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perf(Change Detection): Track the range & group on changes only 

1.4x speed improvement with Firefox

There is no need to track the range & group for all the records but only
for the records that have changed.
This commit is contained in:
Victor Berchet 2014-12-04 14:23:23 +01:00
parent ee36063fae
commit 2c4a2f5158
1 changed files with 6 additions and 7 deletions
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13
modules/change_detection/src/change_detector.js
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@ -17,24 +17,23 @@ export class ChangeDetector {
var count = 0;
var updatedRecords = null;
var record = this._rootRecordRange.findFirstEnabledRecord();
var currentRange, currentGroup;
while (isPresent(record)) {
var currentRange = record.recordRange;
var currentGroup = record.groupMemento();
if (record.check()) {
count++;
if (record.terminatesExpression()) {
currentRange = record.recordRange;
currentGroup = record.groupMemento();
updatedRecords = this._addRecord(updatedRecords, record);
}
}
if (isPresent(updatedRecords)) {
var nextEnabled = record.nextEnabled;
var nextRange = isPresent(nextEnabled) ? nextEnabled.recordRange : null;
var nextGroup = isPresent(nextEnabled) ? nextEnabled.groupMemento() : null;
if (currentRange != nextRange || currentGroup != nextGroup) {
if (isBlank(nextEnabled) || // we have reached the last enabled record
currentRange != nextEnabled.recordRange || // the next record is in a different range
currentGroup != nextEnabled.groupMemento()) { // the next record is in a different group
currentRange.dispatcher.onRecordChange(currentGroup, updatedRecords);
updatedRecords = null;
}