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Follow your code: Node tracing
- 1. Follow your code: Node/V8 tracing Gireesh Punathil, 26th Aug 2016
- 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