feat[venom]: improve liveness computation time #4086
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reduce time spent in liveness by starting from the leaves of the DFS, and only recomputing liveness for basic blocks which need it (any of its cfg_out has changed).
harkal
approved these changes
Jun 3, 2024
harkal
approved these changes
Sep 18, 2024
charles-cooper
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Oct 5, 2024
reduce time spent in liveness by only recomputing liveness for basic blocks which need it (any of its `cfg_out` has changed). reduces time in venom by roughly 25% there is also a slight codesize improvement. it seems to be sensitive to the order in which items are added to the worklist.
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What I did
reduce time spent in liveness by only recomputing liveness for basic blocks which need it (any of its cfg_out has changed).
reduces time in venom by 25% (e.g. CurveStableSwapNG-0.4.0.vy goes from 1.3s spent in venom to 1s).
there is also a slight codesize improvement. it seems to be sensitive to the order in which items are added to the worklist.
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