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Micro-optimize search #482

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Micro-optimize search #482

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a15e241
Fix references to mocha css and js on test page
trotzig Jan 13, 2017
0f27cb7
Memoize regex pattern in search.js
trotzig Jan 13, 2017
5227a8f
Use memoized RegExp when searching
trotzig Jan 13, 2017
fe31757
Move case-ignoring to RegExp
trotzig Jan 13, 2017
4368a6b
Use RegExp.test instead of String.search when matching
trotzig Jan 13, 2017
a0e12ab
Make templater.clear a bit faster
trotzig Jan 14, 2017
098175b
Use document fragment to speed up list.update()
trotzig Jan 14, 2017
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43 changes: 28 additions & 15 deletions dist/list.js
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Original file line number Diff line number Diff line change
Expand Up @@ -235,23 +235,23 @@ var List = function(id, options, values) {

this.update = function() {
var is = self.items,
il = is.length;
il = is.length,
frag = document.createDocumentFragment();

self.visibleItems = [];
self.matchingItems = [];
self.templater.clear();
for (var i = 0; i < il; i++) {
if (is[i].matching() && ((self.matchingItems.length+1) >= self.i && self.visibleItems.length < self.page)) {
is[i].show();
self.templater.create(is[i]);
frag.appendChild(is[i].elm);
self.visibleItems.push(is[i]);
self.matchingItems.push(is[i]);
} else if (is[i].matching()) {
self.matchingItems.push(is[i]);
is[i].hide();
} else {
is[i].hide();
}
}
self.list.appendChild(frag);
self.trigger('updated');
return self;
};
Expand Down Expand Up @@ -430,11 +430,13 @@ module.exports = function(list) {
};

},{"./item":4}],6:[function(require,module,exports){
var REGEX_CHARACTERS_PATTERN = /[-[\]{}()*+?.,\\^$|#]/g;

module.exports = function(list) {
var item,
text,
columns,
searchString,
searchPattern,
customSearch;

var prepare = {
Expand Down Expand Up @@ -462,10 +464,14 @@ module.exports = function(list) {
columns = (list.searchColumns === undefined) ? prepare.toArray(list.items[0].values()) : list.searchColumns;
}
},
setSearchString: function(s) {
setSearchPattern: function(s) {
s = list.utils.toString(s).toLowerCase();
s = s.replace(/[-[\]{}()*+?.,\\^$|#]/g, "\\$&"); // Escape regular expression characters
searchString = s;
if (s === "") {
searchPattern = undefined;
return;
}
s = s.replace(REGEX_CHARACTERS_PATTERN, "\\$&"); // Escape regular expression characters
searchPattern = new RegExp(s, 'i');
},
toArray: function(values) {
var tmpColumn = [];
Expand All @@ -492,8 +498,8 @@ module.exports = function(list) {
},
values: function(values, column) {
if (values.hasOwnProperty(column)) {
text = list.utils.toString(values[column]).toLowerCase();
if ((searchString !== "") && (text.search(searchString) > -1)) {
text = list.utils.toString(values[column]);
if (searchPattern && searchPattern.test(text)) {
return true;
}
}
Expand All @@ -509,16 +515,16 @@ module.exports = function(list) {
list.trigger('searchStart');

prepare.resetList();
prepare.setSearchString(str);
prepare.setSearchPattern(str);
prepare.setOptions(arguments); // str, cols|searchFunction, searchFunction
prepare.setColumns();

if (searchString === "" ) {
if (!searchPattern) {
search.reset();
} else {
list.searched = true;
if (customSearch) {
customSearch(searchString, columns);
customSearch(searchPattern, columns);
} else {
search.list();
}
Expand Down Expand Up @@ -778,7 +784,7 @@ var Templater = function(list) {
return false;
}
if (itemSource === undefined) {
throw new Error("The list need to have at list one item on init otherwise you'll have to add a template.");
throw new Error("The list needs to have at least one item on init otherwise you'll have to add a template.");
}
/* If item source does not exists, use the first item in list as
source for new items */
Expand All @@ -803,6 +809,13 @@ var Templater = function(list) {
}
};
this.clear = function() {
if (typeof document.createRange === 'function') {
// Slightly faster, but not supported in IE<9
var range = document.createRange();
range.selectNodeContents(list.list);
range.deleteContents();
return;
}
/* .innerHTML = ''; fucks up IE */
if (list.list.hasChildNodes()) {
while (list.list.childNodes.length >= 1)
Expand Down
2 changes: 1 addition & 1 deletion dist/list.min.js
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2 changes: 1 addition & 1 deletion docs/assets/javascripts/list.min.js
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10 changes: 5 additions & 5 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -233,23 +233,23 @@ var List = function(id, options, values) {

