6520da6ed5
All io.Reader that are passed to newScanState in all the standard library tests that implement io.RuneReader also implement io.RuneScanner. Do not check on each call ScanState's UnreadRune that the used RuneReader also implements the UnreadRune method by using a private interface. Instead require the used Reader to implement the public RuneScanner interface. The extra implementation logic for UnreadRune is removed from ScanState. Instead the readRune wrapper is extended to implement UnreadRune for the RuneScanner interface. If the Reader passed to newScanstate does not implement RuneScanner the readRune wrapper is used to implement the missing functionality. Note that a RuneReader that does not implement RuneScanner will also be wrapped by runeRead which was not the case before. Performance with the readRune wrapper is better than without before. Add benchmark to compare performance with and without using the readRune wrapper. name old time/op new time/op delta ScanInts-2 704µs ± 0% 615µs ± 1% -12.73% (p=0.000 n=20+20) ScanRecursiveInt-2 82.6ms ± 0% 51.4ms ± 0% -37.71% (p=0.000 n=20+20) ScanRecursiveIntReaderWrapper-2 85.1ms ± 0% 52.4ms ± 0% -38.36% (p=0.000 n=20+20) Change-Id: I8c6e85db9b87a8171caab12f020b6e256b498e81 Reviewed-on: https://go-review.googlesource.com/19895 Run-TryBot: Rob Pike <r@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rob Pike <r@golang.org> |
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The Go Programming Language
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Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this file). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install-source.html). You should also add the Go binary directory $GOROOT/bin to your shell's path.
For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile:
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