snapshot node

snapshot.js

start = Date.now();
size = pv_list.length;

pv_list.forEach(function(pv) {
  ca.exec('caget', pv, function(err, result) {
    complete = complete + 1;
    if (err) {
      results[pv] = {
        name: pv,
        value: 'unavailable'
      };
    } else {
      results[pv] = ca.parseCaget(result);
    }
    if (complete == size) {
      console.log('the snapshot took ' + (Date.now() - start) + ' milliseconds.');
    }
  });
});