Refactor create_hashes to accept array references #18448

adriangb · 2025-11-02T18:52:15Z

Background

This PR is part of an EPIC to push down hash table references from HashJoinExec into scans. The EPIC is tracked in #17171.

A "target state" is tracked in #18393.
There is a series of PRs to get us to this target state in smaller more reviewable changes that are still valuable on their own:

(This PR): Refactor create_hashes to accept array references #18448
Refactor InListExpr to support structs by re-using existing hashing infrastructure #18449 (depends on Refactor create_hashes to accept array references #18448)
Refactor state management in HashJoinExec and use CASE expressions for more precise filters #18451

Changes in this PR

Change create_hashes and related functions to work with &dyn Array references instead of requiring ArrayRef (Arc-wrapped arrays). This avoids unnecessary Arc::clone() calls and enables calls that only have an &dyn Array to use the hashing utilities.

Add create_hashes_from_arrays(&[&dyn Array]) function
Refactor hash_dictionary, hash_list_array, hash_fixed_list_array to use references instead of cloning
Extract hash_single_array() helper for common logic

2010YOUY01 · 2025-11-03T01:25:32Z

What is this series of PRs implementing? Is it for query anti-pattern in #18393 (comment), stat pruning is not working, so we're pushing down build-side dynamic filter like key in [1,5,23] to probe side parquet scan, and use parquet builtin bloom filter to effectively skip prunable units?

By the way I suggest to open an umbrella issue to describe the high-level ideas, now the discussion seems to be scattered around, and the work is hard to follow.

adriangb · 2025-11-03T01:29:30Z

What is this series of PRs implementing? Is it for query anti-pattern in #18393 (comment), stat pruning is not working, so we're pushing down build-side dynamic filter like key in [1,5,23] to probe side parquet scan, and use parquet builtin bloom filter to effectively skip prunable units?

Yes that is precisely it. I'm not sure what you mean by query anti-pattern though.

I'll put a summary and links to the relevant PRs in #17171 (comment). That said #17171 is already a pretty busy issue so it's buried at the bottom... I'm not sure what more I can do about that.

2010YOUY01 · 2025-11-03T01:46:41Z

What is this series of PRs implementing? Is it for query anti-pattern in #18393 (comment), stat pruning is not working, so we're pushing down build-side dynamic filter like key in [1,5,23] to probe side parquet scan, and use parquet builtin bloom filter to effectively skip prunable units?

Yes that is precisely it. I'm not sure what you mean by query anti-pattern though.

Maybe query anti-pattern is not accurate, but I'm just describing in that query, stat pruning is not working due to the given parquet file is not well clustered on the pruning column.

I'll put a summary and links to the relevant PRs in #17171 (comment). That said #17171 is already a pretty busy issue so it's buried at the bottom... I'm not sure what more I can do about that.

Perhaps edit the issue top description, or open a new one? 🤔

adriangb · 2025-11-03T05:12:05Z

Maybe query anti-pattern is not accurate, but I'm just describing in that query, stat pruning is not working due to the given parquet file is not well clustered on the pruning column.

Okay yes agreed. Anti-pattern was only confusing to me because I thought it might be suggesting that pattern of query is wrong / that the query itself is wrong and had me thinking maybe my example was a bad one 😔

I'll put a summary and links to the relevant PRs in #17171 (comment). That said #17171 is already a pretty busy issue so it's buried at the bottom... I'm not sure what more I can do about that.

Perhaps edit the issue top description, or open a new one? 🤔

Hmm there's others working on the same issue I don't want to make my work sounds like the only solution. I'll add a more extensive description and cross references to the PRs tomorrow.

datafusion/common/src/hash_utils.rs

datafusion/common/src/scalar/mod.rs

alamb

Thanks @adriangb

alamb · 2025-11-07T11:18:28Z

datafusion/common/src/hash_utils.rs

+///
+/// This is the same as [`create_hashes`] but accepts `&dyn Array`s instead of requiring
+/// `ArrayRef`s.
+pub fn create_hashes_from_arrays<'a>(


I think we can avoid this new function and instead update create_hashes with a little generics magic so it can take array references

