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    <p>Javascript engine executes functions one by one by taking them from sort of a queue. Functions can be put there either by your script or as result of user's actions (event handlers). So idea is to split long-running task into small short-running subtasks and feed them into this 'queue' in the manner so they can be mixed with functions responding to user's action.<br/> This can be done by calling window's setTimeout with zero delay and passing your sub-task as a function. Thus you will give a chance for UI event handler to be executed earlier</p> <pre><code>function plotSpot(spot) { // adding spots to map }; var spots = [1,2,3,4,5,6,7,8,9,10,11,12]; var plotSpotsBatch; plotSpotsBatch = function() { var spotsInBatch = 10; while(spots.length &gt; 0 &amp;&amp; spotsInBatch--) { var spot = spots.shift(); plotSpot(spot); } if (spots.length &gt; 0) { setTimeout(plotSpotsBatch, 0); } }; plotSpotsBatch(); </code></pre> <p>Here is extension for Array prototype:</p> <pre><code>Array.prototype.forEachInBatches = function(batchSize, func) { var arr = this; var i = 0; var doer; doer = function() { setTimeout(function() { for (var stopBatch = i + batchSize; i &lt; stopBatch &amp;&amp; i &lt; arr.length; i++) { func(arr[i], i); } if (i &lt; arr.length) { doer(); } }, 0); }; doer(); }; </code></pre> <p>Usage example (you have to have div with id 'spots' somewhere in document). To see the difference, set batch size equal to number of spots:</p> <pre><code>var spots = []; for (var i = 0; i &lt; 10000; i++) { spots.push('{x: ' + Math.ceil(Math.random() * 180) + ', y: ' + Math.ceil(Math.random() * 180) + '}'); } spots.forEachInBatches(10, function(spot, i) { document.getElementById('spots').innerHTML += spot + (i &lt; spots.length ? '; ' : ''); }); </code></pre>
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    1. COI like this solution. it's simple and intuitive.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

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