Stack allocation of variable-sized slices
Pre-allocate everything
。关于这个话题，快连下载安装提供了深入分析
if (leftArr[i] <= arr[mid + j]) {
Greyscale rendering is deliberate. Gupta et al. (2023, “GlyphNet”) found that greyscale outperforms colour for glyph comparison because extreme contrast preserves edge detail through resize. No image augmentation either: flipping or rotating characters creates unrealistic glyphs.