feat[gpu]: sliced validity in Arrow device export

[0ax1]

No description provided.

[codspeed-hq]

Merging this PR will not alter performance

⚠️ 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 improved benchmarks
❌ 3 regressed benchmarks
✅ 1521 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	bitwise_not_vortex_buffer_mut[128]	216.9 ns	275.3 ns	-21.19%
❌	Simulation	bitwise_not_vortex_buffer_mut[1024]	278.6 ns	336.9 ns	-17.31%
❌	Simulation	bitwise_not_vortex_buffer_mut[2048]	342.2 ns	400.6 ns	-14.56%
⚡	Simulation	chunked_bool_canonical_into[(1000, 10)]	46.8 µs	31.9 µs	+46.83%
⚡	Simulation	chunked_varbinview_canonical_into[(1000, 10)]	198.2 µs	162 µs	+22.31%
⚡	Simulation	chunked_varbinview_into_canonical[(1000, 10)]	213.4 µs	177.2 µs	+20.41%

Tip

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

---

_{Comparing ad/sliced-varbinview-e2e (f8d19e7) with develop (031fb76)}

[0ax1]

GH 200:

┌───────────────────────────────────────────────────────────────┬───────────────┬────────────┬─────────────┬─────────────┐
│                        Kernel variant                         │ Time (median) │ Throughput │ Step change │ vs baseline │
├───────────────────────────────────────────────────────────────┼───────────────┼────────────┼─────────────┼─────────────┤
│ Bit-by-bit, byte writes (PR baseline)                         │      140.3 µs │   178 GB/s │           — │        1.0× │
├───────────────────────────────────────────────────────────────┼───────────────┼────────────┼─────────────┼─────────────┤
│ u64 funnel-shift words, blocked ranges (start_elem/stop_elem) │       39.0 µs │   641 GB/s │      −72.2% │        3.6× │
├───────────────────────────────────────────────────────────────┼───────────────┼────────────┼─────────────┼─────────────┤
│ + grid-stride loop (coalesced warp accesses)                  │       26.9 µs │   929 GB/s │      −31.2% │        5.2× │
├───────────────────────────────────────────────────────────────┼───────────────┼────────────┼─────────────┼─────────────┤
│ + 256 threads/block, one word per thread                      │       21.0 µs │  1.19 TB/s │      −21.8% │        6.7× │
└───────────────────────────────────────────────────────────────┴───────────────┴────────────┴─────────────┴─────────────┘