Reserve table entry storage

[dduan]

Pre-allocate per-table key/array lists on first insert to reduce reallocation during parsing.

[github-actions]

Comparing results between 'main' and 'pull_request'

Host 'runnervmh13bl' 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	70	71	71	72	77	90	129	7047
pull_request	70	71	71	72	76	92	137	7018
Δ	0	0	0	0	-1	2	8	-29
Improvement %	0	0	0	0	1	-2	-6	-29

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

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	624	624	624	625	625	625	625	7047
pull_request	625	625	625	625	625	625	625	7018
Δ	1	1	1	0	0	0	0	-29
Improvement %	0	0	0	0	0	0	0	-29

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	6381	6515	6555	6603	6675	10991	23154	10000
pull_request	6452	6563	6603	6663	6723	9919	29635	10000
Δ	71	48	48	60	48	-1072	6481	0
Improvement %	-1	-1	-1	-1	-1	10	-28	0

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

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	8	9	9	9	9	9	9	10000
pull_request	8	9	9	9	9	9	9	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	272	272	272	273	277	277	277	4
pull_request	264	264	267	268	270	270	270	4
Δ	-8	-8	-5	-5	-7	-7	-7	0
Improvement %	3	3	2	2	3	3	3	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	9250	9314	9331	9355	9404	9617	9801	107
pull_request	9304	9347	9363	9380	9413	9683	9876	106
Δ	54	33	32	25	9	66	75	-1
Improvement %	-1	0	0	0	0	-1	-1	-1

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

Retains (K) *	p0	p25	p50	p75	p90	p99	p100	Samples
main	66	66	66	66	66	66	66	107
pull_request	66	66	66	66	66	66	66	106
Δ	0	0	0	0	0	0	0	-1
Improvement %	0	0	0	0	0	0	0	-1

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	16	17	17	18	18	19	19	58
pull_request	16	17	17	18	18	20	20	58
Δ	0	0	0	0	0	1	1	0
Improvement %	0	0	0	0	0	-5	-5	0

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

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	132	133	133	133	133	133	133	58
pull_request	132	133	133	133	133	133	133	58
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	2955	2990	3004	3019	3031	3211	3410	327
pull_request	2993	3023	3035	3045	3074	3502	3928	323
Δ	38	33	31	26	43	291	518	-4
Improvement %	-1	-1	-1	-1	-1	-9	-15	-4

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

Retains *	p0	p25	p50	p75	p90	p99	p100	Samples
main	1292	1293	1293	1293	1293	1293	1293	327
pull_request	1292	1293	1293	1293	1293	1293	1293	323
Δ	0	0	0	0	0	0	0	-4
Improvement %	0	0	0	0	0	0	0	-4