feat: Reduce stat operation if we are reading all (#5146) #3

Job	Run time
build_all_features	18m 27s
build_all_platforms (ubuntu-latest)	14m 41s
build_all_platforms (macos-latest)	2m 3s
build_default_features (ubuntu-latest)	38s
build_all_platforms (windows-latest)	6m 13s
build_default_features (macos-latest)	36s
build_under_wasm	44s
build_default_features (windows-latest)	2m 22s
check_clippy	15m 34s
check_docs	15m 29s
check_msrv	33s
unit	21m 20s
	1h 38m 40s

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