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Martijn Muijsers edited this page Jun 29, 2026 · 10 revisions

All included features are listed below.
Features originating from other projects are carefully verified and updated as part of Gale.

  • Cache
    Lazily compute values and cache them while they remain valid.
    • Identifier.hashCode() and Identifier.toString() (original by OverwriteMC)
      Lazily cache Identifier toString() and hashCode().
      Leaf: Cache-identifier-toString-and-hash.patch
    • NoiseBasedChunkGenerator.getSeaLevel() (original by jaskarth)
      This method is potentially called for every block in the chunk, so this will save a lot of lookups.
      Leaf: Cache-world-generator-sea-level.patch
    • SpecialDates.isHalloween()
      Pre-compute the epoch milliseconds for the next Halloween, for faster comparison.
      Leaf: Predict-Halloween.patch
  • Collections
    Use an optimal collection type (such as one from it.unimi.dsi.fastutil, or a linked map for fast iteration), potentially initialized with a specific capacity.
    • ChunkMap.entityMap
      Using a linked map is nearly equivalent to the non-linked map, but slightly faster in practice due to the frequency of full iterations.
      Leaf: Use-linked-map-for-entity-trackers.patch
    • ChunkMap.TrackedEntity.seenBy
      Store seenBy in a fast-access format
      • Split ChunkMap.TrackedEntity.seenBy into a list (for iteration) and a packed boolean array (for set functionality) in which each Connection is indexed by Connection.packedSeenByWordIndex and Connection.packedSeenByWordMask.
      • Make ServerEntity.trackedPlayers a list.
    • MobCounts.counts (use array) (original by ishland)
      Leaf: Store-mob-counts-in-an-array.patch
    • Sensing
      Most mobs only ever target at most 1 entity (typically a nearby player or a mob farm bait entity)
      so we create their sensing cache with an initial capacity of 2 instead of 16.
      Leaf: Initialize-line-of-sight-cache-with-low-capacity.patch
    • ServerHandshakePacketListenerImpl.throttleTracker
      Leaf: Replace-throttle-tracker-map-with-optimized-collecti.patch
    • SynchedEntityData.packDirty() (original by hayanesuru)
      Leaf: Optimize-SynchedEntityData-packDirty.patch
    • WorldConfiguration.Entities.Spawning.despawnRanges (use EnumMap) (original by hayanesuru)
      Leaf: part of optimize-despawn.patch
  • Do less work
    Evaluate the cheapest conditions first, and avoid doing unnecessary work.
    • Check ticks frozen difference only once (original by hayanesuru)
      Leaf: Only-update-frozen-ticks-if-changed.patch
    • EntitySelector.pushableBy() (original by OverwriteMC)
      Avoid duplicated Bukkit.isPushable() check, already checked inside the Bukkit.canCollideWithBukkit().
      Leaf: Optimize-pushable-selector.patch
    • Exit Bukkit event call early if no listeners (original by lilingfengdev)
      Leaf: Skip-event-if-no-listeners.patch
    • Level.checkEntityCollision()
      Perform other checks before canSee, because the latter is more expensive.
      Leaf: Reduce-canSee-work.patch
    • LivingEntity.tryAddFrost() (original by 2No2Name)
      Sort the checks in LivingEntity.tryAddFrost() in ascending order of cost.
      Leaf: Check-frozen-ticks-before-landing-block.patch
    • Raid.updateBossbar() (original by jellysquid3)
      Performs the code in Raid.updateBossbar() at most once per tick (during tick()), instead of every time it is called.
      Leaf: Update-boss-bar-within-tick.patch
    • RespawnAnchorBlock.explode() (original by Dreeam)
      Compute inWater as late as possible.
      Leaf: part of Optimize-respawn-anchor-explosion.patch
    • SetLookAndInteract.create() (original by Taiyou)
      Check type before computing distance, because the latter is more expensive.
      Leaf: part of Optimize-SetLookAndInteract-and-NearestVisibleLiving.patch
    • Skip client-side code
      Do not perform actions server-side if the result is only used client-side.
      • Leashable.getLeashHolder() (original by MrlingXD)
        Leaf: Optimize-getLeashHolder.patch
    • Skip negligible planar movement multiplication
      Skip calling Entity.getBlockSpeedFactor() from Entity.move() when planar delta movement is negligible (within 1.0E-6 threshold).
      Leaf: Skip-negligible-planar-movement-multiplication.patch
    • Skip PlayerCommandSendEvent if no listeners (original by BillyGalbreath)
      Leaf: Skip-PlayerCommandSendEvent-if-there-are-no-listener.patch
    • Skip self check in CraftPlayer.canSee() if called from ChunkMap.updatePlayer() (original by MrPowerGamerBR)
      Skip the self check, as it was already checked at that point.
      Leaf: SparklyPaper-Optimize-canSee-checks.patch
    • Skip unnecessary Entity.move() code if bounding box and position are unchanged (original by ishland)
      Run a simplified version of Entity.move() if the bounding box was not changed and the movement delta is zero.
      Leaf: Skip-entity-move-if-movement-is-zero.patch
    • TargetingConditions.test() (original by PaulBGD)
      Check targeting range before computing visibility distance, because the latter is more expensive.
      Leaf: Check-targeting-range-before-getting-visibility.patch
  • Event-driven