Here is a PR that shows how it works

Use generics in create_hashes pydantic/datafusion#42

alamb · 2025-11-07T16:18:00Z

🤖 ./gh_compare_branch.sh Benchmark Script Running
Linux aal-dev 6.14.0-1018-gcp #19~24.04.1-Ubuntu SMP Wed Sep 24 23:23:09 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Comparing refactor-create-hashes (e50907a) to f57da83 diff using: tpch_mem clickbench_partitioned clickbench_extended
Results will be posted here when complete

alamb

I am somewhat biased, but this looks good to me 👍

it looks like this PR has some conflicts that need to be resolved, and I am running some benchmarks on it just to be sure it doesn't impact performance (I don't expect that it would)

alamb · 2025-11-07T16:20:16Z

datafusion/common/src/hash_utils.rs

+    Ok(())
+}
+
+pub trait AsDynArray {


Suggested change

pub trait AsDynArray {

/// Something that can be returned as a `&dyn Array`

///

/// For some reason we can't use `AsRef<dyn Array>` because

/// it is not implemented for`&dyn Array`

pub trait AsDynArray {

Co-authored-by: Andrew Lamb <[email protected]>

alamb · 2025-11-07T17:19:29Z

🤖: Benchmark completed

Details

Comparing HEAD and refactor-create-hashes
--------------------
Benchmark clickbench_extended.json
--------------------
┏━━━━━━━━━━━━━━┳━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Query        ┃        HEAD ┃ refactor-create-hashes ┃        Change ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ QQuery 0     │  2819.33 ms │             2703.99 ms │     no change │
│ QQuery 1     │  1346.83 ms │             1231.46 ms │ +1.09x faster │
│ QQuery 2     │  2609.07 ms │             2435.67 ms │ +1.07x faster │
│ QQuery 3     │  1211.65 ms │             1186.69 ms │     no change │
│ QQuery 4     │  2299.37 ms │             2274.89 ms │     no change │
│ QQuery 5     │ 28190.03 ms │            28131.02 ms │     no change │
│ QQuery 6     │  4278.94 ms │             4233.17 ms │     no change │
│ QQuery 7     │  3680.04 ms │             3565.94 ms │     no change │
└──────────────┴─────────────┴────────────────────────┴───────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┓
┃ Benchmark Summary                     ┃            ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━┩
│ Total Time (HEAD)                     │ 46435.26ms │
│ Total Time (refactor-create-hashes)   │ 45762.82ms │
│ Average Time (HEAD)                   │  5804.41ms │
│ Average Time (refactor-create-hashes) │  5720.35ms │
│ Queries Faster                        │          2 │
│ Queries Slower                        │          0 │
│ Queries with No Change                │          6 │
│ Queries with Failure                  │          0 │
└───────────────────────────────────────┴────────────┘
--------------------
Benchmark clickbench_partitioned.json
--------------------
┏━━━━━━━━━━━━━━┳━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Query        ┃        HEAD ┃ refactor-create-hashes ┃        Change ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ QQuery 0     │     2.54 ms │                2.59 ms │     no change │
│ QQuery 1     │    53.61 ms │               49.98 ms │ +1.07x faster │
│ QQuery 2     │   138.33 ms │              136.09 ms │     no change │
│ QQuery 3     │   163.42 ms │              167.28 ms │     no change │
│ QQuery 4     │  1085.80 ms │             1098.89 ms │     no change │
│ QQuery 5     │  1519.76 ms │             1508.98 ms │     no change │
│ QQuery 6     │     2.20 ms │                2.35 ms │  1.07x slower │
│ QQuery 7     │    56.16 ms │               55.42 ms │     no change │
│ QQuery 8     │  1496.60 ms │             1482.97 ms │     no change │
│ QQuery 9     │  1871.59 ms │             1861.79 ms │     no change │
│ QQuery 10    │   404.23 ms │              396.73 ms │     no change │
│ QQuery 11    │   460.52 ms │              462.95 ms │     no change │
│ QQuery 12    │  1427.43 ms │             1423.20 ms │     no change │
│ QQuery 13    │  2172.02 ms │             2197.55 ms │     no change │
│ QQuery 14    │  1311.58 ms │             1307.64 ms │     no change │
│ QQuery 15    │  1257.88 ms │             1224.69 ms │     no change │
│ QQuery 16    │  2713.32 ms │             2726.42 ms │     no change │
│ QQuery 17    │  2717.22 ms │             2718.99 ms │     no change │
│ QQuery 18    │  5374.18 ms │             5071.17 ms │ +1.06x faster │
│ QQuery 19    │   127.28 ms │              130.76 ms │     no change │
│ QQuery 20    │  2040.97 ms │             2014.82 ms │     no change │
│ QQuery 21    │  2362.71 ms │             2372.92 ms │     no change │
│ QQuery 22    │  3954.49 ms │             4025.90 ms │     no change │
