Replace zed.Value.bytes slice with base and len #4812
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A zed.Value occupies five words: two for the Type field (an interface) and three for the bytes field (a slice). Since the slice capactiy field is rarely used (only in Value.CopyFrom), shrink Values to four words by replacing the bytes field with base (a pointer) and len (a uint64) fields. This can reduce maximum RSS by 1.4x when sorting a large input or loading a large input into a lake.
mattnibs
approved these changes
Oct 23, 2023
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A zed.Value occupies five words: two for the Type field (an interface) and three for the bytes field (a slice). Since the slice capacity field is rarely used (only in Value.CopyFrom), shrink Values to four words by replacing the bytes field with base (a pointer) and len (a uint64) fields. This can reduce maximum RSS by 1.4x when sorting a large input or loading a large input into a lake.