Expose slots, dtype, len and is_empty on TypedArrayRef

[robert3005]

Extension traits over TypedArrayRef had to go through self.as_ref() to
reach the backing ArrayRef for slots, dtype and length. Add these
accessors to TypedArrayRef so the extension traits can call
self.slots(), self.dtype() and self.len() directly.

[codspeed]

Merging this PR will degrade performance by 23.78%

⚠️ 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.

⚠️ 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

❌ 5 regressed benchmarks
✅ 2170 untouched benchmarks
⏩ 534 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	density_sweep_dense_runs[0.001]	30.2 µs	48.1 µs	-37.24%
❌	Simulation	filter_powerlaw_by_mostly_true[250000]	104 µs	150.4 µs	-30.84%
❌	Simulation	take[routing/same_chunk/primitive/nonnull/chunks=32/indices=1000]	176 µs	222.5 µs	-20.86%
❌	Simulation	sum_i64	194.3 µs	225.2 µs	-13.73%
❌	Simulation	sum_v2_i64	195.1 µs	224.8 µs	-13.2%

Tip

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

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_{Comparing rk/typed-array-ref-accessors (7f86522) with develop (88a4de8)}

Footnotes

1. 534 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. ↩