perf(sort): passthrough last stream that left in SortPreservingMergeStream#23328
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rluvaton wants to merge 2 commits into
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perf(sort): passthrough last stream that left in SortPreservingMergeStream#23328rluvaton wants to merge 2 commits into
SortPreservingMergeStream#23328rluvaton wants to merge 2 commits into
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Which issue does this PR close?
N/A
Rationale for this change
No need to go through the entire Loser tree mechanism when only 1 stream left, so in that case, just passthrough last stream
What changes are included in this PR?
added passthrough for last stream in
SortPreservingMergeStreamAre these changes tested?
Yes, basic test + existing tests
Are there any user-facing changes?
No
FYI, this is one of many upcoming optimizations that I will do for Sort