│ QQuery 23    │ 13021.09 ms │            12987.25 ms │     no change │
│ QQuery 24    │   216.63 ms │              219.51 ms │     no change │
│ QQuery 25    │   505.58 ms │              519.98 ms │     no change │
│ QQuery 26    │   224.50 ms │              228.64 ms │     no change │
│ QQuery 27    │  2912.16 ms │             2954.73 ms │     no change │
│ QQuery 28    │ 24399.79 ms │            22653.71 ms │ +1.08x faster │
│ QQuery 29    │   973.57 ms │              992.15 ms │     no change │
│ QQuery 30    │  1375.06 ms │             1337.68 ms │     no change │
│ QQuery 31    │  1373.01 ms │             1359.86 ms │     no change │
│ QQuery 32    │  5146.36 ms │             4900.38 ms │     no change │
│ QQuery 33    │  6188.54 ms │             6040.24 ms │     no change │
│ QQuery 34    │  6021.22 ms │             6150.16 ms │     no change │
│ QQuery 35    │  2054.38 ms │             2037.85 ms │     no change │
│ QQuery 36    │   121.03 ms │              124.13 ms │     no change │
│ QQuery 37    │    52.00 ms │               54.16 ms │     no change │
│ QQuery 38    │   124.96 ms │              122.84 ms │     no change │
│ QQuery 39    │   199.41 ms │              201.01 ms │     no change │
│ QQuery 40    │    44.38 ms │               41.52 ms │ +1.07x faster │
│ QQuery 41    │    40.22 ms │               38.89 ms │     no change │
│ QQuery 42    │    32.40 ms │               31.84 ms │     no change │
└──────────────┴─────────────┴────────────────────────┴───────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┓
┃ Benchmark Summary                     ┃            ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━┩
│ Total Time (HEAD)                     │ 97740.14ms │
│ Total Time (refactor-create-hashes)   │ 95436.63ms │
│ Average Time (HEAD)                   │  2273.03ms │
│ Average Time (refactor-create-hashes) │  2219.46ms │
│ Queries Faster                        │          4 │
│ Queries Slower                        │          1 │
│ Queries with No Change                │         38 │
│ Queries with Failure                  │          0 │
└───────────────────────────────────────┴────────────┘
--------------------
Benchmark tpch_mem_sf1.json
--------------------
┏━━━━━━━━━━━━━━┳━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Query        ┃      HEAD ┃ refactor-create-hashes ┃        Change ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ QQuery 1     │ 203.43 ms │              169.78 ms │ +1.20x faster │
│ QQuery 2     │  31.37 ms │               26.67 ms │ +1.18x faster │
│ QQuery 3     │  45.59 ms │               37.42 ms │ +1.22x faster │
│ QQuery 4     │  35.40 ms │               28.32 ms │ +1.25x faster │
│ QQuery 5     │  83.54 ms │               77.54 ms │ +1.08x faster │
│ QQuery 6     │  20.03 ms │               19.71 ms │     no change │
│ QQuery 7     │ 226.49 ms │              223.46 ms │     no change │
│ QQuery 8     │  33.46 ms │               33.44 ms │     no change │
│ QQuery 9     │ 101.36 ms │              100.26 ms │     no change │
│ QQuery 10    │  60.46 ms │               59.33 ms │     no change │
│ QQuery 11    │  17.24 ms │               17.31 ms │     no change │
│ QQuery 12    │  51.20 ms │               51.36 ms │     no change │
│ QQuery 13    │  46.45 ms │               47.32 ms │     no change │
│ QQuery 14    │  14.43 ms │               13.73 ms │     no change │
│ QQuery 15    │  25.00 ms │               24.67 ms │     no change │
│ QQuery 16    │  25.30 ms │               24.78 ms │     no change │
│ QQuery 17    │ 150.74 ms │              147.68 ms │     no change │
│ QQuery 18    │ 328.21 ms │              321.42 ms │     no change │
│ QQuery 19    │  36.53 ms │               36.93 ms │     no change │
│ QQuery 20    │  48.61 ms │               49.59 ms │     no change │
│ QQuery 21    │ 313.76 ms │              352.03 ms │  1.12x slower │
│ QQuery 22    │  20.39 ms │               21.15 ms │     no change │
└──────────────┴───────────┴────────────────────────┴───────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━┓
┃ Benchmark Summary                     ┃           ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━┩
│ Total Time (HEAD)                     │ 1918.99ms │
│ Total Time (refactor-create-hashes)   │ 1883.92ms │
│ Average Time (HEAD)                   │   87.23ms │
│ Average Time (refactor-create-hashes) │   85.63ms │
│ Queries Faster                        │         5 │
│ Queries Slower                        │         1 │
│ Queries with No Change                │        16 │
│ Queries with Failure                  │         0 │
└───────────────────────────────────────┴───────────┘

