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Fuse in case of multiple arrays derived from one source array via blockwise ops #126

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tomwhite opened this issue Sep 12, 2022 · 2 comments
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Fuse in case of multiple arrays derived from one source array via blockwise ops #126

tomwhite opened this issue Sep 12, 2022 · 2 comments
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core optimization

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@tomwhite
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This was raised in #117 (comment).

An example (from test_no_fusion) is:

a = ...
b = +a
c = +b
b == c

It has the following DAG:

cubed

It should be possible to fuse all the blockwise operations into one.

This is reminiscent of ParallelDo Fusion in FlumeJava (a predecessor to Beam).
@tomwhite
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To do this generally needs the ability to write multiple outputs (#69).

@TomNicholas TomNicholas mentioned this issue Jun 5, 2023
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@tomwhite
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This was implemented in #346 and made the default in #412

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@tomwhite