
Xp Bottle Optimizer
Optimizes XP bottle throwing client side to be instant like zero ping.
Screenshots


About this Mod
XP Bottle Optimizer
Makes XP bottles feel more instant and responsive on the client side.
When throwing XP bottles on servers, the bottle can feel delayed because your client has to wait for the server bottle to appear first.
XP Bottle Optimizer helps by showing a client side XP bottle instantly, making XP bottle throwing feel smoother especially when you have ping.
Works across 1.21 - 1.21.11 in the same jar (1.21.X)
Requires:

What it does
When you throw an XP bottle, XP Bottle Optimizer shows a client side XP bottle instantly instead of waiting for the server bottle to appear first.
This helps XP bottles feel cleaner and more responsive on servers, especially if your ping makes bottles look delayed or weird.
The server still controls the real XP bottle, real XP drops, inventory usage, cooldowns, bottle breaking, and all real server behavior.
This mod does not give extra XP, does not duplicate bottles, does not make XP appear early server side, does not change bottle speed, and does not bypass the server.
It only makes the visual side feel smoother while the server stays in control of what actually happens.
works simular to my other mods
XP Bottle Optimizer also reduces duplicate delayed throw sounds when the real server sound comes in after the predicted client side throw.
This helps keep XP bottle throwing feeling fast without making the sound messy or doubled.
There is also server opt out support, so servers can disable XP Bottle Optimizer if they do not want players using it on their server.
This mod is client side, but if a server opts out then the optimizer will turn itself off there.
if you want the opt out just make a ticket in the discord!
XP Bottle Optimizer is only a visual responsiveness mod, so don't worry about it changing how XP bottles actually work server side. Throwing, inventory, XP drops, bottle breaking, and real XP bottle behavior are still handled by the server like normal.
Available Versions
How to Install Xp Bottle Optimizer on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.11).
Install Mod
Open the mod browser in the dashboard and search for "Xp Bottle Optimizer". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.11, 1.21.10, 1.21.9 (+9 more)
Server-side
✗ UnsupportedRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Xp Bottle Optimizer server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.
Is Xp Bottle Optimizer compatible with fabric?
Xp Bottle Optimizer officially supports fabric for Minecraft 1.21.11, 1.21.10, 1.21.9. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Xp Bottle Optimizer – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Xp Bottle Optimizer consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install Xp Bottle Optimizer with just one click on your server.