1. Node / V8 architecture
2. Anatomy of event loop
3. Node as a first class citizen for Eclipse
4. Server side debugging through browser
5. In-built Node / V8 tracing
2. Agenda
♨ Overview of Node/V8 Runtime environment
♨ Eclipse as a Node.js development platform
♨ Debug Server-side Javascript through Browser
♨ Overview of in-built tracing
♨ Top tracing options in Node/V8
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
3. Philosophy of event-driven programming
Traditional synchronous multi-threaded model Asynchronous event driven model
Source: http://bit.ly/2baQkwp
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
4. 4
dns
file
net
timer
Hello event driven
world!
=> dnscb
127.0.0.1
=> fscb
Name: node …
=> netcb
<html> …
=> timercb
I am timed out
Anatomy of event loop
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
5. var a = 10
var b = ‘g’
var c = new Object()
res.on(‘data’, function(d) {
data += d
});
dynamic typing
async, event driven
born for the cloud
isomorphic
single threaded
Major features of Node.js
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
6. Eclipse for Node.js
Node.js a first class citizen in Eclipse
Nodeclipse is the Eclipse plugin for the Node.js
Professional Node.js development made easy, productive
and a cool experience
Syntax high-lighting, in-built semantic validation, live
debugging, Content assist and much more
Active community support
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
7. Prepare Eclipse for Node.js
Get the latest Node.js
Get the latest Java
Get the latest Eclipse
In Eclipse install new software
Switch to Node perspective
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
8. Debug Server side script in the browser
♨ Server side code can be very large
♨ Quite difficult to follow the control flow and logic
♨ console logging very inefficient, and bad practice
♨ Native debugging is even more complex
♨ At the same time, vetting critical for reliable production
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
9. Debug Server side script in the browser
♨ Install a debugger module
♨ Start the application in the debugger
♨ Get the debugger port, and access it in the Browser
♨ Start following the code!
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
10. Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
11. Tracing the script
Purpose
Trace Javascript functions with input and output
Output
Syntax (Heavy profile)
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
12. Log APIs
Purpose
Collect all the V8 API calls emanating from the application
Output
Syntax
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
13. Log Script execution
Purpose
Collect all the script / function information as and when they are loaded
/ compiled / recompiled
Output
Syntax
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
14. Tracing Garbage Collection
Purpose
Trace load in the v8 heap and collection patterns
Output
Syntax
Scavenge collection
Mark-sweep collection
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
15. Tracing Call Sequence
Purpose
Trace the code flow path on uncaught exception scenarios
Output
Syntax
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
16. Tracing Compilation
Purpose
Trace optimize compilation decisions and their reasons
Output
Syntax
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
17. Tracing Compiled Code
Purpose
Trace the generated native code for the Javascript source
Output
Syntax
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
18. Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
19. Selectively disable Compilation
Purpose
Identify and omit optimize compilation on problematic methods
Output
Syntax
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
20. Profile the application for Performance
♨ Manual profiling inefficient and impractical
♨ Adding time measurement cause further burden
♨ Native profilers do not provide Javascript insights
♨ Large applications often contain performance hideouts
♨ Precise performance measures is a hallmark qualifier for
software modules
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
21. Profile with v8 profiler, view with tick
♨ Run the code inside light-weight profiler
♨ Rename the generated log file to v8.log
♨ Install tick module
♨ Post-process the profile log
♨ Start analyzing the profile!
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
22. Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
23. For further learning
♨ Learn Node.js: https://nodejs.org/en/docs/
♨ Learn Javascript: http://www.w3schools.com/js/
♨ Learn V8: https://developers.google.com/v8/intro
♨ Learn Nodeclipse: http://www.nodeclipse.org
♨ Chrome developer tools: https://developer.chrome.com/devtools
Thursday, August 25, 2016EclipseSummit 2016, Bangalore Follow your code: Node / V8 tracing
