[robert3005]

The scaled-down integer to decimal cast selects its carrier as max(carrier(S), T). The source type S and the target type T fix the carrier, but match_each_decimal_value_type! compiled the kernel for all six decimal widths in each of the 48 (S, T) pairs. An if const condition now removes the five arms that cannot match before code generation. The arm that runs is the same as before.

primitive_decimal_carrier_type becomes a const fn so that the condition can use it.

	before	after
vortex-array release __text (macOS arm64)	14,012,988 B	13,697,852 B (-315 KB)
vortex-array LLVM IR lines	5,405,422	5,200,767

[codspeed]

Merging this PR will degrade performance by 3.21%

2 warnings, 1 note

⚠️ Walltime results may be unreliable

Some benchmarks used the Walltime instrument outside CodSpeed Macro Runners, which can make the results inconsistent.

Learn more about Macro Runners

See affected benchmarks

⚠️ 16 benchmarks are dominated by system calls

System calls cannot be simulated consistently and are left out of the measure. The reported value understates the real cost. Switch to the Walltime instrument to measure them.

Learn more about system calls

See affected benchmarks

ℹ️ 40 benchmarks have no flamegraph

The flamegraph wasn't generated: the symbols of the profiling trace could not be resolved, because no information about the language frames was collected.

See affected benchmarks

⚡ 1 improved benchmark
❌ 4 regressed benchmarks
✅ 2403 untouched benchmarks
⏩ 12 skipped benchmarks¹

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	CPU Simulation	decode_primitives[i64, (1000, 8)]	24.8 µs	37.8 µs	-34.35%
❌	Walltime	threshold_avx512[80]	2.4 µs	2.8 µs	-12.78%
❌	Walltime	compare_u8_neon	1.7 µs	1.9 µs	-11.61%
❌	Walltime	starts_with_avx2[64, VarBin]	53.7 µs	60.6 µs	-11.23%
⚡	Walltime	mul_u64_nonnull_neon	39.4 µs	20.8 µs	+89.11%

Tip

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

---

_{Comparing rk/size-decimal-cast-carrier (ec5286e) with develop (8c680f2)²}

Footnotes

1. 12 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 (c88edde) during the generation of this report, so 8c680f2 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