    Update (and keep cached) values or take certain actions when the underlying conditions change, instead of calculating the value or considering the action every time it is requested.
    • Entity.playerPassengerCount
    • Mob.isLeashed
    • Mob.isPersistent
    • Mob.mustDespawnBecauseOfPeacefulDifficulty
    • Mob.requiresCustomPersistence
    • Mob.shouldDespawnInPeaceful
  • Faster implementation for subclass
    Override a superclass method with a faster implementation specific to the subclass.
    • LevelChunk.getSectionIndex()(original by hayanesuru)
      Leaf: part of optimize-LevelChunk-getBlockStateFinal.patch
  • Intrusive values
    Store properties of some types directly as a field, instead of in some external data structure.
    • CraftPlayer.invertedVisibilityEntities
      For each entry in CraftPlayer.invertedVisibilityEntities, store a corresponding inverse entry in CraftEntity.packedVisibilityInversions, an efficient data structure in which each player is indexed by CraftPlayer.packedVisibilityInversionsWordIndex and CraftPlayer.packedVisibilityInversionsWordMask.
      This allows for fast lookups from CraftPlayer#canSee().
    • EntityDataSerializers.SERIALIZERS
      Make EntityDataSerializers.SERIALIZERS a simple list, and store EntityDataSerializers.getSerializedId(EntityDataSerializer) in AbstractEntityDataSerializer.indexInList.
    • Global block state palette id
      Store Block.BLOCK_STATE_REGISTRY.getId(BlockState) in BlockState.indexInRegistry.
    • Registry elements
      • Make Registry.getId(T) available as IdAwareRegistryValue.getIdInRegistry() (which is stored in FieldIdAwareRegistryValue.idInRegistry).
      • Store Registry.asHolderIdMap().IdMap.getId(Holder) in Holder.Reference.idInRegistry.
  • Local code optimization
    Make small, localized procedures faster.
    • Add equality check to ItemStack.isSameItem...()
      Leaf: Optimize-matching-item-checks.patch
    • DedicatedServer.getScaledTrackingDistance() (original by hayanesuru)
      Leaf: Optimize-getScaledTrackingDistance.patch
    • EntityBasedExplosionDamageCalculator.getBlockExplosionResistance() (reduce allocations) (original by 2No2Name)
      Leaf: Reduce-lambda-and-Optional-allocation-in-EntityBased.patch
    • EntityGetter.getNearestPlayer() (original by Taiyou)
      Leaf: Slightly-optimise-getNearestPlayer.patch
    • GateBehavior.tickOrStop() (remove stream) (original by Taiyou)
      Leaf: Remove-stream-in-GateBehavior.patch
    • Inline player UUID comparison
    • LevelChunk.getBlockStateFinal()(original by hayanesuru)
      Leaf: optimize-LevelChunk-getBlockStateFinal.patch
    • LivingEntity.tickEffects() (don't iterate over empty effect collection) (original by hayanesuru)
      Leaf: part of optimize-tickEffects.patch
    • MobEffectUtil.getDigSpeedAmplification() (original by Taiyou)
      Leaf: Optimise-MobEffectUtil-getDigSpeedAmplification.patch
    • MobSensor.checkForMobsNearby() (remove stream) (original by Taiyou)
      Leaf: Remove-stream-in-MobSensor.patch
    • NearestVisibleLivingEntities.findClosest() (add empty check and size variable) (original by Taiyou)
      Leaf: part of Optimize-SetLookAndInteract-and-NearestVisibleLiving.patch
    • new Advancement() (skip cloning criteria) (original by etil2jz)
      Leaf: Skip-cloning-advancement-criteria.patch
    • PatchedDataComponentMap.equals() (original by HaHaWTH)
      Leaf: Optimize-PatchedDataComponentMap-equals.patch
    • ServerLevel.destroyBlockProgress() (allocate zero or one block destruction packets) (original by vytskalt)
      Leaf: Reduce-block-destruction-packet-allocations.patch
  • Math
    Optimize mathematical expressions by hardware operation efficiency. For example, multiplication is faster than division on all hardware.
    • CubePointRange.getDouble() (replace division by multiplication) (original by 2No2Name)
      Leaf: Replace-division-by-multiplication-in-CubePointRange.patch
  • Pre-compute
    Pre-compute values instead of repeatedly computing them whenever needed.
    • BiomeManager.getFiddle() (original by hayanesuru)
      Leaf: part of cache-biome-for-mob-spawning-and-advancements.patch
    • Common BlockState predicates (original by hayanesuru)
      Pre-computes some commonly tested predicates on BlockStates.
      Leaf:
      • part of Cache-block-state-tags.patch
      • optimize-canHoldAnyFluid.patch
      • part of optimize-getOnPos.patch
      • optimize-isStateClimbable.patch
    • Enchantment.matchingSlot()
      Leaf: replaces Remove-stream-in-matchingSlot.patch
    • Registry tags
      Pre-compute the tags for each registry element and store them in Holder.tagsBitSet, an efficient data structure in which each tag is indexed by TagKey.indexInRegistryWordIndex and TagKey.indexInRegistryWordIndex.
  • Reduce allocations
    Reduce object allocations. This also saves time during garbage collection.
    • RandomSource (original by foss-mc)
      Re-use RandomSource instances where it doesn't affect game mechanics.
      Leaf: Reduce-RandomSource-instances.patch
  • Skip enderman teleport if requires main thread chunk load (original by PaulBGD)
    Leaf: Reduce-enderman-teleport-chunk-lookups.patch

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