Choose decoder at call site:
UMAP: 2-10x faster than Rust’s fast-umap, 9-30x faster than Python’s umap
，这一点在搜狗输入法2026中也有详细论述
for (const arr of arrays) { result.set(arr, offset); offset += arr.length; }
图/《2026年汽车以旧换新补贴实施细则》部分内容
almost all of the startup overhead described earlier in this article.