due to the extremely large performance cost of instantiating AsyncTasks, it's usually not worth bothering with async compression except for very large packets.
While this large overhead can be significantly reduced by using specialized threads, it's early days in the testing stages for such improvements, and for now, we still have this to deal with.
Since async compression is always used prior to player spawn, this change may slightly improve the performance of the pre-join stage of the game.
we rely on phpstan for validation of this internally, and plugins shouldn't be calling these methods anyway.
this significantly reduces the overhead of CompressBatchPromise.
For blocks, we now use 'block-item state' and 'block-only state', which should be much clearer for people implementing custom stuff.
'block-item state', as the name suggests, sticks to the item when the block is acquired as an item.
'block-only state' applies only to the block and is discarded when the block is acquired as an item.
'type data' for items was also renamed, since 'type' is too ambiguous to be anything but super confusing.
moral of the story: do not trust that mojang things do what they say they do - the spectator ability layer always applies, regardless of whether the player is actually in spectator mode or not ...
there's a bunch of places we can't reach with this right now:
- particles
- sounds
- tile NBT
- entity metadata
- crafting data cache
- chunk encoding
- world block update encoding
this is a work in progress, but ultimately we want to get rid of these singletons entirely.
When timings was disabled, internalStopTiming is not called, and timer depth is not decremented.
If timings is later reenabled, the next call to internalStartTiming will think the timer is already running, and won't generate any new records for the timer.
This has led to broken timings reports with missing Full Server Tick entries, amongst other things.
fixes#5722
I'm not very clear why this works. PM doesn't use real spectator mode yet (we're still using the faux spectator mode PM has had for years, because I haven't yet assessed how real spectator mode will affect stuff like block interactions), so this ability layer shouldn't have any effect.
thank you @Alemiz112
due to direct repeated usage of registerEvent() with closures, we've seen some libraries like muqsit/SimplePacketHandler generate very large timings reports, because a new timings handler gets created every time a plugin registers or unregisters a new packet handler callback.
This change fixes the problem by ensuring that any handlers derived from the same function, handling the same event class, will share the same timer.
this saves a considerable amount of memory.
we don't actually need this state array in PM4 anyway, since we don't support the client-side chunk cache yet.
when the time comes to support it, it'll be much more practical to cache binary states and copy bytes anyway, instead of doing it the current way, which is both slow and memory-intensive.
Measured footprint change: 9 MB -> 400 KB.
the aim of the game here is to avoid allocating lots of tiny arrays, which have a terrible overhead:useful-data ratio.
This reduces the footprint of the mapping from 1.6 MB to 600 KB.
this allows saving about 4 MB of memory, because there are many blocks which have identical states, although they have different IDs.
this relies on a potentially risky assumption that the tags in knownStates won't be modified. If they are modified, the changes will influence all blockstates which share the tag.
However, I don't expect this to happen, and the 4 MB memory saving is substantial enough to be worth the risk.
