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0b288c0f08
Reduce CPU overhead in display update loops by caching computed values: - Cache data_mask_ and clock_ pin masks during setup() instead of recomputing them in every display function call - Optimize hscan_start_() by using cached values instead of calling get_data_pin_mask_() on every row - Cache height, width_bytes, buffer_len at start of display functions to avoid repeated virtual function calls in tight loops - Precompute LUT base pointers in display3b_() to avoid k*256 index calculations in inner loop - Hoist model checks (is_6_plus, needs_last_clock) outside loops to reduce branching in performance-critical paths These optimizations reduce function call overhead and redundant calculations in the display update paths, which are executed for every pixel row during screen refresh.
