perf: Speedup ndjson reader `~40%` #10595

Job	Run time
check-features	8m 17s
check-wasm	6m 0s
integration-test (ubuntu-latest)	2m 2s
test (ubuntu-latest)	3m 58s
integration-test (windows-latest)	7m 46s
test (windows-latest)	11m 43s
	39m 46s

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