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README: a Performance section from the 2026-10-29 Horizon vs vanilla runs

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The comparison #1073 asks for, in the repository: FPS and 1% lows at render
distances 8, 16 and 32 for Horizon, vanilla 26.3 and vanilla with the common
performance mods, from the clean, all-windowed, idle-machine run already saved
in benchmarks/perf/, with the conditions, the startup/load/memory figures and
links to the full reports, the method and playhorizon.dev/benchmarks.

Co-Authored-By: OpenCode Agent <[email protected]>

Co-Authored-By: opencode (DeepSeek V4.1 Flash) <[email protected]>
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CocofireHDandOpenCode Agent committed 2026-11-06 13:25:46 +01:00
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@@ -49,6 +49,18 @@ Everything below is in the current release.
<sub>Nightly 2026-11-05 on a Mac mini (Apple M4 Pro, Metal): vanilla's textures, no mods or shader packs, render distance 32 with distant terrain on.</sub>
## Performance
**Horizon draws more frames per second than Java Edition, and loads faster, on the same machine, world and path.** `tools/perf_bench.py` runs each game in turn, from a fresh world (seed 1234), waiting for the terrain and then flying it over a village, a forest, an ocean and a mountain. Measured on 2026-10-29/30 on an idle Windows 11 machine (Ryzen 7 9800X3D, RTX 5080), Horizon v0.2.97 as the launcher installs it, 1280x720 in a window, VSync off, three games per figure. Frames per second, mean of the four scenes, with the slowest 1% of frames in brackets:
| Render distance | Horizon v0.2.97 | Vanilla 26.3 | Vanilla + mods |
| --- | --- | --- | --- |
| 8 chunks | 3,289 (1,327) | 2,437 (640) | 2,375 (709) |
| 16 chunks | 2,074 (598) | 1,661 (375) | 1,586 (432) |
| 32 chunks | 1,207 (333) | 1,031 (176) | 879 (264) |
"Vanilla + mods" is Sodium, Lithium, FerriteCore and ImmediatelyFast. Horizon reaches the title screen in 2.9–3.2 s against vanilla's 7.5–7.7 s (the modded client's 10.8–11.1 s), loads a scene's chunks 2.9–3.8 times faster, and playing holds a steady working set of 1.1–1.7 GB against 1.9–2.9 GB. Every scene with its confidence interval and the run's load log: [the 2026-10-29 reports](benchmarks/perf/windows-9800x3d-5080-2026-10-29.md). Method, and how to measure your own machine: [docs/benchmark.md](docs/benchmark.md). [playhorizon.dev/benchmarks](https://playhorizon.dev/benchmarks) puts these runs beside a 2016 laptop, a Mac mini and a gaming desktop.
## Download
Get **the Horizon launcher** from [playhorizon.dev](https://playhorizon.dev), or from [the launcher releases](https://github.com/horizon-rust/horizon/releases?q=launcher&expanded=true):