Node.js 0.8 features
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Node version 0.8 includes significant performance improvements and changes to core APIs. It provides up to 10% faster execution speed and up to 4x faster file I/O due to changes in the V8 engine and underlying system calls. Many core Node modules like http, net, and child_processes see major API changes and added functionality. New features like domains and clusters are introduced to make asynchronous code and load distribution across cores easier.
Node.js 0.8 features
- 1. Node Version 0.8.x What’s new in Node? http://www.meetup.com/Pittsburgh-Node-js/
- 2. NicholasDeveloper UX Designer & McClay @nickmcclay
- 4. How much faster is it?!?! A.) 1% B.) 10% C.) 50% D.) 100%
- 5. Ehh... its not really clear... Somewhere between 1% and 10% as far as I can tell...
- 6. A note about benchmarking node Remember it’s “./node” Huge deviation in repeated tests (3829 - 6462 #/sec) Node 0.4.x has issues running io.js (constant duration)
- 7. Write Speed Improvements 0.8 0.6 500 375 Write 1MB 250 125 0 1kb 4kb 8kb 16kb 32kb 64kb
- 8. Read Speed Improvements 0.8 0.6 400 300 Read 1MB 200 100 0 1kb 4kb 8kb 16kb 32kb 64kb
- 9. HTTP Server Improvements 0.8 0.6 0.4 6000 4500 Serve “Hello World!” 3000 1500 0 #/Sec
- 10. Uh... Apache Bench? 0.8 0.6 0.4 2500 100000 total requests 1875 100 concurrent requests 1250 625 0 #/Sec
- 11. API Changes
- 12. Deprecated http.Client() path.{exists,existsSync} -> fs.{exists,existsSync} tty.setRawMode(mode) -> tty.ReadStream#setRawMode() direct usage of ev_* and eio_*, should use uv_*
- 13. Removed waf build system -> gyp require(‘sys’) -> require(‘util’) process.installPrefix node --vars
- 14. Lots more changes and additions process • buffer ◦ process.stdin.on('keypress') will not be emitted by default, as it's an internal API. Use the keypress module now. ◦ 'utf16le' encoding. ◦ process.stdin.pipe(dest) will automatically call process.stdin.resume(). • child_process • cluster ◦ silent option to child_process.fork() - stdout and stderr won't be shared with parent. ◦ cluster.fork() no longer return a child_process.fork() object use cluster.fork().process to get the object. ◦ .disconnect() when using child_process.fork() this will allow the child to die gracefully. ◦ the 'death' event on the cluster object is renamed to 'exit'. ◦ stdio option for child_process.spawn() - configuration of child's stdio (file descriptors). ◦ the kill() method is renamed to destroy(). ◦ detached option for child_process.spawn() - make the child a process group leader (see docs) ◦ the CLUSTER_WORKER_ID env is now called CLUSTER_UNIQUE_ID, but you should not have used that anyway. ◦ child.send() can now send net.Server and net.Socket as second argument. ◦ workers now kill themselves when they accidentally lose their connection to the master. • cluster • http ◦ 'fork', 'online', 'listening', and 'setup' events. ◦ http.Server emits 'connect' event instead of 'upgrade' when the CONNECT method is requested. ◦ Worker object which is provided from cluster.workers (in the master) or cluster.worker (in the worker). ◦ http.ServerResponse sends Date: header by default. You can disable it by setting response.sendDate to false. ◦ env optional argument to cluster.fork(). ◦ http.ClientRequest emits 'connect' event instead of 'request' when the CONNECT method is responded. ◦ cluster.setupMaster() and cluster.settings. • net ◦ cluster.disconnect() and worker.disconnect(). ◦ net.listen(socketPath) no longer unlinks the socket unless you call server.close(). Automatic unlinking was ◦ worker.id what there before was internally known as workerID. subject to race conditions in multi-process setups. Also applies to http.listen(socketPath). ◦ worker.suicide flag set when worker disconnect or die, indicate if this was an accidental death. • child_process • crypto ◦ arguments and options arguments of child_process.fork() became an option. ◦ crypto.getDiffieHellman(). ◦ the 'exit' event is now emitted right after the child process exits. It no longer waits for all stdio pipes to be closed. ◦ cipher.setAutoPadding() and decipher.setAutoPadding(). ◦ the 'close' event was added that has is emitted after the child has exited and all the stdio pipes are closed. ◦ ciphers option to crypto.createCredentials(). • readline • domain ◦ arguments of rl.createInterface became an option as rl.createInterface(options) but still took an old style ◦ see http://nodejs.org/docs/v0.8.0/api/domain.html • fs
