perf(es/ast): Use smallvec and reduce size if possible #26976

Job	Run time
List crates to benchmark	31s
List crates to benchmark	31s
Build benchmark for hstr	1m 27s
Build benchmark for hstr	1m 29s
Build benchmark for swc	1m 11s
Build benchmark for swc	1m 21s
Build benchmark for swc_allocator	1m 27s
Build benchmark for swc_allocator	1m 28s
Build benchmark for swc_common	1m 14s
Build benchmark for swc_common	1m 10s
Build benchmark for swc_css_parser	1m 28s
Build benchmark for swc_css_parser	1m 27s
Build benchmark for swc_ecma_codegen	1m 28s
Build benchmark for swc_ecma_codegen	1m 28s
Build benchmark for swc_ecma_lints	1m 28s
Build benchmark for swc_ecma_lints	1m 28s
Build benchmark for swc_ecma_minifier	1m 12s
Build benchmark for swc_ecma_minifier	1m 14s
Build benchmark for swc_ecma_parser	1m 27s
Build benchmark for swc_ecma_parser	1m 28s
Build benchmark for swc_ecma_preset_env	1m 15s
Build benchmark for swc_ecma_preset_env	1m 16s
Build benchmark for swc_ecma_transforms_base	1m 27s
Build benchmark for swc_ecma_transforms_base	1m 27s
Build benchmark for swc_ecma_transforms_typescript	1m 14s
Build benchmark for swc_ecma_transforms_typescript	1m 16s
Build benchmark for swc_estree_compat	1m 12s
Build benchmark for swc_estree_compat	1m 13s
Build benchmark for swc_fast_ts_strip	1m 16s
Build benchmark for swc_fast_ts_strip	1m 17s
Build benchmark for swc_html_minifier	1m 19s
Build benchmark for swc_html_minifier	1m 22s
Build benchmark for swc_html_parser	1m 26s
Build benchmark for swc_html_parser	1m 27s
Run benchmarks	0s
Run benchmarks	0s
	44m 24s

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