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# System prepended metadata

title: Design meeting 2022-01-20

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# Design meeting 2022-01-20

## Fusion PR
https://github.com/pymc-devs/pytensor/pull/121

Looks great!
Using a greedy algorithm, which might not always make the best choices for merging.
 - Might want to be more picky about what Ops to fuse

Changes the representation to show the inner graph below.
 - Debug printing is a bit weird, maybe show inner graph only once

There are some additional opportunities for merging.
- Indepedent Composites that share some inputs


Needs review

## Loop PR
https://github.com/pymc-devs/pytensor/pull/191


