[AMT] | Alex’s Mobs: Tweaks

《▒ What It Does ▒》

Alex’s Mobs: Tweaks, or AMT, is a lightweight performance addon that fixes several expensive Alex’s Mobs and Citadel hot paths without changing how the mobs are supposed to behave.

Some systems inside Alex’s Mobs do a LOT more work than they really need to. One example literally sorted an entire candidate list just to find the nearest valid mob xd.

AMT replaces those paths with much cheaper exact alternatives, including a stable linear nearest candidate pass, and routes compatible pathfinding through Quantified API’s controlled worker lanes.

This means lower MSPT, fewer nasty tick spikes, less random CPU abuse and a LOT more room for everything else to run :DDD

Same mobs, same behaviour, substantially less CPU bullying.

《▒ FPS Gains Are A BIG Part Of AMT ▒》

AMT is NOT just some server TPS mod btw. It can make a really noticeable difference to client FPS too, especially when you’re around a ton of Alex’s Mobs entities at once.

Crowded Alex’s Mobs areas are where this thing tends to cook the most. If Alex’s Mobs is eating a large chunk of your CPU, AMT can free up a pretty stupid amount of it, which means higher FPS, smoother frametimes and way less stuttering :DDD

Users testing it in mob heavy environments have seen some pretty damn big performance jumps, so if your world has a lot of Alex’s Mobs running around, this is probably where you’ll notice AMT the most.

Basically, the more cursed the mob load gets, the more AMT has to optimise xd.

《▒ Real Server Performance ▒》

Paired Forge server test using the same persisted world, the same 372 entities and the same 60 second Spark window:

Both runs alr maintained 20 TPS, so the real win here is lower tick cost, way better p95 stability and a FAR smaller worst tick. Exact gains will ofc depend on your world, entity count and modpack.

《▒ Puffish Hot Path ▒》

One of the main fixes replaces Puffish’s full candidate sorting with one stable linear nearest candidate pass.

32,768 randomized correctness cases passed with the same nearest candidate and stable tie behaviour.

《▒ Quantified API Integration ▒》

Compatible path search work gets routed through Quantified API’s bounded background lane instead of being dumped into some generic executor and left to fight everything else xd.

Quantified API handles scheduling, task ownership and diagnostics while Minecraft sensitive work stays on the correct thread.

《▒ Compatibility ▒》

Requires Quantified API V2.

On Minecraft 1.20.1, AMT supports the official Alex’s Mobs release alongside Citadel, as well as compatible Fabric and NeoForge ports of Alex’s Mobs.

Starting with AMT V1.2.0, all newer Minecraft versions use Alex’s Mobs Continued instead :]

This means newer versions no longer rely on separate Citadel ports. AMT also includes the required CodxLib compatibility for Alex’s Mobs Continued.

Currently supported versions:

• Minecraft 1.20.1 with the official Alex’s Mobs release, including supported Fabric and NeoForge ports
• Minecraft 1.21.1 with Alex’s Mobs Continued
• Minecraft 1.21.11 with Alex’s Mobs Continued
• Minecraft 26.1 with Alex’s Mobs Continued
• Minecraft 26.2 with Alex’s Mobs Continued

Loader support depends on the Minecraft version and the Alex’s Mobs or Alex’s Mobs Continued build available for it.

Dependencies:

• Minecraft 1.20.1 requires Alex’s Mobs or a supported Fabric/NeoForge port, its required library dependencies, and Quantified API V2
• Newer versions require Alex’s Mobs Continued, CodxLib and Quantified API V2

AMT V1.1.0 previously supported several additional unofficial Alex’s Mobs ports. V1.2.0 and newer moved newer Minecraft versions over to Alex’s Mobs Continued, while compatible Fabric and NeoForge support remains available where supported.

《▒ Licensing and Support ▒》

Licensed under BRSSLA, which is free for personal and non-commercial use.

Found a bug, got an idea, or somehow found another Alex’s Mobs method sorting half the planet for one result? Feel free to report it :]