Fuse key normalization and hashing

[dduan]

Replace normalizeKey+fastKeyHash call pairs with a single normalizeKeyAndHash path in parser key creation/lookup flows.

For untransformed bare and single-quoted keys, compute key hash directly from source bytes while still materializing String for storage. Keep existing String-based hash path for transformed keys and double-quoted escape-decoded keys.

This removes repeated key re-hashing work in parseKeyValue/createKey* and fillTablePath hot paths without changing behavior.

[github-actions]

Comparing results between 'main' and 'pull_request'

Host 'runnervmwffz4' with 4 'x86_64' processors with 15 GB memory, running:
#18~24.04.1-Ubuntu SMP Sat Jun 28 04:46:03 UTC 2025

TOMLDecoderBenchmarks

Decode toml.io example metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (μs) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	57	57	58	58	60	74	124	7824
pull_request	57	57	58	58	60	71	100	7809
Δ	0	0	0	0	0	-3	-24	-15
Improvement %	0	0	0	0	0	4	19	-15

Retains: results within specified thresholds, fold down for details.

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	605	605	605	606	606	606	606	7824
pull_request	605	605	605	605	605	605	605	7809
Δ	0	0	0	-1	-1	-1	-1	-15
Improvement %	0	0	0	0	0	0	0	-15

Parse toml.io example metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (ns) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	5138	5211	5239	5279	5351	6763	25938	10000
pull_request	5177	5267	5299	5347	5431	6319	16634	10000
Δ	39	56	60	68	80	-444	-9304	0
Improvement %	-1	-1	-1	-1	-1	7	36	0

Retains: results within specified thresholds, fold down for details.

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	13	14	14	14	14	14	14	10000
pull_request	13	14	14	14	14	14	14	10000
Δ	0	0	0	0	0	0	0	0
Improvement %	0	0	0	0	0	0	0	0

decode canada.toml metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (ms) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	256	256	256	257	257	257	257	4
pull_request	260	260	261	261	261	261	261	4
Δ	4	4	5	4	4	4	4	0
Improvement %	-2	-2	-2	-2	-2	-2	-2	0

Retains: results within specified thresholds, fold down for details.

Retains (K) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	1674	1674	1674	1674	1674	1674	1674	4
pull_request	1674	1674	1674	1674	1674	1674	1674	4
Δ	0	0	0	0	0	0	0	0
Improvement %	0	0	0	0	0	0	0	0

decode twitter.toml metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (μs) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	8571	8692	8774	8831	8872	9372	10401	113
pull_request	8583	8675	8733	8782	8839	9404	9725	114
Δ	12	-17	-41	-49	-33	32	-676	1
Improvement %	0	0	0	1	0	0	6	1

Retains: results within specified thresholds, fold down for details.

Retains (K) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	68	68	68	68	68	68	68	113
pull_request	68	68	68	68	68	68	68	114
Δ	0	0	0	0	0	0	0	1
Improvement %	0	0	0	0	0	0	0	1

parse GitHub events archive metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (ms) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	154	154	155	156	157	157	157	7
pull_request	155	156	157	157	158	158	158	7
Δ	1	2	2	1	1	1	1	0
Improvement %	-1	-1	-1	-1	-1	-1	-1	0

Retains: results within specified thresholds, fold down for details.

Retains (K) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	150	150	150	150	150	150	150	7
pull_request	150	150	150	150	150	150	150	7
Δ	0	0	0	0	0	0	0	0
Improvement %	0	0	0	0	0	0	0	0

parse canada.toml metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (ms) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	15	16	16	16	16	17	17	63
pull_request	16	16	16	16	16	17	17	63
Δ	1	0	0	0	0	0	0	0
Improvement %	-7	0	0	0	0	0	0	0

Retains: results within specified thresholds, fold down for details.

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	133	134	134	134	134	134	134	63
pull_request	133	134	134	134	134	134	134	63
Δ	0	0	0	0	0	0	0	0
Improvement %	0	0	0	0	0	0	0	0

parse twitter.toml metrics

Time (wall clock): results within specified thresholds, fold down for details.

Time (wall clock) (μs) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	2585	2615	2626	2640	2656	2724	3479	372
pull_request	2617	2654	2669	2689	2726	2984	3713	364
Δ	32	39	43	49	70	260	234	-8
Improvement %	-1	-1	-2	-2	-3	-10	-7	-8

Retains: results within specified thresholds, fold down for details.

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	3138	3139	3139	3139	3139	3139	3139	372
pull_request	3138	3139	3139	3139	3139	3139	3139	364
Δ	0	0	0	0	0	0	0	-8
Improvement %	0	0	0	0	0	0	0	-8