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Deep-clone messages when there are multiple recipients

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Fixes #85

As well as adding deep-clone (via the new dependency on the 'clone' module), we no longer clone the message if there is a single recipient. This makes simple node-to-node flows more efficient.

I've done some simple profiling using process.hrtime to time how long the Node.send function takes, and at best, this change is neutral to performance.
This commit is contained in:
Nicholas O'Leary 2013-11-21 14:03:17 +00:00
parent 6a4aa1ff21
commit e1dbb95396
2 changed files with 23 additions and 14 deletions
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1
package.json
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@ -25,6 +25,7 @@
"mqtt": "~0.3.3",
"ws": "~0.4.31",
"fs-extra": "~0.8.1",
"clone": "~0.1.11",
"mustache": "~0.7.2",
"cron":"1.x",
"ntwitter":"0.5.0",

18
red/nodes.js
View File

@ -17,6 +17,7 @@ var util = require("util");
var EventEmitter = require("events").EventEmitter;
var fs = require("fs");
var path = require("path");
var clone = require("clone");
var events = require("./events");
var storage = null;
@ -149,22 +150,28 @@ Node.prototype.send = function(msg) {
for (var i in this.wires) {
var wires = this.wires[i];
if (i < msg.length) {
for (var j in wires) {
if (msg[i] != null) {
var msgs = msg[i];
if (!util.isArray(msg[i])) {
msgs = [msg[i]];
}
if (wires.length == 1) {
// Single recipient, don't need to clone the message
var node = registry.get(wires[0]);
if (node) {
for (var k in msgs) {
var mm = msgs[k];
var m = {};
for (var p in mm) {
if (mm.hasOwnProperty(p)) {
m[p] = mm[p];
node.receive(mm);
}
}
} else {
// Multiple recipients, must send message copies
for (var j in wires) {
var node = registry.get(wires[j]);
if (node) {
for (var k in msgs) {
var mm = msgs[k];
var m = clone(mm);
node.receive(m);
}
}
@ -173,6 +180,7 @@ Node.prototype.send = function(msg) {
}
}
}
}
module.exports.Node = Node;
Node.prototype.receive = function(msg) {