Speeding Up Image Filters with APL's Stencil Operator (⌺) – A Practical Guide
Learn how APL’s stencil operator (⌺) can accelerate image filters and numerical kernels. This guide covers its semantics, boundary options, a Sobel example, performance tips, and trade‑offs. Ideal for developers moving from naive each/rank to efficient, tiled stencil code.
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