kaijchen opened a new pull request, #35524:
URL: https://github.com/apache/doris/pull/35524
## Proposed changes
In most common cases, columns in `slot_descs` and `tuple_desc->slots()` will
match and we don't need convert `input_block` in `MemTable::insert()`.
For materialized views, `input_block` will be converted by `_column_offset`
as intended, see #9923.
To optimize performance in cases with many (e.g. 12k+) tablets:
Before:
```
- DeltaWriterWriteTime: 1m58s
- MemTableWriterFlushTime: 0ns
- MemTableWriterLockTime: 1s41ms
- MemTableWriterShrinkTime: 0ns
- MemTableWriterWriteTime: 1m53s
- MemTableCopyCount: 12.044003M
(12044003)
- MemTableCopyTime: 42s857ms
- MemTableCopyTime0: 11s866ms
- MemTableInitTime: 13.384ms
- MemTableInsertTime: 51s543ms
```
After:
```
- DeltaWriterWriteTime: 1m
- MemTableWriterFlushTime: 0ns
- MemTableWriterLockTime: 971.481ms
- MemTableWriterShrinkTime: 0ns
- MemTableWriterWriteTime: 55s274ms
- MemTableCopyCount: 0
- MemTableCopyTime: 0ns
- MemTableCopyTime0: 0ns
- MemTableInitTime: 18.746ms
- MemTableInsertTime: 53s772ms
```
## Further comments
If this is a relatively large or complex change, kick off the discussion at
[[email protected]](mailto:[email protected]) by explaining why you
chose the solution you did and what alternatives you considered, etc...
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