Slice list/list_view elements in duckdb exporter#8020
Merged
Conversation
myrrc
added
changelog/performance
github-actions
Bot
removed
the
action/benchmark-sql
Contributor
Polar Signals Profiling ResultsLatest Run
Previous Runs (1)
Powered by Polar Signals Cloud |
Contributor
Benchmarks: PolarSignals ProfilingVortex (geomean): 0.932x ➖ datafusion / vortex-file-compressed (0.932x ➖, 2↑ 0↓)
|
Contributor
File Sizes: PolarSignals ProfilingNo file size changes detected. |
Contributor
Benchmarks: FineWeb NVMeVerdict: No clear signal (low confidence) datafusion / vortex-file-compressed (0.955x ➖, 1↑ 0↓)
datafusion / vortex-compact (0.961x ➖, 0↑ 0↓)
datafusion / parquet (0.926x ➖, 2↑ 0↓)
duckdb / vortex-file-compressed (0.944x ➖, 3↑ 0↓)
duckdb / vortex-compact (0.974x ➖, 0↑ 0↓)
duckdb / parquet (0.952x ➖, 1↑ 0↓)
Full attributed analysis
|
Contributor
File Sizes: FineWeb NVMeNo file size changes detected. |
Contributor
Benchmarks: TPC-H SF=1 on NVMEVerdict: No clear signal (low confidence) datafusion / vortex-file-compressed (0.941x ➖, 1↑ 0↓)
datafusion / vortex-compact (0.950x ➖, 0↑ 0↓)
datafusion / parquet (0.967x ➖, 0↑ 0↓)
datafusion / arrow (0.930x ➖, 2↑ 0↓)
duckdb / vortex-file-compressed (0.967x ➖, 0↑ 0↓)
duckdb / vortex-compact (0.958x ➖, 1↑ 0↓)
duckdb / parquet (0.973x ➖, 2↑ 0↓)
duckdb / duckdb (0.979x ➖, 0↑ 0↓)
Full attributed analysis
|
Contributor
File Sizes: TPC-H SF=1 on NVMENo file size changes detected. |
Contributor
Benchmarks: TPC-DS SF=1 on NVMEVerdict: No clear signal (low confidence) datafusion / vortex-file-compressed (0.997x ➖, 0↑ 1↓)
datafusion / vortex-compact (0.989x ➖, 2↑ 0↓)
datafusion / parquet (1.003x ➖, 1↑ 2↓)
duckdb / vortex-file-compressed (1.001x ➖, 1↑ 1↓)
duckdb / vortex-compact (0.995x ➖, 2↑ 0↓)
duckdb / parquet (1.003x ➖, 0↑ 2↓)
duckdb / duckdb (0.998x ➖, 0↑ 2↓)
Full attributed analysis
|
Contributor
File Sizes: TPC-DS SF=1 on NVMENo file size changes detected. |
Contributor
Benchmarks: Statistical and Population GeneticsVerdict: Likely improvement (low confidence) duckdb / vortex-file-compressed (0.751x ✅, 4↑ 0↓)
duckdb / vortex-compact (0.787x ✅, 4↑ 0↓)
duckdb / parquet (0.990x ➖, 0↑ 0↓)
Full attributed analysis
|
Contributor
Benchmarks: FineWeb S3Verdict: No clear signal (environment too noisy confidence) datafusion / vortex-file-compressed (1.135x ➖, 0↑ 3↓)
datafusion / vortex-compact (1.053x ➖, 0↑ 1↓)
datafusion / parquet (1.204x ➖, 0↑ 3↓)
duckdb / vortex-file-compressed (1.104x ➖, 0↑ 0↓)
duckdb / vortex-compact (1.107x ➖, 0↑ 1↓)
duckdb / parquet (1.041x ➖, 0↑ 0↓)
Full attributed analysis
|
Contributor
Benchmarks: TPC-H SF=10 on NVMEVerdict: No clear signal (low confidence) datafusion / vortex-file-compressed (0.940x ➖, 1↑ 0↓)
datafusion / vortex-compact (0.934x ➖, 0↑ 0↓)
datafusion / parquet (0.939x ➖, 0↑ 0↓)
datafusion / arrow (0.887x ✅, 15↑ 0↓)
duckdb / vortex-file-compressed (0.934x ➖, 3↑ 0↓)
duckdb / vortex-compact (0.957x ➖, 0↑ 0↓)
duckdb / parquet (0.957x ➖, 0↑ 0↓)
duckdb / duckdb (0.971x ➖, 0↑ 0↓)
Full attributed analysis
|
Contributor
File Sizes: TPC-H SF=10 on NVMENo file size changes detected. |
