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possible optimization to backprop; instead of creating functions, re-…#17

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autonull wants to merge 3 commits into
karpathy:masterfrom
deepstupid:master
Open

possible optimization to backprop; instead of creating functions, re-…#17
autonull wants to merge 3 commits into
karpathy:masterfrom
deepstupid:master

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@autonull

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…use existing functions with different arguments

the main part i am sharing is the method of queing backprop functions. i suspect that this might be less expensive than creating new function instances. needs verified with a profiler

(sorry i used a IDE reformat on the code so it will look like everything was modified.)

@raimannma

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very good

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