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resources: Cache Exif data to disk

Browse source 
```bash
name                        old time/op    new time/op    delta
ImageExif/Cold_cache-4         312µs ±28%     355µs ± 7%     ~     (p=0.343 n=4+4)
ImageExif/Cold_cache,_10-4     479µs ± 6%     546µs ± 0%  +13.91%  (p=0.029 n=4+4)
ImageExif/Warm_cache-4         272µs ± 1%      81µs ± 5%  -70.30%  (p=0.029 n=4+4)

name                        old alloc/op   new alloc/op   delta
ImageExif/Cold_cache-4         151kB ± 0%     161kB ± 0%   +6.46%  (p=0.029 n=4+4)
ImageExif/Cold_cache,_10-4     179kB ± 0%     189kB ± 0%   +5.49%  (p=0.029 n=4+4)
ImageExif/Warm_cache-4         151kB ± 0%      13kB ± 0%  -91.52%  (p=0.029 n=4+4)

name                        old allocs/op  new allocs/op  delta
ImageExif/Cold_cache-4         1.03k ± 0%     1.21k ± 0%  +17.78%  (p=0.029 n=4+4)
ImageExif/Cold_cache,_10-4     1.65k ± 0%     1.83k ± 0%  +11.09%  (p=0.029 n=4+4)
ImageExif/Warm_cache-4         1.03k ± 0%     0.28k ± 0%  -72.40%  (p=0.029 n=4+4)
```

Fixes #6291
This commit is contained in:
Bjørn Erik Pedersen 2019-09-01 17:27:21 +02:00
parent de9cbf6195
commit ce47c21a29
7 changed files with 172 additions and 41 deletions
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50
resources/image_test.go
View file

@ -15,6 +15,7 @@ package resources
import (
"fmt"
"math/big"
"math/rand"
"os"
"path/filepath"
@ -22,6 +23,7 @@ import (
"strconv"
"sync"
"testing"
"time"
"github.com/spf13/afero"
@ -50,6 +52,14 @@ var eq = qt.CmpEquals(
cmp.Comparer(func(m1, m2 media.Type) bool {
return m1.Type() == m2.Type()
}),
cmp.Comparer(
func(v1, v2 *big.Rat) bool {
return v1.RatString() == v2.RatString()
},
),
cmp.Comparer(func(v1, v2 time.Time) bool {
return v1.Unix() == v2.Unix()
}),
)
func TestImageTransformBasic(t *testing.T) {
@ -336,27 +346,35 @@ func TestSVGImageContent(t *testing.T) {
func TestImageExif(t *testing.T) {
c := qt.New(t)
image := fetchImage(c, "sunset.jpg")
fs := afero.NewMemMapFs()
spec := newTestResourceSpec(specDescriptor{fs: fs, c: c})
image := fetchResourceForSpec(spec, c, "sunset.jpg").(resource.Image)
x, err := image.Exif()
c.Assert(err, qt.IsNil)
c.Assert(x, qt.Not(qt.IsNil))
getAndCheckExif := func(c *qt.C, image resource.Image) {
x, err := image.Exif()
c.Assert(err, qt.IsNil)
c.Assert(x, qt.Not(qt.IsNil))
c.Assert(x.Date.Format("2006-01-02"), qt.Equals, "2017-10-27")
c.Assert(x.Date.Format("2006-01-02"), qt.Equals, "2017-10-27")
// Malaga: https://goo.gl/taazZy
c.Assert(x.Lat, qt.Equals, float64(36.59744166666667))
c.Assert(x.Long, qt.Equals, float64(-4.50846))
// Malaga: https://goo.gl/taazZy
c.Assert(x.Lat, qt.Equals, float64(36.59744166666667))
c.Assert(x.Long, qt.Equals, float64(-4.50846))
v, found := x.Values["LensModel"]
c.Assert(found, qt.Equals, true)
lensModel, ok := v.(string)
c.Assert(ok, qt.Equals, true)
c.Assert(lensModel, qt.Equals, "smc PENTAX-DA* 16-50mm F2.8 ED AL [IF] SDM")
v, found := x.Tags["LensModel"]
c.Assert(found, qt.Equals, true)
lensModel, ok := v.(string)
c.Assert(ok, qt.Equals, true)
c.Assert(lensModel, qt.Equals, "smc PENTAX-DA* 16-50mm F2.8 ED AL [IF] SDM")
resized, _ := image.Resize("300x200")
x2, _ := resized.Exif()
c.Assert(x2, eq, x)
}
resized, _ := image.Resize("300x200")
x2, _ := resized.Exif()
c.Assert(x2, qt.Equals, x)
getAndCheckExif(c, image)
image = fetchResourceForSpec(spec, c, "sunset.jpg").(resource.Image)
// This will read from file cache.
getAndCheckExif(c, image)
}