Performance Optimization for Ext GWT 3.0

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Application performance is an important part of an application’s usability. This session will provide detailed information and tips to keep your applications running fast.

Technology

PERFORMANCE
Sven Brunken

sven@sencha.com @svenbrunken

Wednesday, November 2, 2011

Overview
Why optimize an application?
What can you optimize?
How to optimize it?
Questions

Wednesday, November 2, 2011

Why Optimize An
Application?

Wednesday, November 2, 2011

Better User Experience

Wednesday, November 2, 2011

What Can You
Optimize?

Wednesday, November 2, 2011

What Can You Optimize?
Application loading time
Application performance
Memory consumption

Wednesday, November 2, 2011

But, How To Do It?

Wednesday, November 2, 2011

Application Loading
GZip your content
Cache your content
Remove not required ﬁles
Obfuscate any external CSS and Javascript
Reduce the amount of RPC calls on application startup

Wednesday, November 2, 2011

GZip Your Files
GWT has a pre deﬁned Linker for this
Simply inherit the PrecompressLinker module

By default in gzips your html, js and css ﬁles

Wednesday, November 2, 2011

How To Reduce The
Amount of RPC Calls?

Wednesday, November 2, 2011

How To Reduce It?
Applications require to load multiple initial data
Each load makes a new round trip to the server
Each request contains a huge amount of data
And there is the HTTP protocol overhead

Wednesday, November 2, 2011

10 Requests At Page Load

Wednesday, November 2, 2011

Extra Data With Each Request

Wednesday, November 2, 2011

Why Not Sending The
Data With the Initial
Request?

Wednesday, November 2, 2011

Advantages
No further roundtrip required
All data on the client with the ﬁrst page load
Less waiting time for the user

Wednesday, November 2, 2011

No More Request At Page Load

Wednesday, November 2, 2011

Demonstration

Wednesday, November 2, 2011

How To Do It?
Serialize the data manually

String value = "Lorem ipsum dolor sit amet, consectetur ...";

ServerSerializationStreamWriter writer = new ServerSerializationStreamWriter
(RPC.getDefaultSerializationPolicy());

writer.prepareToWrite();
writer.serializeValue(value, String.class);

Wednesday, November 2, 2011

Put It Into The Main Page
We put the Data for all our calls into a Javascript Object
<script>
var dictionary = {
<%
String value = "Lorem ipsum dolor sit amet, consectetur ...";
String[] methods = {"A","B","C","D","E","F","G","H","I","J"};

for (int i = 0; i < methods.length; i++) {
ServerSerializationStreamWriter writer = ...
out.print(""call"+methods[i]+"": ""+writer.toString().replaceAll("","
" ).replaceAll(""",""" )+""");
if(i<methods.length-1) {
out.print(",");
}
}
%>
};
</script>

Wednesday, November 2, 2011

Client Side Is Reading It
Taking advantage of the SerializationStreamFactoy class
Using the Dictionary to access our Javascript Object

SerializationStreamFactory factory = GWT
.create(PerformanceService.class);

Dictionary d = Dictionary.getDictionary("dictionary");
try {
SerializationStreamReader r = null;
r = factory.createStreamReader(d.get("callA"));
String v1 = r.readString();

...

} catch (SerializationException e) {
throw new RuntimeException(e);
}

Wednesday, November 2, 2011

Application Performance
Do not try to solve everything with Widgets
Do not run complicated logic on the client
Do not use more Widgets than required
Do not create Widgets until needed

Wednesday, November 2, 2011

Widgets Are Expensive
Do not use Widgets for everything
They are expensive
Try to use plain HTML where ever possible

Wednesday, November 2, 2011

Only Simple Logic
Do not try to solve complicated logic on the client
Make a server round trip
Do not run code that is not required
Analyze your code to see if really only the required runs

Wednesday, November 2, 2011

Reduce The Widget Count
Do not nest containers too deeply
Only use the minimum amount of containers required

Wednesday, November 2, 2011

Too Many Not Required Containers

Wednesday, November 2, 2011

Same Looking, Less Containers

Wednesday, November 2, 2011

And This Has One More
Advantage!

Wednesday, November 2, 2011

Reduced Memory
Consumption

Wednesday, November 2, 2011

After, Same Functionality

Wednesday, November 2, 2011

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Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-und-domino-lizenzkostenreduzierung-in-der-welt-von-dlau/ DLAU und die Lizenzen nach dem CCB- und CCX-Modell sind für viele in der HCL-Community seit letztem Jahr ein heißes Thema. Als Notes- oder Domino-Kunde haben Sie vielleicht mit unerwartet hohen Benutzerzahlen und Lizenzgebühren zu kämpfen. Sie fragen sich vielleicht, wie diese neue Art der Lizenzierung funktioniert und welchen Nutzen sie Ihnen bringt. Vor allem wollen Sie sicherlich Ihr Budget einhalten und Kosten sparen, wo immer möglich. Das verstehen wir und wir möchten Ihnen dabei helfen! Wir erklären Ihnen, wie Sie häufige Konfigurationsprobleme lösen können, die dazu führen können, dass mehr Benutzer gezählt werden als nötig, und wie Sie überflüssige oder ungenutzte Konten identifizieren und entfernen können, um Geld zu sparen. Es gibt auch einige Ansätze, die zu unnötigen Ausgaben führen können, z. B. wenn ein Personendokument anstelle eines Mail-Ins für geteilte Mailboxen verwendet wird. Wir zeigen Ihnen solche Fälle und deren Lösungen. Und natürlich erklären wir Ihnen das neue Lizenzmodell. Nehmen Sie an diesem Webinar teil, bei dem HCL-Ambassador Marc Thomas und Gastredner Franz Walder Ihnen diese neue Welt näherbringen. Es vermittelt Ihnen die Tools und das Know-how, um den Überblick zu bewahren. Sie werden in der Lage sein, Ihre Kosten durch eine optimierte Domino-Konfiguration zu reduzieren und auch in Zukunft gering zu halten. Diese Themen werden behandelt - Reduzierung der Lizenzkosten durch Auffinden und Beheben von Fehlkonfigurationen und überflüssigen Konten - Wie funktionieren CCB- und CCX-Lizenzen wirklich? - Verstehen des DLAU-Tools und wie man es am besten nutzt - Tipps für häufige Problembereiche, wie z. B. Team-Postfächer, Funktions-/Testbenutzer usw. - Praxisbeispiele und Best Practices zum sofortigen Umsetzen

