Use
(io.StringWriter).WriteString for writing strings GO-P4008
Performance
Major
2 months ago
—
2 months old
fh.WriteString("derp") should be preferred to the fh.Write([]byte("derp"))
153 require.NoError(t, fs.MkdirAll(namer.dir(), 0700))
154 fh, err := fs.Create(namer.path())
155 require.NoError(t, err)
156 _, err = fh.Write([]byte("derp"))157 require.NoError(t, err)
158 require.NoError(t, fh.Close())
159}
Description
It is recommended to use (io.StringWriter).WriteString instead of
(io.StringWriter).Write or io.WriteString for writing strings as it decreases
the number of allocations required, therefore improving performance.
Bad practice
package main
import (
"io"
)
func foo(w io.StringWriter) {
w.Write([]byte("foo"))
io.WriteString(w, "bar")
}
Recommended
package main
import (
"io"
)
func foo(w io.StringWriter) {
w.WriteString("foo")
w.WriteString("bar")
}