A binding of the Nuke iOS image caching library for Xamarin.Forms.
Get it from Github:
This library was heavily inspired by Jonathan Peppers
GlideX implementation of the
IImageViewHandler interface for
Its goal is to provide the same kind of native implementation for
iOS, achieving a complete native image caching solution for
Xamarin.Forms: you don't have to change any line of your existing project, the
Xamarin.Forms image source handlers will just be overridden with cache-enabled ones.
A native swift library or nothing!
If you read my previous post on the subject, you should know that I really wanted to achieve the same thing than Jonathan Peppers with
GlideX.Forms on Android: a native image caching implementation for the
Xamarin.Forms iOS platform:
I ended-up writing an
It was OK, but I wanted MOAR.
I wanted a
Xamarin binding for a fancy swift native library, no less.
A new hope
Then earlier last year, it finally came out:
I was so pumped, I tried it right away!
Unfortunately, this was not as "o-matic" as I thought it would be...
I really tried hard to bind
Nuke, but encountered a lot of issues.
In fact the biding tools are still under heavy development and not really usable for now.
So I just forgot about it...
The hope strikes back
Last week, I was procrastinating away from my .NetConf Sharpnado recording, when I stumbled upon this blog post:
Bind a swift library in just 3 easy steps?
I was once against tempted.
It was indeed 3 easy steps, but there were also some easy sub-steps involved...
The blog post was in fact referring to the in-depth binding walkthrough here:
This doc is really well-written with a lot of screenshots, a nice example, some bash commands to be executed...
And guess what?
I finally managed to bind the iOS Nuke library \o/
The benchmark app is the same than in my previous post: the
GlideX sample app.
I changed a bit the
glidex benchmark samples to have a more fair comparison. I switched from a random distribution of the images to a deterministic one to be sure we are comparing the same data set.
System.Diagnostics.Process.GetCurrentProcess().WorkingSet64 to have the memory workload of the process. The value given in the results are the consumed bytes between the
MainPage and the complete loading of the target page.
The tests have been made on an iPhone 7 (real device, not a simulator).
For each test:
- Launch iPhone 7
- Wait 4-5 seconds on
- Launch a Page
- Scroll till the end of page
- Get consumed bytes in the output window
- Empty caches
- Kill app
|Page||Data Type||Xamarin.Forms 188.8.131.526||Xamarin.Forms.Nuke 8.4.0|
|GridOnlyRemotePage||Remote only||248 905 728||15 073 280 (-94%)|
|GridPage||Remote and local mix||195 035 136||15 040 512 (-92%)|
|ViewCellPage||Remote and local mix||41 418 752||20 758 528 (-50%)|
|ImageCellPage||Remote and local mix||27 000 832||20 611 072 (-24%)|
|HugeImagePage||Local only||128 516 096||8 634 368 (-93%)|
Comparison with FFImageLoading
Before I could successfully bind the
Nuke swift library, I tried to use
FFImageLoading as image source handler. You can find the older repository here:
As expected the native
Nuke library outperforms
FFImageLoading on every test.
|Page||Data Type||FFImageLoading 184.108.40.2062||Xamarin.Forms.Nuke 8.4.0|
|GridOnlyRemotePage||Remote only||25 722 880||15 073 280 (-41%)|
|GridPage||Remote and local mix||24 674 304||15 040 512 (-39%)|
|ViewCellPage||Remote and local mix||28 852 224 (1)||20 758 528 (-28%)|
|ImageCellPage||Remote and local mix||28 868 608 (2)||20 611 072 (-28%)|
|HugeImagePage||Local only||10 059 776||8 634 368 (-14%)|
- (1) often fails to load first images (failed 7 times on 10)
- (2) often fails to load some images (failed 6 times on 10)
And more importantly, it loads way faster the cells images:
View Cells test
Image Cells test