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POjQuery show/hide column on big table performance
 

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    <p>I have html table with about 30 columns and somewhere between 10 to 500 ish rows. I would like to show/hide a set of columns o a button click. </p> <p>I have tried 2 approaches</p> <ol> <li>iterate through table's thead th and do .show() or .hide() on the TH and TD.</li> <li>iterate through table's thead th and change class to show/hide the TH and TD.</li> </ol> <p>the function is implemented as following snippet. However, the performance is not that great. Show/Hide say 20 columns takes about 5~10 seconds on maybe 80~120 rows of data.</p> <p>i am just wondering if there is anything we can do to make it go faster.</p> <pre><code>function ToggleHeadVisibility(showHide) { var index = 0; $('#' + gridViewName + ' thead th').each(function(index) { index++; if (showHide == "SHOW") { /* $('#' + gridViewName + ' th:nth-child(' + (index) + ')').show(); $('#' + gridViewName + ' td:nth-child(' + (index) + ')').show(); */ $('#' + gridViewName + ' th:nth-child(' + (index) + ')').removeClass('columnHide'); $('#' + gridViewName + ' td:nth-child(' + (index) + ')').removeClass('columnHide'); } else if (showHide = "HIDE") { /* //if (showColumnArray.has($(this).get(0).innerHTML)) { if (showColumnArray.has($(this).attr('title'))) { $('#' + gridViewName + ' th:nth-child(' + (index) + ')').show(); $('#' + gridViewName + ' td:nth-child(' + (index) + ')').show(); } else { $('#' + gridViewName + ' th:nth-child(' + (index) + ')').hide(); $('#' + gridViewName + ' td:nth-child(' + (index) + ')').hide(); } */ if (showColumnArray.has($(this).attr('title'))) { $('#' + gridViewName + ' th:nth-child(' + (index) + ')').removeClass('columnHide'); $('#' + gridViewName + ' td:nth-child(' + (index) + ')').removeClass('columnHide'); } else { $('#' + gridViewName + ' th:nth-child(' + (index) + ')').addClass('columnHide'); $('#' + gridViewName + ' td:nth-child(' + (index) + ')').addClass('columnHide'); } } }); } </code></pre>
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    1. COsome interesting comparison on show/hide performance http://www.learningjquery.com/2010/05/now-you-see-me-showhide-performance
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