Victor Berchet 2c4a2f5158 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.
2014-12-08 21:59:59 +01:00
..
2014-12-08 21:59:59 +01:00
2014-12-04 11:01:19 +01:00