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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/remove-null-possibility-for-getServer-singleton.patch
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@@ -6,7 +6,7 @@ Subject: [PATCH] remove null possibility for getServer singleton
to stop IDE complaining about potential NPE
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 9675d5a100..ca5e4cd65a 100644
index 74c84dda69..eb6ada935f 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -0,0 +0,0 @@ import co.aikar.timings.MinecraftTimings; // Paper