Bug 127070 SVG small font is always antialiased
SVG uses glyphs to render fonts, which cause small fonts to be always anti-aliased (making them slightly blurry), and "low quality SVG" (no antialiasing) text to be almost unreadable. As a more minor side-effect this also causes the SVG source to be not very readable and large in size.
chart/org.eclipse.birt.chart.device.svg/src/org/eclipse/birt/chart/device/svg/SVGRendererImpl.java
labelSB.append(")"); 
					sb.append(",").append(labelSB);
				}
				
				elm.setAttribute("onmousedown", 
						"toggleVisibility(evt, " 
								+ sb.toString()+")"); 							
				setCursor(elm);
	
				
				((SVGGraphics2D)_g2d).addCSSStyle(".class"+seDT.hashCode(), "visibility", "visible"); 
			}
		}
			
		iter = cacheHotspots.keySet().iterator();
		valIter = cacheHotspots.values().iterator();
		while (iter.hasNext()){
			Element elm = (Element)iter.next();
			Series seDT = (Series)valIter.next();
			
			List components = (List)labelPrimitives.get(seDT);
			if (components != null){
				Iterator compIter = components.iterator();
				StringBuffer sb = new StringBuffer();
				sb.append(seDT.hashCode());
				if (compIter.hasNext())
					sb.append(",new Array(");							 
				while (compIter.hasNext()){
					sb.append("'").append(compIter.next()).append("'"); 
					if (compIter.hasNext())