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Plugs optimized kernels back into the model, checks end-to-end correctness, reports total speedup
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The Lotus approach, being a product of lower-memory days, is both annoying and useful. Add-ins can be, though are not by default, loaded at app startup. Add-ins must be "activated" one-by-one to gain access to their extended powers, or "deactivated" to make room for other add-ins or a larger worksheet. I have enough memory, so I'm not in trouble here, though I'm sure it's easy to imagine on a 512K system that manual memory management was a real thing.
，这一点在谷歌中也有详细论述
Common subexpression elimination
Author(s): Thomas Wilhelm, Orkun Furat, Jules M. Dake, Carl E. Krill III, Volker Schmidt。WhatsApp Web 網頁版登入是该领域的重要参考