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hugofs: Make FileMeta a struct

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This commit started out investigating a `concurrent map read write` issue, ending by replacing the map with a struct.

This is easier to reason about, and it's more effective:

```
name                                  old time/op    new time/op    delta
SiteNew/Regular_Deep_content_tree-16    71.5ms ± 3%    69.4ms ± 5%    ~     (p=0.200 n=4+4)

name                                  old alloc/op   new alloc/op   delta
SiteNew/Regular_Deep_content_tree-16    29.7MB ± 0%    27.9MB ± 0%  -5.82%  (p=0.029 n=4+4)

name                                  old allocs/op  new allocs/op  delta
SiteNew/Regular_Deep_content_tree-16      313k ± 0%      303k ± 0%  -3.35%  (p=0.029 n=4+4)
```

See #8749
This commit is contained in:
Bjørn Erik Pedersen
2021-07-13 11:41:02 +02:00
parent f27e542442
commit 022c479551
44 changed files with 434 additions and 451 deletions
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12
hugofs/decorators.go
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@@ -23,7 +23,7 @@ import (
"github.com/spf13/afero"
)
func decorateDirs(fs afero.Fs, meta FileMeta) afero.Fs {
func decorateDirs(fs afero.Fs, meta *FileMeta) afero.Fs {
ffs := &baseFileDecoratorFs{Fs: fs}
decorator := func(fi os.FileInfo, name string) (os.FileInfo, error) {
@@ -82,9 +82,11 @@ func NewBaseFileDecorator(fs afero.Fs, callbacks ...func(fi FileMetaInfo)) afero
decorator := func(fi os.FileInfo, filename string) (os.FileInfo, error) {
// Store away the original in case it's a symlink.
meta := FileMeta{metaKeyName: fi.Name()}
meta := NewFileMeta()
meta.Name = fi.Name()
if fi.IsDir() {
meta[metaKeyJoinStat] = func(name string) (FileMetaInfo, error) {
meta.JoinStatFunc = func(name string) (FileMetaInfo, error) {
joinedFilename := filepath.Join(filename, name)
fi, _, err := lstatIfPossible(fs, joinedFilename)
if err != nil {
@@ -102,7 +104,7 @@ func NewBaseFileDecorator(fs afero.Fs, callbacks ...func(fi FileMetaInfo)) afero
isSymlink := isSymlink(fi)
if isSymlink {
meta[metaKeyOriginalFilename] = filename
meta.OriginalFilename = filename
var link string
var err error
link, fi, err = evalSymlinks(fs, filename)
@@ -110,7 +112,7 @@ func NewBaseFileDecorator(fs afero.Fs, callbacks ...func(fi FileMetaInfo)) afero
return nil, err
}
filename = link
meta[metaKeyIsSymlink] = true
meta.IsSymlink = true
}
opener := func() (afero.File, error) {