go/internal/fastwalk/fastwalk_dirent_fileno.go

// Copyright 2016 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// +build freebsd openbsd netbsd

package fastwalk

import "syscall"

func direntInode(dirent *syscall.Dirent) uint64 {
	return uint64(dirent.Fileno)
}
cmd/goimports, imports: optimize directory scanning and other things This brings goimports from 160ms to 100ms on my laptop, and under 50ms on my Linux machine. Using cmd/trace, I noticed that filepath.Walk is inherently slow. See https://golang.org/issue/16399 for details. Instead, this CL introduces a new (private) filepath.Walk implementation, optimized for speed and avoiding unnecessary work. In addition to avoid an Lstat per file, it also reads directories concurrently. The old goimports code did that too, but now that logic is removed from goimports and the code is simplified. This also adds some profiling command line flags to goimports that I found useful. Updates golang/go#16367 (goimports is slow) Updates golang/go#16399 (filepath.Walk is slow) Change-Id: I708d570cbaad3fa9ad75a12054f5a932ee159b84 Reviewed-on: https://go-review.googlesource.com/25001 Reviewed-by: Andrew Gerrand <adg@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> 2016-07-17 18:47:35 -06:00			`// Copyright 2016 The Go Authors. All rights reserved.`
			`// Use of this source code is governed by a BSD-style`
			`// license that can be found in the LICENSE file.`

			`// +build freebsd openbsd netbsd`

imports: extract fastWalk into new package internal/fastwalk It is going to be used by a new tool. Moved to an internal package so it does not become a publicly supported api. Modified the tests so they don't depend on the fix_test infrastructure. Change-Id: Ib8ebef24dc23e180960af04aa3d06b5f41a7c02b Reviewed-on: https://go-review.googlesource.com/99678 Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org> 2018-03-08 14:10:10 -07:00			`package fastwalk`
cmd/goimports, imports: optimize directory scanning and other things This brings goimports from 160ms to 100ms on my laptop, and under 50ms on my Linux machine. Using cmd/trace, I noticed that filepath.Walk is inherently slow. See https://golang.org/issue/16399 for details. Instead, this CL introduces a new (private) filepath.Walk implementation, optimized for speed and avoiding unnecessary work. In addition to avoid an Lstat per file, it also reads directories concurrently. The old goimports code did that too, but now that logic is removed from goimports and the code is simplified. This also adds some profiling command line flags to goimports that I found useful. Updates golang/go#16367 (goimports is slow) Updates golang/go#16399 (filepath.Walk is slow) Change-Id: I708d570cbaad3fa9ad75a12054f5a932ee159b84 Reviewed-on: https://go-review.googlesource.com/25001 Reviewed-by: Andrew Gerrand <adg@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> 2016-07-17 18:47:35 -06:00
			`import "syscall"`

			`func direntInode(dirent *syscall.Dirent) uint64 {`
			`return uint64(dirent.Fileno)`
			`}`