Éist research · 2026-09-15-v1
Kokoro performance in Éist
Kokoro through sherpa-onnx 1.12.40, fp32 model, cache version 5. The separate iOS Metal result is labelled Kokoro Turbo. These are observational results from Éist installations with analytics enabled, not a general benchmark of every Kokoro implementation.
Platform summary
Kokoro on android
3.48 RTF
p10–p90: 2.326–5.258
63 installations · 1,998 active health samples
Éist 1.3.21 · kokoro-v5-fp32-sherpa-1.12.40
Kokoro on ios
1.325 RTF
p10–p90: 0.868–2.322
59 installations · 5,614 active health samples
Éist 1.3.19 · kokoro-v5-fp32-sherpa-1.12.40
Kokoro Turbo on ios
0.438 RTF
p10–p90: 0.227–0.672
105 installations · 2,602 active health samples
Éist 1.3.19 · kokoro-fast-v3-mlx-bf16
Qualifying device cohorts
Only cohorts with at least 100 active health samples and 10 installations appear. Lower RTF is faster.
| Engine | Device | Observed OS | Median RTF | p10–p90 | Installations | Health samples |
|---|---|---|---|---|---|---|
| Kokoro Turbo | iPhone17,1 | iOS 18.7.8–27.0 | 0.469 | 0.333–0.673 | 12 | 275 |
| Kokoro Turbo | iPhone16,1 | iOS 26.5–26.6.2 | 0.5 | 0.379–0.75 | 10 | 285 |