VarBin: build views straight into a VarBinViewBuilder

[robert3005]

Instead of requiring canonical for varbin to export to varbinview builder we export directly to varbinview builder

[codspeed-hq]

Merging this PR will degrade performance by 9.77%

⚡ 1 improved benchmark
❌ 7 regressed benchmarks
✅ 1887 untouched benchmarks
🆕 6 new benchmarks
⏩ 43 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	decode_varbin[(1000, 2)]	62.2 µs	78 µs	-20.25%
❌	Simulation	chunked_canonicalize_into[(1000, 50, 8, 4)]	14.9 ms	17 ms	-11.97%
❌	Simulation	chunked_canonicalize_into[(1000, 50, 8, 16)]	16 ms	18.1 ms	-11.43%
❌	Simulation	chunked_dict_primitive_canonical_into[f32, (1000, 10, 100)]	1.4 ms	1.6 ms	-11.33%
❌	Simulation	decompress[u64, (1000, 16)]	65.2 µs	73.5 µs	-11.28%
❌	Simulation	chunked_canonicalize_into[(1000, 50, 8, 64)]	17.3 ms	19.4 ms	-10.62%
❌	Simulation	chunked_dict_primitive_canonical_into[u32, (1000, 100, 100)]	1.5 ms	1.6 ms	-10.05%
⚡	Simulation	compress_fsst[(1000, 64, 8)]	1.2 ms	1 ms	+11.71%
🆕	Simulation	chunked_varbin_into_canonical[(10, 100)]	N/A	680.4 µs	N/A
🆕	Simulation	chunked_varbin_into_canonical[(500, 2)]	N/A	169.8 µs	N/A
🆕	Simulation	chunked_varbin_opt_to_varbinview_builder[(10, 100)]	N/A	900.7 µs	N/A
🆕	Simulation	chunked_varbin_opt_to_varbinview_builder[(500, 2)]	N/A	157.8 µs	N/A
🆕	Simulation	chunked_varbin_to_varbinview_builder[(10, 100)]	N/A	512.7 µs	N/A
🆕	Simulation	chunked_varbin_to_varbinview_builder[(500, 2)]	N/A	158.5 µs	N/A

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/varbin-to-varbinview-builder (957a3ed) with develop (8316455)}

Footnotes

1. 43 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. ↩

[onursatici]

I wonder if we should follow up with refactoring the varbinview builder so it allows us to write views directly. This change helps us avoid re-writing the views but we still have a temporary views buffer that we copy from

[robert3005]

yes, there's a cleanup pass after all the builder changes. I noticed there's patterns that could be simplified/improved but they're spread out all over