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Use BigDecimal to improve accracy of TPS results - long live 20 TPS!

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It's always been commonly said to 'ignore' that TPS was '19.X', that
it was fine.

I suspect that the inaccuracy of floating point math resulted in us
losing precision over time, making it difficult to actually get back to 20,
as you know the fun 0.1 + 0.1 ... 9 more times != 1 problem.

BigDecimal supports working with doubles with higher precision.

This change makes it so our RollingAverage class maintains all of the data
using BigDecimal and using BigDecimal arithematic operations.

This ensures we have extremely high precision, enabling us to
actually be able print '20 TPS' when TPS is perfect.
This commit is contained in:
Aikar
2018-09-17 22:32:37 -04:00
parent af737481c2
commit bf7742bf96
11 changed files with 31 additions and 27 deletions
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8
Spigot-Server-Patches/Auto-Save-Improvements.patch
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@@ -96,7 +96,7 @@ index 3c9c3cd41d..8d1264879b 100644
public boolean isEmpty() {
diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
index 7417660e4d..7a972f4187 100644
index 9739288b53..a35eac043c 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -0,0 +0,0 @@ public class ChunkProviderServer implements IChunkProvider {
@@ -109,7 +109,7 @@ index 7417660e4d..7a972f4187 100644
}
}
diff --git a/src/main/java/net/minecraft/server/EntityPlayer.java b/src/main/java/net/minecraft/server/EntityPlayer.java
index faf733f824..c6903559ef 100644
index 3d83900298..690cff8828 100644
--- a/src/main/java/net/minecraft/server/EntityPlayer.java
+++ b/src/main/java/net/minecraft/server/EntityPlayer.java
@@ -0,0 +0,0 @@ public class EntityPlayer extends EntityHuman implements ICrafting {
@@ -121,7 +121,7 @@ index faf733f824..c6903559ef 100644
public final MinecraftServer server;
public final PlayerInteractManager playerInteractManager;
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 13d3315b9c..a367cbf52b 100644
index 04d8c108b4..a547ee5ca1 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -0,0 +0,0 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati
@@ -207,7 +207,7 @@ index 02dbb8c6c3..73d72ef7e3 100644
public WhiteList getWhitelist() {
return this.whitelist;
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index 4be3a6ae94..59b5a04581 100644
index c5201697d5..ca2e027cda 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -0,0 +0,0 @@ public class WorldServer extends World implements IAsyncTaskHandler {