Improve the performance of JSList.iterator().
Improve the performance of JSList.iterator().

Implement JSList.iterator() using KVTransaction.getRange().
The default implementation inherited from AbstractList is less
efficient; for example, it invokes size() for each element.

tempbottle/jsimpledb,archiecobbs/jsimpledb,archiecobbs/jsimpledb,tempbottle/jsimpledb,permazen/permazen,permazen/permazen,archiecobbs/jsimpledb,tempbottle/jsimpledb,permazen/permazen