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Performance Optimization for Ext GWT 3.0

1. Wednesday, November 2, 2011

2. PERFORMANCE Sven Brunken sven@sencha.com @svenbrunken Wednesday, November 2, 2011

3. Overview Why optimize an application? What can you optimize? How to optimize it? Questions Wednesday, November 2, 2011

4. Why Optimize An Application? Wednesday, November 2, 2011

5. Better User Experience Wednesday, November 2, 2011

6. What Can You Optimize? Wednesday, November 2, 2011

7. What Can You Optimize? Application loading time Application performance Memory consumption Wednesday, November 2, 2011

8. But, How To Do It? Wednesday, November 2, 2011

9. Application Loading GZip your content Cache your content Remove not required ﬁles Obfuscate any external CSS and Javascript Reduce the amount of RPC calls on application startup Wednesday, November 2, 2011

10. GZip Your Files GWT has a pre deﬁned Linker for this Simply inherit the PrecompressLinker module By default in gzips your html, js and css ﬁles Wednesday, November 2, 2011

11. How To Reduce The Amount of RPC Calls? Wednesday, November 2, 2011

12. How To Reduce It? Applications require to load multiple initial data Each load makes a new round trip to the server Each request contains a huge amount of data And there is the HTTP protocol overhead Wednesday, November 2, 2011

13. 10 Requests At Page Load Wednesday, November 2, 2011

14. 10 Requests At Page Load Wednesday, November 2, 2011

15. 10 Requests At Page Load Wednesday, November 2, 2011

16. Extra Data With Each Request Wednesday, November 2, 2011

17. Extra Data With Each Request Wednesday, November 2, 2011

18. Why Not Sending The Data With the Initial Request? Wednesday, November 2, 2011

19. Advantages No further roundtrip required All data on the client with the ﬁrst page load Less waiting time for the user Wednesday, November 2, 2011

20. Extra Data With Each Request Wednesday, November 2, 2011

21. Extra Data With Each Request Wednesday, November 2, 2011

22. No More Request At Page Load Wednesday, November 2, 2011

23. Demonstration Wednesday, November 2, 2011

24. How To Do It? Serialize the data manually String value = "Lorem ipsum dolor sit amet, consectetur ..."; ServerSerializationStreamWriter writer = new ServerSerializationStreamWriter (RPC.getDefaultSerializationPolicy()); writer.prepareToWrite(); writer.serializeValue(value, String.class); Wednesday, November 2, 2011

25. Put It Into The Main Page We put the Data for all our calls into a Javascript Object <script> var dictionary = { <% String value = "Lorem ipsum dolor sit amet, consectetur ..."; String[] methods = {"A","B","C","D","E","F","G","H","I","J"}; for (int i = 0; i < methods.length; i++) { ServerSerializationStreamWriter writer = ... out.print(""call"+methods[i]+"": ""+writer.toString().replaceAll(""," " ).replaceAll(""",""" )+"""); if(i<methods.length-1) { out.print(","); } } %> }; </script> Wednesday, November 2, 2011

26. Client Side Is Reading It Taking advantage of the SerializationStreamFactoy class Using the Dictionary to access our Javascript Object SerializationStreamFactory factory = GWT .create(PerformanceService.class); Dictionary d = Dictionary.getDictionary("dictionary"); try { SerializationStreamReader r = null; r = factory.createStreamReader(d.get("callA")); String v1 = r.readString(); ... } catch (SerializationException e) { throw new RuntimeException(e); } Wednesday, November 2, 2011

27. Application Performance Do not try to solve everything with Widgets Do not run complicated logic on the client Do not use more Widgets than required Do not create Widgets until needed Wednesday, November 2, 2011

28. Widgets Are Expensive Do not use Widgets for everything They are expensive Try to use plain HTML where ever possible Wednesday, November 2, 2011

29. Only Simple Logic Do not try to solve complicated logic on the client Make a server round trip Do not run code that is not required Analyze your code to see if really only the required runs Wednesday, November 2, 2011

30. Reduce The Widget Count Do not nest containers too deeply Only use the minimum amount of containers required Wednesday, November 2, 2011

31. Too Many Not Required Containers Wednesday, November 2, 2011

32. Too Many Not Required Containers Wednesday, November 2, 2011

33. Same Looking, Less Containers Wednesday, November 2, 2011

34. Same Looking, Less Containers Wednesday, November 2, 2011

35. Demonstration Wednesday, November 2, 2011

36. And This Has One More Advantage! Wednesday, November 2, 2011

37. Reduced Memory Consumption Wednesday, November 2, 2011

38. Before Wednesday, November 2, 2011

39. Before Wednesday, November 2, 2011

40. After, Same Functionality Wednesday, November 2, 2011

41. After, Same Functionality Wednesday, November 2, 2011