diff --git a/js/jquery.stickytableheaders.js b/js/jquery.stickytableheaders.js
index 3cffd91..7475db3 100644
--- a/js/jquery.stickytableheaders.js
+++ b/js/jquery.stickytableheaders.js
@@ -8,7 +8,11 @@
 		id = 0,
 		defaults = {
 			fixedOffset: 0,
-			leftOffset: 0,
+			leftOffset:  0,
+			setStylesOnce: true,
+			cacheHeights:  true,
+			flushHeightAfter: 0,
+			flushHeightEvery: 5000,
 			scrollableArea: window
 		};
 
@@ -18,9 +22,12 @@
 		var base = this;
 
 		// Access to jQuery and DOM versions of element
-		base.$el = $(el);
-		base.el = el;
-		base.id = id++;
+		base.$el  = $(el);
+		base.$els = [];
+		base.el   = el;
+		base.id   = id++;
+
+		base.heights = [];
 		base.$window = $(window);
 		base.$document = $(document);
 
@@ -38,9 +45,18 @@
 		base.leftOffset = null;
 		base.topOffset = null;
 
+		base.resetHeights = function() {
+			base.$el.each(function (idx, elem) {
+				base.heights[idx] = {table : null, cHeader : null};
+			});
+		}
+
+		base.delayedReset = $.noop;
+
 		base.init = function () {
-			base.$el.each(function () {
+			base.$el.each(function (idx, elem) {
 				var $this = $(this);
+				base.$els[idx] = $this;
 
 				// remove padding on <table> to fix issue #7
 				$this.css('padding', 0);
@@ -65,8 +81,24 @@
 
 			base.setOptions(options);
 			base.updateWidth();
-			base.toggleHeaders();
+			base.toggleHeaders({type:'init'});
 			base.bind();
+
+			if (base.options.cacheHeights && base.options.flushHeightAfter)
+				setTimeout(base.resetHeights, base.options.flushHeightAfter);
+			if (base.options.cacheHeights && base.options.flushHeightEvery)
+				base.delayedReset = (function(func, every) {
+					var timeout = 0;
+					return function() {
+							if (timeout)
+								return false;
+
+							var res = func();
+							timeout = setTimeout(function(){ timeout = 0; }, every);
+							return res;
+						}
+				})(base.resetHeights, base.options.flushHeightEvery);
+
 		};
 
 		base.destroy = function (){
@@ -110,10 +142,23 @@
 			base.$scrollableArea.off('.' + name, base.updateWidth);
 		};
 
-		base.toggleHeaders = function () {
+		base.getCached = function($elem, what, idx, key)
+		{
+			if (base[what + 's'][idx][key])
+				return base[what + 's'][idx][key];
+			else
+				return base[what + 's'][idx][key] = $elem[what]();
+		}
+
+		base.toggleHeaders = function (ev) {
+			if ('scroll' == ev.type)
+				base.delayedReset();
+			else
+				base.resetHeights();
+
 			if (base.$el) {
-				base.$el.each(function () {
-					var $this = $(this),
+				base.$el.each(function (idx, elem) {
+					var $this = base.$els[idx],
 						newLeft,
 						newTopOffset = base.isWindowScrolling ? (
 									isNaN(base.options.fixedOffset) ?
@@ -130,25 +175,44 @@
 								scrollTop > offset.top :
 								newTopOffset > offset.top,
 						notScrolledPastBottom = (base.isWindowScrolling ? scrollTop : 0) <
-								(offset.top + $this.height() - base.$clonedHeader.height() - (base.isWindowScrolling ? 0 : newTopOffset));
-
+								(
+									offset.top +
+									(
+										base.options.cacheHeights && ev /* Filling cache only when scrolling */ ? 
+												
+												base.getCached($this, 'height', idx, 'table') :
+												$this.height()
+									) -
+									(
+										base.options.cacheHeights && ev ?
+												base.getCached(base.$clonedHeader, 'height', idx, 'cHeader') :
+												base.$clonedHeader.height()
+									) -
+									(base.isWindowScrolling ? 0 : newTopOffset)
+								);
 					if (scrolledPastTop && notScrolledPastBottom) {
 						newLeft = offset.left - scrollLeft + base.options.leftOffset;
-						base.$originalHeader.css({
-							'position': 'fixed',
-							'margin-top': 0,
-							'left': newLeft,
-							'z-index': 3 // #18: opacity bug
-						});
-						base.leftOffset = newLeft;
-						base.topOffset = newTopOffset;
-						base.$clonedHeader.css('display', '');
+						var doSet = !base.options.setStylesOnce || !base.isSticky || newLeft != base.leftOffset;
+						if (doSet) {
+							
+							base.$originalHeader.css({
+								'position': 'fixed',
+								'margin-top': 0,
+								'left': newLeft,
+								'z-index': 3 // #18: opacity bug
+							});
+							base.leftOffset = newLeft;
+							base.topOffset = newTopOffset;
+							base.$clonedHeader.css('display', '');
+						}
 						if (!base.isSticky) {
 							base.isSticky = true;
 							// make sure the width is correct: the user might have resized the browser while in static mode
 							base.updateWidth();
 						}
-						base.setPositionValues();
+						if (doSet) {
+							base.setPositionValues();
+						}
 					} else if (base.isSticky) {
 						base.$originalHeader.css('position', 'static');
 						base.$clonedHeader.css('display', 'none');
@@ -253,7 +317,7 @@
 			base.unbind();
 			base.bind();
 			base.updateWidth();
-			base.toggleHeaders();
+			base.toggleHeaders({type:'update'});
 		};
 
 		// Run initializer