NEB通过多种方式来尽可能地节省Minecraft游玩过程中产生的流量，并对模组和玩家保持透明。
在TeaCon 甲辰的土球数据集中，相比未压缩的原始数据，NEB理论上可以将服务器的出站流量减少到原来的7.6%，实际测得的值约为13.8%。
NEB uses various methods to save as much network traffic as possible during Minecraft gameplay, while remaining transparent to both mods and players.
In the ZZZZ Dataset from TeaCon Jiachen, compared to raw uncompressed data, NEB can theoretically reduce the server's outbound traffic to 7.6% of its original size, with an actual measured value of approximately 13.8%.
在原版环境下的测试中，服务器出站流量被减少到原来的18%。理论上，随着安装的模组数量的增加，网络传输的内容会更多更复杂，压缩效果会更好。
In tests conducted in a Vanilla environment, the server outbound traffic was reduced to 18% of its original size. Theoretically, as the number of installed mods increases, the content transmitted over the network becomes larger and more complex, leading to better compression performance.
在游戏中按下Alt+N来简单地查看流量情况。
Press Alt+N in-game to easily view the network traffic status.
优化CustomPacketPayload编码及对应解码，以紧凑的索引替代包头的Identifier(Packet Type)，使模组网络包包头消耗减少为固定3-4字节，而不是网络包类型对应的字符串长度。
Optimize CustomPacketPayload encoding and decoding by replacing the packet header Identifier (Packet Type) with a compact index. This reduces the mod network packet header overhead to a fixed 3-4 bytes, instead of the length of the string corresponding to the network packet type.
索引结构如下：
The index structure is as follows:
Note
┌------------- 1 byte (8 bits) ---------------┐
│ function flags │
├---┬---┬-------------------------------------┤
│ i │ t │ reserved (6 bits) │
└---┴---┴-------------------------------------┘
- i = indexed (1 bit)
- t = tight_indexed (1 bit, only valid if i=1)
- reserved = 6 bits (for future use)
- If i=0 (not indexed):
┌---------------- N bytes ----------------
│ Identifier (packet type) in UTF-8
└-----------------------------------------
- If i=1 and t=0 (indexed, NOT tight):
┌-------- 1 byte ---------┬-------- 1 byte --------┬-------- 1 byte --------┐
┌------------- 12 bits ---------------┬-------------- 12 bits --------------┐
│ namespace-id (capacity 4096) │ path-id (capacity 4096) │
└-------------------------------------┴-------------------------------------┘
- If i=1 and t=1 (indexed, tight):
┌--------- 1 byte ----------┬--------- 1 byte ---------┐
┌--------- 8 bits ----------┬--------- 8 bits ---------┐
│namespace-id (capacity 256)│ path-id (capacity 256) │
└---------------------------┴--------------------------┘
Then packet data.
网络包namespace及对应的每个path少于256时为3字节，大于256时为4字节。即最多支持4096个模组，每个模组4096条通道。
It occupies 3 bytes when the network packet namespace and its corresponding path are fewer than 256, and 4 bytes when greater than 256. This supports up to 4096 mods, with 4096 channels per mod.
优化原版经常出现大量小体积网络包的情况，在Connection层面拦截发送，每隔20ms组装为一个大网络包，并进行压缩后发送。
Optimize the situation where vanilla often produces a large number of small network packets. Intercept transmission at the Connection level, assemble them into one large network packet every 20ms, and send it after compression.
Note
┌---┬----┬----┬----┬----┬----┬----...
│ S │ p0 │ s0 │ d0 │ p1 │ s1 │ d1 ...
└---┴----┴----┴----┴----┴----┴----...
└--packet 1---┘└--packet 2---┘
└----------compressed----------┘
- S = varint, size of compressed buf
- p = prefix (medium/int/utf-8)， type of this subpacket
- s = varint, size of this subpacket
- d = bytes, data of this subpacket
在原版，当玩家移动时，服务端会指示客户端立即忘记身后的区块；如果又回到原来的位置，就需要发送区块的全量信息。通过延后这个“忘记”，可以节省在机器上跳来跳去时产生的区块发送流量。
In Vanilla, when a player moves, the server instructs the client to immediately forget the chunks behind them; if the player returns to the original position, the full chunk data must be sent again. By delaying this "forgetting", the chunk transmission traffic generated when poking around can be saved.