Contributor
Benchmarks: Clickbench on NVMEVerdict: No clear signal (low confidence) datafusion / vortex-file-compressed (1.008x ➖, 2↑ 2↓)
datafusion / parquet (1.009x ➖, 0↑ 0↓)
duckdb / vortex-file-compressed (1.006x ➖, 1↑ 0↓)
duckdb / parquet (1.004x ➖, 0↑ 0↓)
duckdb / duckdb (0.995x ➖, 1↑ 4↓)
Full attributed analysis
|
Contributor
File Sizes: Clickbench on NVMEFile Size Changes (1 files changed, -0.0% overall, 0↑ 1↓)
Totals:
|
Contributor
Benchmarks: TPC-H SF=1 on S3Verdict: No clear signal (environment too noisy confidence) datafusion / vortex-file-compressed (1.080x ➖, 0↑ 3↓)
datafusion / vortex-compact (1.115x ➖, 0↑ 4↓)
datafusion / parquet (1.245x ➖, 0↑ 7↓)
duckdb / vortex-file-compressed (1.051x ➖, 0↑ 0↓)
duckdb / vortex-compact (1.064x ➖, 0↑ 0↓)
duckdb / parquet (1.077x ➖, 0↑ 0↓)
Full attributed analysis
|
0ax1
reviewed
May 19, 2026
Contributor
Benchmarks: TPC-H SF=10 on S3Verdict: No clear signal (environment too noisy confidence) datafusion / vortex-file-compressed (1.173x ➖, 0↑ 3↓)
datafusion / vortex-compact (1.065x ➖, 0↑ 1↓)
datafusion / parquet (1.158x ➖, 0↑ 5↓)
duckdb / vortex-file-compressed (1.058x ➖, 0↑ 0↓)
duckdb / vortex-compact (1.038x ➖, 0↑ 0↓)
duckdb / parquet (1.102x ➖, 0↑ 0↓)
Full attributed analysis
|
0ax1
reviewed
May 19, 2026
0ax1
reviewed
May 19, 2026
myrrc
force-pushed
the
myrrc/duckdb-list-exporter-slice
branch
from
f091924 to
3f54aff
Compare
github-actions
Bot
removed
the
action/benchmark-sql
| let offset = offsets[i] | ||
| .to_u64() | ||
| .ok_or_else(|| vortex_err!("somehow unable to convert an offset to u64"))?; | ||
| .ok_or_else(|| vortex_err!("conversion failed)"))?; |
Contributor
There was a problem hiding this comment.
these error will be slower and you really don't need them twice? (or even once??)
Contributor
File Sizes: Statistical and Population GeneticsNo file size changes detected. |
0ax1
reviewed
May 19, 2026
myrrc
force-pushed
the
myrrc/duckdb-list-exporter-slice
branch
from
3f54aff to
54f5efc
Compare
Merging this PR will improve performance by 16.48%
|
| Mode | Benchmark | BASE |
HEAD |
Efficiency | |
|---|---|---|---|---|---|
| ⚡ | Simulation | chunked_varbinview_canonical_into[(100, 100)] |
308 µs | 272.9 µs | +12.86% |
| ⚡ | Simulation | chunked_varbinview_canonical_into[(1000, 10)] |
197.8 µs | 162 µs | +22.09% |
| ⚡ | Simulation | chunked_varbinview_into_canonical[(100, 100)] |
358.5 µs | 323.5 µs | +10.82% |
| ⚡ | Simulation | chunked_varbinview_into_canonical[(1000, 10)] |
211.9 µs | 175.8 µs | +20.55% |
Tip
Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.
Comparing myrrc/duckdb-list-exporter-slice (54f5efc) with develop (8aaaab8)
0ax1
approved these changes
May 19, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
3 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
We always reference the underlying vector for every list/list_view chunk
export. This means, for a 1M vector and export of first element, the underlying
vector would still be 1M.
This PR slices the underlying vector for list and list views exporter to only
contain requested elements by offsets.