fix(core): serialization patch

[mdrxy]

Backport of #34455

[codspeed-hq]

CodSpeed Performance Report

Merging #34458 will improve performance by 24.9%

_{Comparing mdrxy/fix-ser (5956784) with master (75b07b3)¹}

⚠️ 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.

Summary

⚡ 6 improvements
✅ 17 untouched
⏩ 11 skipped²

Benchmarks breakdown

	Mode	Benchmark	BASE	HEAD	Efficiency
⚡	Simulation	test_init_time	12.2 ms	10.6 ms	+15.54%
⚡	Simulation	test_init_time	12.2 ms	10.6 ms	+15.53%
⚡	Simulation	test_stream_time	1,141.8 ms	965.1 ms	+18.31%
⚡	Simulation	test_stream_time	1,141.9 ms	965.3 ms	+18.3%
⚡	WallTime	test_import_time[HumanMessage]	273.9 ms	219.3 ms	+24.9%
⚡	Simulation	test_init_time	799.2 µs	693.6 µs	+15.22%

Footnotes

1. No successful run was found on v0.3 (d62d779) during the generation of this report, so master (75b07b3) was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

2. 11 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. ↩