adriangb · 2025-11-07T17:25:14Z

QQuery 4 │ 35.40 ms │ 28.32 ms │ +1.25x faster

No way this is real 😆

But generally benches look good! Either an improvement or no change + noise. So I will merge this once CI passes. Thank you @alamb and @martin-g !

alamb · 2025-11-07T17:57:13Z

I'll reschedule to double check (no need to wait for merge)

alamb · 2025-11-07T18:46:27Z

🤖 ./gh_compare_branch.sh Benchmark Script Running
Linux aal-dev 6.14.0-1018-gcp #19~24.04.1-Ubuntu SMP Wed Sep 24 23:23:09 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Comparing refactor-create-hashes (976d2cd) to f32984b diff using: tpch_mem clickbench_partitioned clickbench_extended
Results will be posted here when complete

alamb · 2025-11-07T19:44:38Z

🤖: Benchmark completed

Details

Comparing HEAD and refactor-create-hashes
--------------------
Benchmark clickbench_extended.json
--------------------
┏━━━━━━━━━━━━━━┳━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Query        ┃        HEAD ┃ refactor-create-hashes ┃        Change ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ QQuery 0     │  2689.38 ms │             2698.70 ms │     no change │
│ QQuery 1     │  1266.59 ms │             1174.60 ms │ +1.08x faster │
│ QQuery 2     │  2431.84 ms │             2308.15 ms │ +1.05x faster │
│ QQuery 3     │  1180.08 ms │             1166.20 ms │     no change │
│ QQuery 4     │  2338.77 ms │             2342.68 ms │     no change │
│ QQuery 5     │ 28232.41 ms │            28359.58 ms │     no change │
│ QQuery 6     │  4076.58 ms │             4209.84 ms │     no change │
│ QQuery 7     │  3774.99 ms │             3640.46 ms │     no change │
└──────────────┴─────────────┴────────────────────────┴───────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┓
┃ Benchmark Summary                     ┃            ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━┩
│ Total Time (HEAD)                     │ 45990.64ms │
│ Total Time (refactor-create-hashes)   │ 45900.21ms │
│ Average Time (HEAD)                   │  5748.83ms │
│ Average Time (refactor-create-hashes) │  5737.53ms │
│ Queries Faster                        │          2 │
│ Queries Slower                        │          0 │
│ Queries with No Change                │          6 │
│ Queries with Failure                  │          0 │
└───────────────────────────────────────┴────────────┘
--------------------
Benchmark clickbench_partitioned.json
--------------------
┏━━━━━━━━━━━━━━┳━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Query        ┃        HEAD ┃ refactor-create-hashes ┃        Change ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ QQuery 0     │     2.09 ms │                2.16 ms │     no change │
│ QQuery 1     │    48.82 ms │               49.36 ms │     no change │
│ QQuery 2     │   135.54 ms │              136.99 ms │     no change │
│ QQuery 3     │   161.07 ms │              161.90 ms │     no change │
│ QQuery 4     │  1067.97 ms │             1083.90 ms │     no change │
│ QQuery 5     │  1534.15 ms │             1498.98 ms │     no change │
│ QQuery 6     │     2.25 ms │                2.16 ms │     no change │
│ QQuery 7     │    55.18 ms │               52.41 ms │ +1.05x faster │
│ QQuery 8     │  1465.53 ms │             1504.45 ms │     no change │
│ QQuery 9     │  1841.30 ms │             1845.58 ms │     no change │
│ QQuery 10    │   379.08 ms │              415.64 ms │  1.10x slower │
│ QQuery 11    │   433.01 ms │              430.40 ms │     no change │
│ QQuery 12    │  1361.46 ms │             1380.62 ms │     no change │
│ QQuery 13    │  2161.80 ms │             2172.71 ms │     no change │
│ QQuery 14    │  1274.98 ms │             1286.97 ms │     no change │
│ QQuery 15    │  1262.96 ms │             1294.72 ms │     no change │
│ QQuery 16    │  2679.92 ms │             2719.24 ms │     no change │
│ QQuery 17    │  2669.17 ms │             2716.97 ms │     no change │
│ QQuery 18    │  5423.51 ms │             5101.51 ms │ +1.06x faster │
│ QQuery 19    │   127.86 ms │              126.39 ms │     no change │
│ QQuery 20    │  2052.11 ms │             1997.13 ms │     no change │
│ QQuery 21    │  2335.79 ms │             2308.85 ms │     no change │
│ QQuery 22    │  4031.93 ms │             3970.47 ms │     no change │
│ QQuery 23    │ 18894.65 ms │            12739.39 ms │ +1.48x faster │
│ QQuery 24    │   215.78 ms │              221.49 ms │     no change │
│ QQuery 25    │   472.47 ms │              474.05 ms │     no change │
