Some minor parser performance improvements for ts #11285

Job	Run time
Prepare Cache	21s
Build Babel Artifacts on Windows	1m 48s
test262 - Prepare for running in parallel	26s
Build Babel Artifacts	1m 16s
Test on Node.js Latest	2m 50s
Build Babel 8 Artifacts	5m 28s
Test ESM version	2m 7s
Validate Yarn dependencies and constraints	27s
Third-party Parser Tests	1m 33s
Lint	4m 43s
Test on Node.js (20)	1m 28s
Test @babel/runtime integrations	1m 24s
Test on (windows-latest)	2m 13s
Test on Node.js (18)	1m 35s
Test on (macos-latest)	1m 29s
Test on Node.js (16)	1m 38s
Test @babel/eslint-* with ESLint 7.5.0	35s
Test on Node.js (14)	1m 48s
Test @babel/eslint-* with ESLint 8.0.0	29s
Test on Node.js (12)	1m 55s
Test on Node.js (10)	2m 35s
test262 (0)	10m 26s
Test on Node.js (8)	3m 42s
Test on Node.js (6)	4m 11s
test262 (1)	6m 39s
test262 (2)	7m 54s
test262 (3)	6m 31s
test262 (4)	7m 50s
test262 (5)	7m 29s
test262 (6)	7m 38s
test262 (7)	5m 36s
Test Babel 8 breaking changes on (ubuntu-latest)	1m 36s
Test Babel 8 breaking changes on (windows-latest)	2m 45s
Test Babel 8 breaking changes on (macos-latest)	2m 1s
test262 - Analyze results	56s
	1h 53m 22s

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