Lazy Flutter performance | Session
Вставка
- Опубліковано 18 тра 2021
- Learn the limits of performance with lazy-loaded content, and understand how Flutter can help build a smooth experience out of the box.
Resources:
Debug and profile your app with Flutter DevTools | Demo→ goo.gle/3ojoYLB
Speaker: Justin McCandless
Watch more:
Flutter at Google I/O 2021 Playlist → goo.gle/io21-Flutter
All Google I/O 2021 Technical Sessions → goo.gle/io21-technicalsessions
All Google I/O 2021 Sessions → goo.gle/io21-allsessions
Subscribe to Flutter! → goo.gle/FlutterYT
#GoogleIO #Flutter
product: Flutter - Troubleshooting and Performance; event: Google I/O 2021; fullname: Justin McCandless; re_ty: Premiere; - Наука та технологія
My man using vim with Flutter. Absolute madlad.
It’s the only way I use it
The procedural generation example is insane! Nice Work!
that game was really cool, i never thought about creating a game with flutter
Great demo! I really like the procedurally generated map demo 💯
Truely and the only Cross-platform developing language!
I use it when I make the dashboard for a project without I have learned UWP, and etc.
Always exciting with Flutter!
Wowzy, this tutorial outperformed my expectations.
Yooo! That game example at the end was dope! I really wanna recreate Among Us now
There was another Flutter game mentioned in the keynote today that looked really good, it was all 2d pixel art.
@@justinmccandless may i know the link or timestamp? thankyou
@@doombois8170 It was the bonfire engine, I think they didn't mention the name of the game bonfire-engine.github.io/#/examples
These are the only videos without ads.
Awesome, just what I needed
Great idea and tips! I'm learning a lot with this video and others. Thank you! 😊
By the way, as a Korean developer who love and use flutter I really thank to the flutter channel for the Korean subtitle!
I love him/her who added that on this video. I clearly can understand what you are talking about! 😂 Hooray~!
Also I've never heard of Flame! developing game with flutter? wow~ that's amazing! yay~!
flutter is growing faster than speed of photons
Isn't the speed of photons constant?
@@wdestroier no it's not stable., it's like communist! 😜
It's insane to see what Flutter is capable. Procedural generation makes me want to start making games in Flutter. Amazing!
There's no better time to start making games in Flutter than now 😁🎮
Check out the newly launched Casual Games Toolkit: flutter.dev/games?gclid=CjwKCAjwp7eUBhBeEiwAZbHwkRuPztRlKf1ygRt07z_vc_D1KnGdqd4Qz8AJrXz0493Tkamx3_aYGxoC8cgQAvD_BwE&gclsrc=aw.ds
Gaming and Flutter? Oh, yes we did! There are some great resources to help you learn how to build an amazing game. Check them out here: goo.gle/3DzLs42
If you do make that game, share it! We would love to see what you create 🎨
Good job Justin! Nice.
Great content, thanks 👍🏻
Nice tips, thanks
great topic, thanks
Super useful ! thanks
Good!
A GOOD FLUTTER CHANNAEL
using vim as ide is a nice tough
this is going to be bigger and nicer
the procedural generation is mind blowing!
Awesome
do state restoration next please..
awesome
Haven't watched the video yet, but this is exactly what I need now.
What is the Debug tool you are using? I think you are in Visual Studio code, but what's the debug tool to monitor the MB size and all?
Great video - question...what's the reason for the existence of "singleChildScrollView", when "ListView.builder" always handles it better? Is there any time when singeChildScrollView would be a better option?
I think it is exist if we want to do a simple scroll of a fixed set of menu, widget, etc. Not a (presumably) large set of data.
Just Imagine you have a simple screen with few text widgets and you want to be sure that it is readable on devices with small displays. That's when I use single child scroll view. Very fast to write, and you don"t need to worry about its performance because the small text widgets are very light.
A good example would be FAQ screen in settings and such.
the procedural generation is part is awesome(zoom in and out) where can i find the code of this part??
Here you go. I had planned to show the code in the talk but I couldn't fit into 15 minutes. github.com/justinmc/flutter-lazy-performance
@@justinmccandless thanks for the reply and share the code :)
I don't get the zooming thing at the end. Why doesn't Flutter just tell you what cells are visible when they zoom just as it does when they pan?
There should be a way to block popping problem. Like instagram, it doesnt lags when i scroll down.
13:08 Part UI Framework. Part 2D game engine.
Is there any chance to get the demo source code?
Sure! github.com/justinmc/flutter-lazy-performance
Please make a tutorial on how to use Vim with Flutter. Do you get auto complete or in-line docs using vim?
you can use vscode vim plugin on vscode
Here's my config, should be mostly up to date. I really should clean it up and make a tutorial, thanks for the idea. github.com/justinmc/dotfiles/blob/master/init.vim
5:19 Justin Time
so how do we prevent pop in?
I think there's a tradeoff depending on how your app will be used. You could trade a bigger memory footprint for less pop in by loading more items in advance, for example. I probably would have gone into more depth about that in the talk, but I really wanted to include the procedural generation demo :)
@@justinmccandless hi how can we load more items in advance ?
any extension and tutorial for vim with flutter?
Hi there!
We think you might find the following resources helpful:
Full vim config here :
goo.gle/3OZWtOT
Dart-vim-plugin and coc-flutter:
goo.gle/3zyYH1V
goo.gle/3d6LhT2.
Hope this helps 😎
Improve dart at the same rate so that we can abandon python for intelligence services . Flutter forever
I can not understand how it is possible that we can run games with a lot animations, sounds, networking and other stuff, but we can not scroll 100 items without frame drops
because of JVM. it limits our app memory usage, the bigger the memory it consumes the laggier it becomes. so we need to implement lazy performance like the video demonstrated
The scrolling problem with Flutter web is really serious.
Why do I feel like flatter is made just for me?
Imagine non-developers reading the title of the video 😂
I would like a paid internship opportunity for a startup in the US. if you can point me to any opportunities. i'm from brazil and i'm studying flutter for a while and i have experience in other languages. I'm perfecting my English too. if you can help me. thanks
We need a widget like recycler builder from native Android.
using SliverList/ListView or SliverGrid/GridView on Flutter is equivalent of using RecylerView/RecyclerBuilder on Android. They give us those recycling feature a.k.a. caching the only needed items.
@ulbsu albrykya but, if I am not wrong, the recycler builder also recycles and reuses the already made widgets while scrolling, which improves the performance.
Does listview do that?
@@viditkhanna3721 from my experience, yes it does. I set automaticKeepAlives to false though, so it doesn't keep unnecessary items on screen. you can read it more on flutter's doc about ListView
But InteractiveViewer don't have a builder constructor :(
Not in stable yet, but here it is in the master docs: master-api.flutter.dev/flutter/widgets/InteractiveViewer/InteractiveViewer.builder.html
ScrollView vs. RecyclerView