etl: zero-copy memDataProvider#19780
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AskAlexSharov merged 11 commits intorelease/3.4from Mar 16, 2026
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for: #19778 ``` 10gb of files `systemd-run --user -P -t -G --wait -p MemoryMax=1G -E GOMEMLIMIT=800MiB`: `BenchmarkSortableBufferLoadOnly`: ┌─────────────┬─────────────┬──────────────┬────────────────────┐ │ Metric │ release/3.4 │ zero_copy_34 │ Delta │ ├─────────────┼─────────────┼──────────────┼────────────────────┤ │ Time/op │ ~33.9s │ ~31.7s │ -6.5% │ ├─────────────┼─────────────┼──────────────┼────────────────────┤ │ B/op (heap) │ 97.1 MB │ 0.63 MB │ -99.4% (155x less) │ ├─────────────┼─────────────┼──────────────┼────────────────────┤ │ allocs/op │ ~1,301 │ ~772 │ -40.7% │ ├─────────────┼─────────────┼──────────────┼────────────────────┤ │ Memory peak │ 4.4 MB │ 5.1 MB │ ~same │ └─────────────┴─────────────┴──────────────┴────────────────────┘ ``` ``` InMem buffer case (when we have < 32mb of data in etl collector): │ BenchmarkSortableBufferInmemLoadOnly │ 984.2 µs │ 224.4 µs │ 4.4x faster │ ```
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Cherry-pick from `release/3.4` to `main`: - #19677 agg: workers presets. ressplit workers - #19919 Revert "flush: use etl.IdentityLoadFunc instead custom. part2" - #19780 etl: zero-copy memDataProvider - #19941 d_lru: disable for commitment - #19942 TemporalMemBatch: re-use vals-slice when can - #19996 etl: pool of bufwriter - #19995 collate: replace bitmap by array - #20002 skill creator review results - #20033 seg: revert global limiter - #20046 Caplin: prevent calling `glob` per file in `BuildMissingIndices` - #20113 seg: more usage of bufio - #20194 execution/state: revert CodeSizePath in codeChange journal entry - #20431 remove `flush complete` log line - #20440 etl: munmap temp files in Dispose to prevent disk space leak 93 commits skipped due to conflicts (branches diverged significantly). --------- Co-authored-by: lystopad <oleksandr.lystopad@erigon.tech> Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com> Co-authored-by: moskud <sudeepdino008@gmail.com> Co-authored-by: info@weblogix.biz <admin@10gbps.weblogix.it>
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for: #19778