JPEG

Tune your C code's hidden constants for sharper results on real-world data

Tuning constants in compiled C code usually means recompiling from source. LearnC sidesteps that entirely. It adjusts named constants directly in unmodified C files against a custom score function, then writes the updated values back. The results speak for themselves: a 9.1% BD-rate improvement on JPEG quantization tables and a significant F1 boost for Google's WebRTC VAD. This is a practical, focused tool for squeezing real-world performance out of existing codebases. For more on iterative model improvements, see our coverage of the Looped Diffusion Transformer.