Optimise custom map rendering - Githubissues

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Optimise custom map rendering #11000

Open barnabwhy opened 2 days ago

barnabwhy commented 2 days ago

Remove floating point math from getDistance in org.bukkit.map.MapPallete
Use bitwise & for bounds checks in obc.map.CraftMapCanvas to reduce comparisons
Reduce size of image being drawn in drawImage if it is larger than the available size.
Use System.arraycopy to avoid iterating over the colors in the image.

Saw a ~30% performance improvement in obc.map.CraftMapView.render()

Tested with a world containing many custom maps created using the ImageOnMap plugin, modified to remove this optimisation so that it renders every tick. Before: https://spark.lucko.me/NVdWKmSlFr After: https://spark.lucko.me/j6AJiFG9pD