在config/NotEnoughBandwidthConfig.json修改配置文件。
Modify the configuration file at config/NotEnoughBandwidthConfig.json.
Note
此选项在客户端和服务端独立生效。
WORK INDEPENDENTLY ON CLIENT AND SERVER.
是否要开启兼容模式。如果为true，下方的blackList会被启用。
Whether to enable compatibility mode. If set to true, the blackList below will be used.
Note
此选项在客户端和服务端独立生效。
WORK INDEPENDENTLY ON CLIENT AND SERVER.
兼容模式黑名单。在黑名单中的包会被NEB跳过。默认自带一系列和velocity相关的包，你也可以按需增加新的包。
The blacklist for compatibility mode. Packets listed here will be skipped by NEB. By default, it includes a list of Velocity-related packets, but you can add new packets as needed.
Warning
为确保包的顺序性，黑名单中的包会打断正在进行的聚合。如果黑名单中有许多的包，或者对应包发送过于频繁，则聚合-压缩的效率会降低。
To ensure packet ordering, packets in the blacklist will interrupt the ongoing aggregation. If there are many packets in the blacklist, or if the corresponding packets are sent too frequently, the efficiency of aggregation-compression will decrease.
Note
此选项在客户端和服务端独立生效。
WORK INDEPENDENTLY ON CLIENT AND SERVER.
在进行压缩时的上下文窗口长度。可选范围为21~25的整数，分别代表2~32MB。默认为23，即8MB。
上下文窗口长度越长，则压缩效果越好，越节省流量；但也会消耗更多的内存。
The context window size used for compression. Valid values are integers from 21 to 25, representing 2MB to 32MB respectively. The default is 23 (8MB).
A larger context window results in better compression and bandwidth savings, but consumes more memory.
Tip
对于100名玩家的服务器，设置为25会产生约额外3200MB的内存占用。
For a server with 100 players, a setting of 25 will result in approximately 3200MB of additional memory usage.
Note
这些选项仅在服务端生效。
ONLY WORK ON SERVER.
延迟区块缓存（DCC）允许的最大缓存区块数量、缓存区块距离、缓存过期时间。较大的值可能会占用更多内存，较小的值可能会更频繁地触发更新。
The maximum number of cached chunks, cached chunk distance, and cache timeout allowed by the Delayed Chunk Cache (DCC). Larger values may consume more memory, while smaller values may trigger updates more frequently.
Copyright (C) 2025 USS_Shenzhou
本模组是自由软件，你可以再分发之和/或依照由自由软件基金会发布的 GNU 通用公共许可证修改之，无论是版本 3 许可证，还是（按你的决定）任何以后版都可以。
发布这个模组是希望它能有用，但是并无保障；甚至连可销售和符合某个特定的目的都不保证。请参看 GNU 通用公共许可证，了解详情。
Copyright (C) 2025 USS_Shenzhou
This mod is free software; you can redistribute it and/or modify them under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
a）当你作为游戏玩家，加载本程序于Minecraft并游玩时，本许可证自动地授予你一切为正常加载本程序于Minecraft并游玩所必要的、不在GPL-3.0许可证内容中、或是GPL-3.0许可证所不允许的权利。如果GPL-3.0许可证内容与Minecraft EULA或其他Mojang/微软条款产生冲突，以后者为准。
a) As a game player, when you load and play this program in Minecraft, this license automatically grants you all rights necessary, which are not covered in the GPL-3.0 license, or are prohibited by the GPL-3.0 license, for the normal loading and playing of this program in Minecraft. In case of conflicts between the GPL-3.0 license and the Minecraft EULA or other Mojang/Microsoft terms, the latter shall prevail.