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Reduce temporary objects created in _.merge, _.clone, and _.isEqual.

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Former-commit-id: e6696642505f39eefdf59075ff8a993ab033465a
This commit is contained in:
John-David Dalton
2012-09-10 20:12:42 -07:00
parent 4fc3c969d3
commit 2afb2dd5fd
2 changed files with 42 additions and 33 deletions
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23
build/pre-compile.js
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@@ -44,7 +44,7 @@
'callee',
'className',
'compareAscending',
'destValue',
'data',
'forIn',
'found',
'funcs',
@@ -66,10 +66,11 @@
'propsLength',
'recursive',
'source',
'stack',
'sources',
'stackLength',
'target',
'valueProp'
'valueProp',
'values'
];
/** Used to minify `compileIterator` option properties */
@@ -107,18 +108,17 @@
'__chain__',
'__proto__',
'__wrapped__',
'a',
'after',
'all',
'amd',
'any',
'attachEvent',
'b',
'bind',
'bindAll',
'chain',
'clearTimeout',
'clone',
'clones',
'collect',
'compact',
'compose',
@@ -214,6 +214,9 @@
'sortBy',
'sortedIndex',
'source',
'sources',
'stackA',
'stackB',
'tail',
'take',
'tap',
@@ -304,7 +307,7 @@
// minify internal properties used by 'compareAscending', `_.clone`, `_.isEqual`, `_.merge`, and `_.sortBy`
(function() {
var properties = ['criteria', 'index', 'source', 'thorough', 'value'],
var properties = ['clones', 'criteria', 'index', 'sources', 'thorough', 'value', 'values'],
snippets = source.match(/( +)(?:function (?:clone|compareAscending|isEqual)|var merge|var sortBy)\b[\s\S]+?\n\1}/g);
if (!snippets) {
@@ -319,7 +322,7 @@
properties.forEach(function(property, index) {
var reBracketProp = RegExp("\\['(" + property + ")'\\]", 'g'),
reDotProp = RegExp('\\.' + property + '\\b', 'g'),
rePropColon = RegExp("(')?\\b" + property + "\\1 *:", 'g');
rePropColon = RegExp("([^?])(')?\\b" + property + "\\2 *:", 'g');
if (isCompilable) {
// add quotes around properties in the inlined `_.merge` and `_.sortBy`
@@ -328,20 +331,20 @@
modified = modified
.replace(reBracketProp, "['" + minNames[index] + "']")
.replace(reDotProp, "['" + minNames[index] + "']")
.replace(rePropColon, "'" + minNames[index] + "':");
.replace(rePropColon, "$1'" + minNames[index] + "':");
}
else {
modified = modified
.replace(reBracketProp, '.' + minNames[index])
.replace(reDotProp, '.' + minNames[index])
.replace(rePropColon, minNames[index] + ':');
.replace(rePropColon, '$1' + minNames[index] + ':');
}
}
else {
modified = modified
.replace(reBracketProp, "['" + minNames[index] + "']")
.replace(reDotProp, '.' + minNames[index])
.replace(rePropColon, "'" + minNames[index] + "':")
.replace(rePropColon, "$1'" + minNames[index] + "':")
// correct `value.source` in regexp branch of `_.clone`
if (property == 'source') {