Compare primitive values with RowFn

[connortsui20]

Depends on #10014.

Summary

• Tracking Issue: Epic: Row-oriented scalar functions #9128
• Replaces Compare primitive values with RowFn #9703 under the renamed branch. The original discussion remains there.

Moves primitive comparisons onto RowFn so decoding, constants, validity, and packed Boolean output use the shared row executor.

Changes

PrimitiveCompare dispatches primitive types and comparison operators through multiversioned RowVisitor::visit_bool, replacing the primitive lane kernels and their operand wrapper. Float comparisons retain Vortex's total ordering.

Depends on #10014 for execution-allocator ownership of Boolean output. The comparison tests added in #9948 are retained and now exercise the RowFn implementation.

Validation before the rebase: 168 focused comparison, mask, and RowFn tests passed on the combined stack, including comparison_uses_execution_allocator, along with cargo clippy -p vortex-array --all-targets --all-features -- -D warnings. Tests, formatting, and benchmarks were not rerun locally after the rebase.

[codspeed]

Merging this PR will degrade performance by 11.94%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚠️ 3 benchmarks measured no execution time

Nothing ran under measurement, usually because the compiler removed the code under test. These results are not comparable, so they count as unchanged.

Preventing compiler optimizations

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 7 improved benchmarks
❌ 40 regressed benchmarks
✅ 2133 untouched benchmarks
⏩ 385 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	WallTime	mul_u64_nonnull_neon	28.7 µs	40.6 µs	-29.4%
❌	WallTime	lt_i64_nullable_avx512	2.8 µs	3.9 µs	-27.98%
❌	WallTime	lt_i64_nullable_neon	3.6 µs	5 µs	-27.03%
❌	WallTime	lt_i64_nullable_avx2	2.9 µs	4 µs	-26.95%
❌	WallTime	compare_u8_avx512	1.7 µs	2.1 µs	-22.15%
❌	WallTime	filtered_owned_i64_avx2[OneNullInEight]	21.8 µs	27.6 µs	-20.93%
❌	WallTime	compare_int_nullable_avx512	3.7 µs	4.6 µs	-20.02%
❌	WallTime	compare_int_nullable_neon	5.1 µs	6.4 µs	-19.93%
❌	WallTime	filtered_owned_i64_avx512[OneNullInEight]	22.3 µs	27.8 µs	-19.76%
❌	WallTime	compare_u8_avx2	1.8 µs	2.2 µs	-19.16%
❌	Simulation	int_gt[16]	100.9 µs	123.8 µs	-18.5%
❌	Simulation	or_chain[16]	342.9 µs	414.1 µs	-17.19%
❌	WallTime	multiply_shapes_neon[(32768, PerRowPerRow)]	32.5 µs	39.2 µs	-17.09%
❌	WallTime	compare_int_nullable_avx2	3.9 µs	4.7 µs	-16.94%
❌	WallTime	compare_u8_neon	2.2 µs	2.6 µs	-16.77%
❌	WallTime	mul_i64_nonnull_neon	32.6 µs	39.2 µs	-16.68%
❌	Simulation	baseline_lt[4, 1024]	75.1 µs	89.8 µs	-16.41%
❌	Simulation	int_gt[1024]	106.8 µs	127.5 µs	-16.29%
❌	Simulation	bench_compare_sliced_dict_primitive[(3333, 10000)]	76.9 µs	91.7 µs	-16.07%
❌	Simulation	or_chain[1024]	359.5 µs	428.2 µs	-16.05%
...	...	...	...	...	...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

---

_{Comparing ct/row-fn-compare-primitive (c2e7937) with develop (e88216e)²}

Footnotes

1. 385 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on develop (0ff150e) during the generation of this report, so e88216e was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