Mark Liversedge 4bd94e9411 UI Nits: LTMSidebar performance ...

Don't refresh CP, LTM or Histogram plots when dateRange property
is set, if the dateRange was previously plotted anyway. Will set
to stale if a ride is added or deleted too.

This means the replot of tabs is not performed when simply switching
between tabs. But will if the date range does change or a ride is
added or deleted meaning the aggregate needs to be re-calculated.

There is still one more performance improvement required;

1. get RideFileCache to have a cache of recent aggregations.
   Since (a) the same ranges will be called over and over by
   different charts when a season is selected and (b) there
   are only likely to be 20-30 seasons defined in total, so
   lets cache them instead of recalculating every time.

2012-11-27 13:41:36 +00:00

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