lib: optimize styleText when validateStream is false #3333

Job	Run time
Build slim tarball	2m 43s
x86_64-darwin: with shared libraries	56m 16s
aarch64-darwin: with shared libraries	38m 42s
aarch64-linux: with shared libraries	46m 23s
x86_64-linux: with shared libraries	51m 3s
	3h 15m 7s

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