│ QQuery 26    │   231.23 ms │              223.57 ms │     no change │
│ QQuery 27    │  2869.59 ms │             2801.37 ms │     no change │
│ QQuery 28    │ 24514.24 ms │            23298.88 ms │     no change │
│ QQuery 29    │   968.25 ms │             1005.67 ms │     no change │
│ QQuery 30    │  1377.51 ms │             1353.31 ms │     no change │
│ QQuery 31    │  1400.71 ms │             1387.23 ms │     no change │
│ QQuery 32    │  4947.96 ms │             4891.28 ms │     no change │
│ QQuery 33    │  6123.77 ms │             5958.08 ms │     no change │
│ QQuery 34    │  6316.95 ms │             6037.89 ms │     no change │
│ QQuery 35    │  2116.60 ms │             2080.72 ms │     no change │
│ QQuery 36    │   124.64 ms │              119.78 ms │     no change │
│ QQuery 37    │    53.84 ms │               50.95 ms │ +1.06x faster │
│ QQuery 38    │   121.04 ms │              121.65 ms │     no change │
│ QQuery 39    │   198.78 ms │              196.94 ms │     no change │
│ QQuery 40    │    42.56 ms │               43.73 ms │     no change │
│ QQuery 41    │    40.12 ms │               39.06 ms │     no change │
│ QQuery 42    │    32.79 ms │               32.41 ms │     no change │
└──────────────┴─────────────┴────────────────────────┴───────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━┓
┃ Benchmark Summary                     ┃             ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━┩
│ Total Time (HEAD)                     │ 103570.96ms │
│ Total Time (refactor-create-hashes)   │  95336.96ms │
│ Average Time (HEAD)                   │   2408.63ms │
│ Average Time (refactor-create-hashes) │   2217.14ms │
│ Queries Faster                        │           4 │
│ Queries Slower                        │           1 │
│ Queries with No Change                │          38 │
│ Queries with Failure                  │           0 │
└───────────────────────────────────────┴─────────────┘
--------------------
Benchmark tpch_mem_sf1.json
--------------------
┏━━━━━━━━━━━━━━┳━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━┓
┃ Query        ┃      HEAD ┃ refactor-create-hashes ┃        Change ┃
┡━━━━━━━━━━━━━━╇━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━┩
│ QQuery 1     │ 141.11 ms │              130.63 ms │ +1.08x faster │
│ QQuery 2     │  27.70 ms │               28.69 ms │     no change │
│ QQuery 3     │  38.77 ms │               38.14 ms │     no change │
│ QQuery 4     │  28.88 ms │               28.69 ms │     no change │
│ QQuery 5     │  87.27 ms │               85.02 ms │     no change │
│ QQuery 6     │  19.61 ms │               19.61 ms │     no change │
│ QQuery 7     │ 223.10 ms │              220.34 ms │     no change │
│ QQuery 8     │  38.74 ms │               34.68 ms │ +1.12x faster │
│ QQuery 9     │ 112.03 ms │               99.91 ms │ +1.12x faster │
│ QQuery 10    │  63.74 ms │               62.85 ms │     no change │
│ QQuery 11    │  18.17 ms │               17.09 ms │ +1.06x faster │
│ QQuery 12    │  52.78 ms │               50.13 ms │ +1.05x faster │
│ QQuery 13    │  47.38 ms │               46.39 ms │     no change │
│ QQuery 14    │  13.73 ms │               14.08 ms │     no change │
│ QQuery 15    │  24.81 ms │               24.91 ms │     no change │
│ QQuery 16    │  24.98 ms │               24.85 ms │     no change │
│ QQuery 17    │ 152.79 ms │              148.86 ms │     no change │
│ QQuery 18    │ 281.32 ms │              278.54 ms │     no change │
│ QQuery 19    │  38.06 ms │               38.35 ms │     no change │
│ QQuery 20    │  49.75 ms │               50.24 ms │     no change │
│ QQuery 21    │ 337.78 ms │              325.47 ms │     no change │
│ QQuery 22    │  21.12 ms │               21.31 ms │     no change │
└──────────────┴───────────┴────────────────────────┴───────────────┘
┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━┓
┃ Benchmark Summary                     ┃           ┃
┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━┩
│ Total Time (HEAD)                     │ 1843.61ms │
│ Total Time (refactor-create-hashes)   │ 1788.80ms │
│ Average Time (HEAD)                   │   83.80ms │
│ Average Time (refactor-create-hashes) │   81.31ms │
│ Queries Faster                        │         5 │
│ Queries Slower                        │         0 │
│ Queries with No Change                │        17 │
│ Queries with Failure                  │         0 │
└───────────────────────────────────────┴───────────┘

