Json-Variant exprs

[AdamGS]

Supersedes #8156

[codspeed-hq]

Merging this PR will degrade performance by 15.45%

⚠️ 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.

⚡ 1 improved benchmark
❌ 3 regressed benchmarks
✅ 1541 untouched benchmarks
⏩ 10 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	chunked_bool_canonical_into[(1000, 10)]	20.5 µs	35.6 µs	-42.32%
❌	Simulation	chunked_varbinview_into_canonical[(1000, 10)]	176.5 µs	213.2 µs	-17.19%
❌	Simulation	chunked_varbinview_canonical_into[(100, 100)]	273.4 µs	308.2 µs	-11.3%
⚡	Simulation	chunked_varbinview_opt_canonical_into[(1000, 10)]	215.8 µs	178.9 µs	+20.6%

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 adamg/variant-json-handling (b5d833f) with develop (01ea0fd)²}

Footnotes

1. 10 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 (0511832) during the generation of this report, so 01ea0fd was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