this.update = function() {
var is = self.items,
il = is.length;
il = is.length,
frag = document.createDocumentFragment();

self.visibleItems = [];
self.matchingItems = [];
self.templater.clear();
for (var i = 0; i < il; i++) {
if (is[i].matching() && ((self.matchingItems.length+1) >= self.i && self.visibleItems.length < self.page)) {
is[i].show();
self.templater.create(is[i]);
frag.appendChild(is[i].elm);
self.visibleItems.push(is[i]);
self.matchingItems.push(is[i]);
} else if (is[i].matching()) {
self.matchingItems.push(is[i]);
is[i].hide();
} else {
is[i].hide();
}
}
self.list.appendChild(frag);
self.trigger('updated');
return self;
};
Expand Down
24 changes: 15 additions & 9 deletions src/search.js
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Original file line number Diff line number Diff line change
@@ -1,8 +1,10 @@
var REGEX_CHARACTERS_PATTERN = /[-[\]{}()*+?.,\\^$|#]/g;

module.exports = function(list) {
var item,
text,
columns,
searchString,
searchPattern,
customSearch;

var prepare = {
Expand Down Expand Up @@ -30,10 +32,14 @@ module.exports = function(list) {
columns = (list.searchColumns === undefined) ? prepare.toArray(list.items[0].values()) : list.searchColumns;
}
},
setSearchString: function(s) {
setSearchPattern: function(s) {
s = list.utils.toString(s).toLowerCase();
s = s.replace(/[-[\]{}()*+?.,\\^$|#]/g, "\\$&"); // Escape regular expression characters
searchString = s;
if (s === "") {
searchPattern = undefined;
return;
}
s = s.replace(REGEX_CHARACTERS_PATTERN, "\\$&"); // Escape regular expression characters
searchPattern = new RegExp(s, 'i');
},
toArray: function(values) {
var tmpColumn = [];
Expand All @@ -60,8 +66,8 @@ module.exports = function(list) {
},
values: function(values, column) {
if (values.hasOwnProperty(column)) {
text = list.utils.toString(values[column]).toLowerCase();
if ((searchString !== "") && (text.search(searchString) > -1)) {
text = list.utils.toString(values[column]);
if (searchPattern && searchPattern.test(text)) {
return true;
}
}
Expand All @@ -77,16 +83,16 @@ module.exports = function(list) {
list.trigger('searchStart');

prepare.resetList();
prepare.setSearchString(str);
prepare.setSearchPattern(str);
prepare.setOptions(arguments); // str, cols|searchFunction, searchFunction
prepare.setColumns();

if (searchString === "" ) {
if (!searchPattern) {
search.reset();
} else {
list.searched = true;
if (customSearch) {
customSearch(searchString, columns);
customSearch(searchPattern, columns);
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This might be a breaking change, depending on how people use the customSearch option.

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searchPattern.source could help.

} else {
search.list();
}
Expand Down
9 changes: 8 additions & 1 deletion src/templater.js
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Original file line number Diff line number Diff line change
Expand Up @@ -132,7 +132,7 @@ var Templater = function(list) {
return false;
}
if (itemSource === undefined) {
throw new Error("The list need to have at list one item on init otherwise you'll have to add a template.");
throw new Error("The list needs to have at least one item on init otherwise you'll have to add a template.");
}
/* If item source does not exists, use the first item in list as
source for new items */
Expand All @@ -157,6 +157,13 @@ var Templater = function(list) {
}
};
this.clear = function() {
if (typeof document.createRange === 'function') {
// Slightly faster, but not supported in IE<9
var range = document.createRange();
range.selectNodeContents(list.list);
range.deleteContents();
return;
}
/* .innerHTML = ''; fucks up IE */
if (list.list.hasChildNodes()) {
while (list.list.childNodes.length >= 1)
Expand Down
4 changes: 2 additions & 2 deletions test/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
<head>
<meta charset="utf-8">
<title>List.js Mocha Tests</title>
<link rel="stylesheet" href="../node_modules/grunt-mocha/node_modules/mocha/mocha.css" />
<link rel="stylesheet" href="../node_modules/mocha/mocha.css" />
<style>
#list,
#parse-list,
Expand All @@ -17,7 +17,7 @@
<script src="../node_modules/jquery/dist/jquery.js"></script>
<script src="../dist/list.js"></script>
<script src="../node_modules/expect.js/index.js"></script>
<script src="../node_modules/grunt-mocha/node_modules/mocha/mocha.js"></script>
<script src="../node_modules/mocha/mocha.js"></script>

<script>
mocha.setup('bdd');
Expand Down