generating 1 large bounded random costs the same as generating 4 small ones, so it makes more sense to do it like this instead.
Note that prior to 7.1 this code would not work due to it not handling 64-bit appropriately.
Blocks were being overwritten in the writebatch which hadn't yet been set, so reading them from the world yielded air blocks instead of trunk, allowing the generation to overwrite blocks which should have been logs.
This prevents plugins sending wrong packets at the compiler level (or would, if we had a compiler). It's more robust than a getter for client/server and throwing an exception since a static analysis tool can detect faults created by sending wrong packets from the server. This is also used to deny service to dodgy clients which send wrong packets to the server to attack it.
this is in preparation for clientbound/serverbound packet separation. I did this already on another branch, but the changeset was dependent on a massive refactor to split apart packets and binarystream which i'm still not fully happy with.
this has been a bug for a long long time. I think the reason it was never addressed is because of the performance impact associated with it. However, that performance impact is now gone thanks to light update batching.
this allows deduplicating block updates when lots of adjacent blocks are set on a tick, which has beneficial effects on performance. It also fixes#2659.
Future scope:
- Use this mechanism to deal with explosions properly.
- Don't execute block updates for air blocks.
This contains all of the static stuff that was previously embedded in the Entity static root. This solves a bunch of problems like circular dependencies between parent and child classes, encapsulating logic and reducing the size of the enormous Entity.php.
This is a similar refactor to the one I recently did for tiles.
- Entity::createEntity() is removed. In its place are Entity::create() (runtime creation, use where you'd use a constructor, accepts a ::class parameter, throws exceptions on unknown entities) and Entity::createFromData() (internal, used to restore entities from chunks, swallows unknown entities and returns null).
- Entity::registerEntity() is renamed to Entity::register().
- Added Entity::override() to allow overriding factory classes without touching save IDs. This allows more cleanly extending & overriding entities. This method only allows overriding registered Entity classes with children of that class, which makes code using the factory much more sane and allows to provide safety guarantees which make the code less nasty.
- Entity::getKnownEntityTypes() is renamed to Entity::getKnownTypes().
- ProjectileItem::getProjectileEntityType() now returns a ::class constant instead of a stringy ID.
- Cleaned up a bunch of nasty code, particularly in Bow.
This is better for performance because these then don't need to be reevaluated every time they are called.
When encountering an unqualified function or constant reference, PHP will first try to locate a symbol in the current namespace by that name, and then fall back to the global namespace.
This short-circuits the check, which has substantial performance effects in some cases - in particular, ord(), chr() and strlen() show ~1500x faster calls when they are fully qualified.
However, this doesn't mean that PM is getting a massive amount faster. In real world terms, this translates to about 10-15% performance improvement.
But before anyone gets excited, you should know that the CodeOptimizer in the PreProcessor repo has been applying fully-qualified symbol optimizations to Jenkins builds for years, which is one of the reasons why Jenkins builds have better performance than home-built or source installations.
We're choosing to do this for the sake of future SafePHP integration and also to be able to get rid of the buggy CodeOptimizer, so that phar and source are more consistent.
garbage collection does need to be implemented, but I was looking at this code and found so many fucking bugs I decided it wasn't worth the effort of fixing.
I don't know why this would be missing, but in some cases it is, as seen in the crash archive. Whatever the case, we shouldn't be shitting the bed because of this.