alamb · 2025-11-07T21:09:45Z

it is strange that the second run also shows speedups. I agree that overall it looks good to me and shipping is the right solution here

adriangb · 2025-11-07T21:16:39Z

Not the same speedups / in the same queries though. I think it's just noise. Unfortunate that noise is +-25%...

alamb · 2025-11-08T09:39:27Z

Not the same speedups / in the same queries though. I think it's just noise. Unfortunate that noise is +-25%...

Yeah, I agree

FYI @rluvaton had a great idea here:

Automated way to run benchmarks on a dedicated machine from PRs #18115

github-actions bot added physical-expr Changes to the physical-expr crates common Related to common crate physical-plan Changes to the physical-plan crate labels Nov 2, 2025

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Refactor InListExpr to support structs by re-using existing hashing infrastructure #18449

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Push down InList or hash table references from HashJoinExec depending on the size of the build side #18393

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Push down entire hash table from HashJoinExec into scans #17171

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Refactor state management in HashJoinExec and use CASE expressions for more precise filters #18451

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Andrew Lamb Weekly-ish Open Source plan - 2025-11-03 #18486

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Use generics in create_hashes pydantic/datafusion#42

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Refactor create_hashes to accept array references

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Co-authored-by: Andrew Lamb <[email protected]>

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add docstring

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-pub trait AsDynArray {
+/// Something that can be returned as a `&dyn Array`
+///
+/// For some reason we can't use `AsRef<dyn Array>` because
+/// it is not implemented for`&dyn Array`
+pub trait AsDynArray {

Refactor create_hashes to accept array references #18448

Refactor create_hashes to accept array references #18448

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