Reduce memory consumption using lightweight references #1370
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This was referenced Nov 10, 2024
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Prework
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Summary
This PR reduces the memory consumption of
targetswhenmemoryis"transient"by storing dynamic branches as compact references where possible. Testing the pipeline at #1368 (comment) withtar_option_set(memory = "transient")reduced max memory down to 476 MB. Usingcrewit went up to 668 MB, but inspecting withlobstrrevealed that the pipeline object itself consumed less than 100 MB, and the whole R session was only around 200 MB or so, which is a huge improvement.