash even after 1000 markers.