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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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2
Spigot-Server-Patches/Add-Early-Warning-Feature-to-WatchDog.patch
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@@ -37,7 +37,7 @@ index cc2e4ad3bd..54f088c242 100644
public static int tabSpamLimit = 500;
private static void tabSpamLimiters() {
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 2e9836d8f9..8b8cbde2b9 100644
index 18eeee5106..6fa54386e8 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