However, if your website needs to be incredibly fast, you should consider aggressive image optimization. Depending on the CMS you use, you will have certain settings to optimize to ensure that image compression remains under your full control.
If you are using WordPress, you should know that it compresses your images by default. You can increase or decrease the level of compression used by your CMS in the functions. We do not recommend this for beginners or intermediate WordPress users.
Instead, you should just aim to enhance what WordPress already does in terms of image compression. Depending on the type of blog you are running, lossy vs lossless can be turned into a battlefield. You should look into the type of image format you use most often to help you figure out your needs.
The second thing you have to keep in mind is that you may upload one image, but your CMS will be creating many more. WordPress often creates three to five variations of each image in different sizes. So, image optimization can quickly become a big deal for your blog. If you are unsure which route you should go, we recommend picking a lossy compression. Test things out first, of course, to make sure the results are up to your standards. Not sure if images are dragging your performance down?
Take a page from your website, put it through the online optimizer , and see the results! If you plan to use Google Page Speed Insights, you need to consider that this tool uses one specific algorithm to analyze your images. This can lead to a false-positive result telling you to optimize images that are already optimized.
Images often account for most of the downloadable bytes on a page. And this tendency has been steadily growing over the years, especially for online stores. Optimizing images can make a difference for an e-commerce website because customers expect to find what they seek fast. The challenge is to find a way to provide high-resolution photos of products for shoppers while keeping load times fast.
There are many strategies for optimizing photos out there. These include the following. PNG is a lossless compression type. It is often used where the graphic might be changed by another person or where the image contains layers of graphics that need to be kept separate from each other.
It is high quality. With lossy compression it is about finding a medium ground which you are happy with, for file size and still retaining an acceptable image quality. Lossless compression refers to compression in which the image is reduced without any quality loss. It is important to note that since JPEGs are a lossy format that when using the "maximum" preset in Photoshop, this doesn't mean it is lossless.
However, even images exported from Photoshop using the "Save for Web" function can still see significant reductions. The big benefit to lossless compression is that you can retain the quality of your image and still achieve a smaller file size.
We took the same image again and ran it through our Optimus Image Optimizer plugin, which uses lossless compression. It also creates progressive JPEGs. If you look in the dark gray areas this time you can see there is almost no noticeable difference. So if you are looking to retain the quality of your images, lossless compression is definitely the way to go. And of course we can't forget about WebP.
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