mirror of
https://github.com/Winds-Studio/Leaf.git
synced 2025-12-19 15:09:25 +00:00
88 lines
3.2 KiB
Diff
88 lines
3.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Taiyou06 <kaandindar21@gmail.com>
|
|
Date: Mon, 24 Feb 2025 21:11:09 +0100
|
|
Subject: [PATCH] Slightly optimized VarInt#write
|
|
|
|
Use switch case instead of if-else for branches. It makes it able to use
|
|
tableswitch instruction for better efficiency.
|
|
|
|
Improves it around 1% to 5%
|
|
|
|
diff --git a/net/minecraft/network/VarInt.java b/net/minecraft/network/VarInt.java
|
|
index 6f8dd31582f0e1d3a71acc7a142c1f4ec0539d9e..4c9095995e8515c61d54f1c056be35a12a138ef3 100644
|
|
--- a/net/minecraft/network/VarInt.java
|
|
+++ b/net/minecraft/network/VarInt.java
|
|
@@ -52,35 +52,44 @@ public class VarInt {
|
|
|
|
public static ByteBuf write(ByteBuf buffer, int value) {
|
|
// Gale start - Velocity - optimized VarInt#write
|
|
- if ((value & 0xFFFFFF80) == 0) {
|
|
- buffer.writeByte(value);
|
|
- } else if ((value & 0xFFFFC000) == 0) {
|
|
- int w = (value & 0x7F) << 8
|
|
- | (value >>> 7)
|
|
- | 0x00008000;
|
|
- buffer.writeShort(w);
|
|
- } else if ((value & 0xFFE00000) == 0) {
|
|
- int w = (value & 0x7F) << 16
|
|
- | (value & 0x3F80) << 1
|
|
- | (value >>> 14)
|
|
- | 0x00808000;
|
|
- buffer.writeMedium(w);
|
|
- } else if ((value & 0xF0000000) == 0) {
|
|
- int w = (value & 0x7F) << 24
|
|
- | ((value & 0x3F80) << 9)
|
|
- | (value & 0x1FC000) >> 6
|
|
- | (value >>> 21)
|
|
- | 0x80808000;
|
|
- buffer.writeInt(w);
|
|
- } else {
|
|
- int w = (value & 0x7F) << 24
|
|
- | (value & 0x3F80) << 9
|
|
- | (value & 0x1FC000) >> 6
|
|
- | ((value >>> 21) & 0x7F)
|
|
- | 0x80808080;
|
|
- buffer.writeInt(w);
|
|
- buffer.writeByte(value >>> 28);
|
|
+ // Leaf start - Slightly optimized VarInt#write
|
|
+ int bytesNeeded = getByteSize(value);
|
|
+
|
|
+ switch (bytesNeeded) {
|
|
+ case 1:
|
|
+ buffer.writeByte(value);
|
|
+ break;
|
|
+ case 2:
|
|
+ int w2 = ((value & 0x7F) << 8) | (value >>> 7) | 0x00008000;
|
|
+ buffer.writeShort(w2);
|
|
+ break;
|
|
+ case 3:
|
|
+ int w3 = (value & 0x7F) << 16
|
|
+ | (value & 0x3F80) << 1
|
|
+ | (value >>> 14)
|
|
+ | 0x00808000;
|
|
+ buffer.writeMedium(w3);
|
|
+ break;
|
|
+ case 4:
|
|
+ int w4 = (value & 0x7F) << 24
|
|
+ | ((value & 0x3F80) << 9)
|
|
+ | (value & 0x1FC000) >> 6
|
|
+ | (value >>> 21)
|
|
+ | 0x80808000;
|
|
+ buffer.writeInt(w4);
|
|
+ break;
|
|
+ case 5:
|
|
+ int w5 = (value & 0x7F) << 24
|
|
+ | (value & 0x3F80) << 9
|
|
+ | (value & 0x1FC000) >> 6
|
|
+ | ((value >>> 21) & 0x7F)
|
|
+ | 0x80808080;
|
|
+ buffer.writeInt(w5);
|
|
+ buffer.writeByte(value >>> 28);
|
|
+ break;
|
|
}
|
|
+ // Leaf end - Slightly optimized VarInt#write
|
|
+
|
|
return buffer;
|
|
}
|
|
|