[data] Fix slow block evaluation when splitting is enabled #20693
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ericl
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ericl
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scv119
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Nov 24, 2021
clarkzinzow
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Nov 24, 2021
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Why are these changes needed?
This fixes slow lazy block evaluation by adding an explicit get_blocks() bulk method, and using that when-ever lazy iteration is not needed.
The root cause of the slowdown was because block splitting requires ray.get() during iteration over block refs, to materialize split blocks. However, this interferes with exponential rampup.
Related issue number
Closes #20625