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Upstream has released updates that appear to apply and compile correctly. This update has not been tested by PaperMC and as with ANY update, please do your own testing Bukkit Changes: 2ec53f49 PR-1050: Fix empty result check for Complex Recipes 10671012 PR-1044: Add CrafterCraftEvent 4d87ffe0 Use correct method in JavaDoc ae5e5817 SPIGOT-7850: Add API for Bogged shear state 46b6d445 SPIGOT-7837: Support data pack banner patterns d5d0cefc Fix JavaDoc error b3c2b83d PR-1036: Add API for InventoryView derivatives 1fe2c75a SPIGOT-7809: Add ShieldMeta CraftBukkit Changes: 8ee6fd1b8 SPIGOT-7857: Improve ItemMeta block data deserialization 8f26c30c6 SPIGOT-7857: Fix spurious internal NBT tag when deserializing BlockStateMeta 759061b93 SPIGOT-7855: Fire does not spread or burn blocks 00fc9fb64 SPIGOT-7853: AnvilInventory#getRepairCost() always returns 0 7501e2e04 PR-1450: Add CrafterCraftEvent 8c51673e7 SPIGOT-5731: PortalCreateEvent#getEntity returns null for nether portals ignited by flint and steel d53d0d0b1 PR-1456: Fix inverted logic in CraftCrafterView#setSlotDisabled 682a678c8 SPIGOT-7850: Add API for Bogged shear state fccf5243a SPIGOT-7837: Support data pack banner patterns 9c3bd4390 PR-1431: Add API for InventoryView derivatives 0cc6acbc4 SPIGOT-7849: Fix FoodComponent serialize with "using-converts-to" using null 2c5474952 Don't rely on tags for CraftItemMetas 20d107e46 SPIGOT-7846: Fix ItemMeta for hanging signs 76f59e315 Remove redundant clone in Dropper InventoryMoveItemEvent e61a53d25 SPIGOT-7817: Call InventoryMoveItemEvent for Crafters 894682e2d SPIGOT-7839: Remove redundant Java version checks 2c12b2187 SPIGOT-7809: Add ShieldMeta and fix setting shield base colours Spigot Changes: fb8fb722 Rebuild patches 34bd42b7 SPIGOT-7835: Fix issue with custom hopper settings
55 Zeilen
2.9 KiB
Diff
55 Zeilen
2.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Sat, 12 Sep 2020 17:21:38 -0400
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Subject: [PATCH] Cache DataFixerUpper Rewrite Rules on demand
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Mojang precaches every single potential rewrite rule that could ever
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exist on server startup. This includes rules from all the way back to versions from 6+ years ago.
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This is the source of why the server hogs every CPU core at 100% every start.
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For anyone who hard resets for updates or has force upgraded their entire world, this
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results in completely wasted cpu cycles.
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This massive CPU usage also delays server startup time.
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We improve this by making "min version to precache" that defaults to a future version
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so that no rewrite rules are precached.
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someone who expects to be converting a lot chunks could theoretically set
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-DPaper.minPrecachedDatafixVersion=<dataVersionConvertingFrom> as a startup
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parameter and only build from that point on.
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However this will likely never be needed as the server will still run
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the same cache logic on demand when it's actually needed. The only
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cost would be some delay on the FIRST chunk conversion, but paper already
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runs chunk conversions on another thread so this will likely never be
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a concern for TPS.
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This patch will significantly reduce CPU use on startup, reduce memory usage,
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and improve server startup time.
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diff --git a/src/main/java/com/mojang/datafixers/DataFixerBuilder.java b/src/main/java/com/mojang/datafixers/DataFixerBuilder.java
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index 4232ce05ad7dd122a78a04ccef3b59d4caf542df..2cce259c738de2680e219d30dc3020458f4442d6 100644
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--- a/src/main/java/com/mojang/datafixers/DataFixerBuilder.java
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+++ b/src/main/java/com/mojang/datafixers/DataFixerBuilder.java
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@@ -29,8 +29,10 @@ public class DataFixerBuilder {
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private final Int2ObjectSortedMap<Schema> schemas = new Int2ObjectAVLTreeMap<>();
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private final List<DataFix> globalList = new ArrayList<>();
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private final IntSortedSet fixerVersions = new IntAVLTreeSet();
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+ private final int minDataFixPrecacheVersion; // Paper - Perf: Cache DataFixerUpper Rewrite Rules on demand
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public DataFixerBuilder(final int dataVersion) {
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+ minDataFixPrecacheVersion = Integer.getInteger("Paper.minPrecachedDatafixVersion", dataVersion+1) * 10; // Paper - Perf: default to precache nothing - mojang stores versions * 10 to allow for 'sub versions'
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this.dataVersion = dataVersion;
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}
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@@ -88,6 +90,7 @@ public class DataFixerBuilder {
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final IntIterator iterator = fixerUpper.fixerVersions().iterator();
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while (iterator.hasNext()) {
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final int versionKey = iterator.nextInt();
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+ if (versionKey < minDataFixPrecacheVersion) continue; // Paper - Perf: Cache DataFixerUpper Rewrite Rules on demand
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final Schema schema = schemas.get(versionKey);
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for (final String typeName : schema.types()) {
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if (!requiredTypeNames.contains(typeName)) {
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