do not process the input text beyond requested #138

Job	Run time
build (ubuntu-latest, 3.8, false)	2m 10s
build (ubuntu-latest, 3.9, false)	1m 51s
build (ubuntu-latest, 3.10, false)	1m 49s
build (ubuntu-latest, 3.11, false)	1m 10s
build (ubuntu-latest, 3.12, false)	2m 29s
build (ubuntu-latest, pypy2.7, false)	1m 37s
build (ubuntu-latest, pypy3.10, false)	1m 55s
build (macos-latest, 3.8, false)	2m 32s
build (macos-latest, 3.9, false)	2m 41s
build (macos-latest, 3.10, false)	2m 23s
build (macos-latest, 3.11, false)	1m 25s
build (macos-latest, 3.12, false)	1m 42s
build (macos-latest, pypy2.7, false)	1m 27s
build (macos-latest, pypy3.10, false)	2m 12s
build (windows-latest, 3.8, false)	1m 45s
build (windows-latest, 3.9, false)	2m 2s
build (windows-latest, 3.10, false)	1m 58s
build (windows-latest, 3.11, false)	1m 26s
build (windows-latest, 3.12, false)	1m 39s
build (windows-latest, pypy2.7, false)	1m 47s
build (windows-latest, pypy3.10, false)	2m 23s
	40m 23s

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