debug

str various refactor and perf #298

Job	Run time
debug (1.72, 3.13)	1m 2s
debug (1.72, 3.12)	1m 11s
debug (1.72, 3.8)	1m 13s
debug (1.72, --features=yyjson, 3.13)	1m 10s
debug (1.72, --features=yyjson, 3.12)	1m 2s
debug (1.72, --features=yyjson, 3.8)	1m 8s
debug (nightly-2024-07-02, --features=yyjson,unstable-simd, 3.13)	1m 2s
debug (nightly-2024-07-02, --features=yyjson,unstable-simd, 3.12)	1m 2s
debug (nightly-2024-07-02, --features=yyjson,unstable-simd, 3.8)	1m 9s
debug (nightly-2024-07-02, --features=avx512,yyjson,unstable-simd, 3.13)	1m 2s
debug (nightly-2024-07-02, --features=avx512,yyjson,unstable-simd, 3.12)	1m 2s
debug (nightly-2024-07-02, --features=avx512,yyjson,unstable-simd, 3.8)	1m 8s
	13m 11s

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