- 15. Lots more changes and additions process l f: • buffer rse ◦ process.stdin.on('keypress') will not be emitted by default, as it's an internal API. Use the keypress module now. ou ◦ 'utf16le' encoding. ◦ process.stdin.pipe(dest) will automatically call process.stdin.resume(). ry • child_process • cluster ad fo wiki/ ◦ silent option to child_process.fork() - stdout and stderr won't be shared with parent. ◦ cluster.fork() no longer return a child_process.fork() object use cluster.fork().process to get the object. re de/ ◦ .disconnect() when using child_process.fork() this will allow the child to die gracefully. ◦ the 'death' event on the cluster object is renamed to 'exit'. Go .com/joyent d-v0.8 /no ◦ stdio option for child_process.spawn() - configuration of child's stdio (file descriptors). ◦ the kill() method is renamed to destroy(). ◦ detached option for child_process.spawn() - make the child a process group leader (see docs) ◦ the CLUSTER_WORKER_ID env is now called CLUSTER_UNIQUE_ID, but you should not have used that anyway. ◦ child.send() can now send net.Server and net.Socket as second argument. ◦ workers now kill themselves when they accidentally lose their connection to the master. • cluster • http git hub 0.6 -an ◦ 'fork', 'online', 'listening', and 'setup' events. n-v ◦ http.Server emits 'connect' event instead of 'upgrade' when the CONNECT method is requested. tps: // wee ◦ Worker object which is provided from cluster.workers (in the master) or cluster.worker (in the worker). ◦ http.ServerResponse sends Date: header by default. You can disable it by setting response.sendDate to false. ht et ◦ env optional argument to cluster.fork(). ◦ http.ClientRequest emits 'connect' event instead of 'request' when the CONNECT method is responded. es-b ◦ cluster.setupMaster() and cluster.settings. ang • net ◦ cluster.disconnect() and worker.disconnect(). I-ch ◦ net.listen(socketPath) no longer unlinks the socket unless you call server.close(). Automatic unlinking was ◦ worker.id what there before was internally known as workerID. AP subject to race conditions in multi-process setups. Also applies to http.listen(socketPath). ◦ worker.suicide flag set when worker disconnect or die, indicate if this was an accidental death. • child_process • crypto ◦ arguments and options arguments of child_process.fork() became an option. ◦ crypto.getDiffieHellman(). ◦ the 'exit' event is now emitted right after the child process exits. It no longer waits for all stdio pipes to be closed. ◦ cipher.setAutoPadding() and decipher.setAutoPadding(). ◦ the 'close' event was added that has is emitted after the child has exited and all the stdio pipes are closed. ◦ ciphers option to crypto.createCredentials(). • readline • domain ◦ arguments of rl.createInterface became an option as rl.createInterface(options) but still took an old style ◦ see http://nodejs.org/docs/v0.8.0/api/domain.html • fs
- 16. req.pause actually pauses requests
- 18. highlights Domains provide a way to handle multiple different IO operations as a single group. Keeps context unlike“process.on(‘uncaughtException’)” Disabled by default
- 21. Without domains
- 22. Adding domains
- 23. With domains
- 25. highlights Take advantage of multi-core system to handle load easily create a network of processes that share common ports setup and manage master-slave worker relationships Disabled by default
- 26. Adding cluster
- 27. More cores = more node
- 30. Was intended to make child_process.fork() in a thread, rather than a full process. Make it cheaper to spin up new child node instances as well as fast message-passing using shared memory.
- 32. Caused too much instability Requires a lot of complexity added to libuv and node Isn’t likely to yield enough gains as the work requires
- 33. What’s next! Node v0.9 More speed improvements Major overhaul of streams ???
- 34. @nickmcclay See you for Node v0.10! Thanks!