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Improve performance of parser

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Tom MacWright
2012-10-24 12:46:13 -04:00
parent 987a58c5bb
commit 431942dff6
1 changed files with 38 additions and 29 deletions
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67
js/iD/Connection.js
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@@ -98,6 +98,43 @@ iD.Connection = function(apiURL) {
return _.find(obj.attributes, filterNodeName(name)).nodeValue;
}
function getTags(obj) {
var tags = {};
// Doesn't use underscore for performance reasons
for (var i = 0; i < obj.childNodes.length; i++) {
var item = obj.childNodes[i];
if (item.nodeName === 'tag') {
tags[getAttribute(item,'k')] = getAttribute(item,'v');
}
}
return tags;
}
function getNodes(obj) {
var nodes = [];
// Doesn't use underscore for performance reasons
for (var i = 0; i < obj.childNodes.length; i++) {
var item = obj.childNodes[i];
if (item.nodeName === 'nd') {
nodes.push(entities[getAttribute(item,'ref')]);
}
}
return nodes;
}
function getMembers(obj) {
return _(obj.childNodes).chain()
.filter(filterNodeName('member'))
.map(function(item) {
var id = getAttribute(item,'ref'),
type = getAttribute(item,'type'),
role = getAttribute(item,'role');
var obj = getOrCreate(id,type);
return new iD.RelationMember(obj,role);
}).value();
}
function parse(callback) {
return function(dom) {
for (var i = 0; i < dom.childNodes[0].childNodes.length; i++) {
@@ -123,35 +160,7 @@ iD.Connection = function(apiURL) {
assign(relation);
}
}
if (callback) { callback(); }
function getTags(obj) {
return _(obj.childNodes).chain()
.filter(filterNodeName('tag'))
.map(function(item) {
return [getAttribute(item,'k'), getAttribute(item,'v')];
}).object().value();
}
function getNodes(obj) {
return _(obj.childNodes).chain()
.filter(filterNodeName('nd'))
.map(function(item) {
return entities[getAttribute(item,'ref')];
}).value();
}
function getMembers(obj) {
return _(obj.childNodes).chain()
.filter(filterNodeName('member'))
.map(function(item) {
var id = getAttribute(item,'ref'),
type = getAttribute(item,'type'),
role = getAttribute(item,'role');
var obj = getOrCreate(id,type);
return new iD.RelationMember(obj,role);
}).value();
}
callback();
};
}