const compress/flate.NoCompression

4 uses

	compress/flate (current package)
		deflate.go#L15: 	NoCompression      = 0
		deflate.go#L573: 	case level == NoCompression:
		deflate.go#L607: 	case NoCompression:

	compress/gzip
		gzip.go#L19: 	NoCompression      = flate.NoCompression