[04:10:45] <k_sze[work]> Does Pillow use a fast routine in C to convert from YCbCr to RGB?
[04:11:06] <k_sze[work]> I mean, when I call Image.convert("RGB").
[04:11:18] <k_sze[work]> And my image is originally in YCbCr.
[04:18:40] <k_sze[work]> hmm, I see this: https://github.com/python-pillow/Pillow/blob/d3727b523ece4f75def72bfc960e1abd104b5dcb/libImaging/ConvertYCbCr.c#L364