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Optimize LoopStatus variable for v8 using class

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This commit is contained in:
Patrick Steele-Idem 2016-08-11 17:30:54 -06:00
parent 73b9268e0c
commit fe0d1a749c
1 changed files with 15 additions and 7 deletions
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22
runtime/helpers.js
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@ -107,6 +107,13 @@ function resolveRenderer(handler) {
return createDeferredRenderer(handler); return createDeferredRenderer(handler);
} }
function LoopStatus(getLength, isLast, isFirst, getIndex) {
this.getLength = getLength;
this.isLast = isLast;
this.isFirst = isFirst;
this.getIndex = getIndex;
}
module.exports = { module.exports = {
/** /**
* Internal helper method to prevent null/undefined from being written out * Internal helper method to prevent null/undefined from being written out
@ -129,25 +136,26 @@ module.exports = {
} }
var i = 0; var i = 0;
var len = array.length; var len = array.length;
var loopStatus = { var loopStatus = new LoopStatus(
getLength: function () { function getLength() {
return len; return len;
}, },
isLast: function () { function isLast() {
return i === len - 1; return i === len - 1;
}, },
isFirst: function () { function isFirst() {
return i === 0; return i === 0;
}, },
getIndex: function () { function getIndex() {
return i; return i;
} });
};
for (; i < len; i++) { for (; i < len; i++) {
var o = array[i]; var o = array[i];
callback(o, loopStatus); callback(o, loopStatus);
} }
}, },
/** /**
* Internal helper method to handle loops without a status variable * Internal helper method to handle loops without a status variable
* @private * @private