BLUF: FTB Infinity Evolved 3.1.0 Expert, running on Java 25 with maintained 1.7.10 mod forks and modern performance mods. The goal is to keep IE's Expert progression while fixing old bugs—not to add GregTech or turn it into GT New Horizons. The recorded comparison shows 2.5× the average frame rate and roughly half the startup time. This guide includes a pinned installer, a manual install path, every config change, and the source for the custom compatibility fixes.
Snapshot: 2026-10-25. Windows single-player is the verified target. This is an unofficial, new-world setup, not an official FTB or GTNH release or a drop-in world upgrade.
| 3.1.0 as released | This build | |
|---|---|---|
| Java | 8 | 25 (ZGC, compact object headers) |
| Startup from FML logging to the main menu, median | 63 s | 35 s |