Some of the benchmark updates from the headers change

[jasnell]

Extracted from #5396

Not all of the bench changes in that PR can be extracted here.

[codspeed-hq]

CodSpeed Performance Report

Merging #5429 will improve performances by 53.25%

_{Comparing jasnell/some-bench-updates (d8b91aa) with main (e5ace24)}

Summary

⚡ 2 improvements
✅ 31 untouched
🆕 1 new
⏩ 9 skipped¹

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
🆕	set_append[ApiHeaders]	N/A	15.9 ms	N/A
⚡	bodyWithHeaders[Response]	26.2 µs	24.1 µs	+8.92%
⚡	jsonResponse[Response]	53.2 µs	34.7 µs	+53.25%

Footnotes

1. 9 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. ↩