HTP CIT Resewn Optimizer
by HTP
HTP CIT Resewn Optimizer is a client-side patch for Fabric that cuts the CPU and memory costs of a custom item texture mod on version 1.20.1.
What it does
The patch stores the results of custom item texture evaluations, so repeat lookups skip the full recalculation. Without it, the texture logic runs again on every frame even when nothing has changed, which uses extra processor time while a player browses large inventories or item grids from other mods.
The patch also addresses a memory leak in the texture mod, where objects were attached to each item stack and never released, adding more than 1 GB of RAM per session. Removing the per-frame allocations lowers garbage collection pressure. The mod runs on the client alone, so servers need nothing installed, and it is released under the MIT License. It is not open source. Files exist for 1.20.1 only.
Key features
Cached texture lookups
Results of custom item texture evaluations are stored, so repeat lookups skip the full recalculation.
Memory leak fix
Objects attached to each item stack are released, stopping steady growth in RAM use.
Lower garbage collection load
Per-frame allocations are removed, which reduces the pauses caused by garbage collection.
Lighter inventory browsing
Large inventories and item grids from other mods take less processor time to display.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Long play sessions
Memory no longer climbs until it reaches the heap limit, which had caused stutters several times a day.
Relogging on servers
Stutters that appeared most often after rejoining a server are reduced, since the leaked memory is no longer kept between logins.
Who it’s for: Players who use a custom item texture mod on 1.20.1 in large modpacks, and players who notice stutters during long sessions or when reconnecting to servers.
How it compares
Tab Optimizer is a client-side mod for Fabric with an MIT License and open source code, published for 1.21.11. ELO - Entity LOD Optimizer is a server-side mod for Fabric under the GNU General Public License v3.0 or later, open source, for 1.20.1 – 1.20.6, and it works on the server rather than in the client. HTP CIT Resewn Optimizer targets only 1.20.1 and is not open source.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| HTP CIT Resewn Optimizer | Fabric | 1.20.1 | Client-side only | 2026-03-01 |
| Tab Optimizer | Fabric | 1.21.11 | Client-side only | 2026-07-23 |
| ELO - Entity LOD Optimizer | Fabric | 1.20.1 – 1.20.6 | Server-side only | 2025-08-09 |
Questions
Does HTP CIT Resewn Optimizer need another mod installed?
Does the server need this mod?
Which Minecraft versions does the patch support?
In the catalog
HTP CIT Resewn Optimizer is one of 3,545 Optimization mods on ModsFinder, and one of 2,575 Optimization mods for Fabric. 34,764 mods support Minecraft 1.20.1.
Similar mods
What the author says
CIT Resewn has two issues in large modpacks. First, it re-evaluates custom item textures every frame even when nothing has changed — this causes unnecessary CPU usage when browsing large inventories or EMI item grids. Second, it leaks over 1 GB of RAM per session by allocating objects into every ItemStack that are…
Official listing
- Modrinth page
- modrinth.com/mod/htp-citoptimizer
- Owner
- HTP
- Published
- 2026-03-01
- Updated on Modrinth
- 2026-03-01
- Facts verified
- 2026-10-15