Improved Compression Ratios Using Zopfli

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Google recently opensourced an interesting little project in C called ZOPFLI to binaria veneto zopflipng to get the most compression possible out of gzip which is one of the only universal compression available in browsers.

This is useful for things that are compressed once and served many times, for example jquery, stylesheets, etc. If you want to try it, you can get it at: Note that you may have to fix your mingw install by copying a few files or changing your path.

Or if you are lazy and feel you binaria veneto zopflipng trust me, here is a zopfli windows binary. It was filed under random stuff and was tagged with compressiongzipzopfli.

Or if you are Google and happen to serve a gazillion files per day. Think of all the sites binaria veneto zopflipng linking http: If they can make that smaller via a one time compression process, then that will probably multiply out to a reasonable win. I have a feeling that very binary brokers and scams text data binaria veneto zopflipng not a great test of zopfli, in my 25mb test 7zip was actually about 10k smaller, tho kzip was smaller still.

PNGZopfli is a way of compressing png files using Zopfli. When I use your zopfli. There is an overhead per packet about 64 bytesand it will be split across multiple packets, but they are most certainly not fixed binaria veneto zopflipng. You are commenting using your WordPress. You are commenting using your Binaria veneto zopflipng account.

You are commenting using your Facebook account. Notify me of new comments via email. Notify me of new posts via email. Or if you are lazy and feel you can trust me, here is a zopfli windows binary Comparison: March 2, at 6: February 2, at 6: March 19, at 2: Cheers January 30, at Leave a Reply Cancel reply Enter your comment here Fill in your details below or click an icon to log in: Email Address never made public.

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Compressing files can be a very effective way of reducing their size as they are transferred between the server and a user's browser.

Most modern browsers work effectively with compressed files and use lossless compression formats such as Gzip, Deflate or Zlib. In order to compress a file, an encoder is needed to process the file and compress it into the required format. There are a number of different encoders and many of them are very effective at quickly processing and compressing files on-the-fly.

Most of these encoders achieve good file compression ratios, but each of them has their pros and cons. Whilst this may seem like a small improvement, remember every byte saved makes download speeds just that little bit faster! Google Fonts actually uses Zopfli to compress all of the fonts that they serve.

Rather, Zopfli is an improvement to the encoding algorithm for these formats. You must be thinking - this is amazing, when can I start using it? You can start using Zopfli immediately, but while it does come with improved compression ratios, it does unfortunately come at a cost.

In order to achieve such high compression rates, Zopfli encodes at a significantly slower rate when compared to other encoders. In this article, I am going to run through a simple example using Grunt , the JavaScript task runner, to compress a file using the Zopfli encoder in a GZip format. We are going to use the Grunt Zopfli plugin ; the source code is available on Github. Before we get started, we need to use the Zopfli library binary to process our files.

You can either download this compiled version that I have created on Github , or download a copy of the original source and compile it for yourself.

Next, install a copy of Grunt in your development directory by typing the following into the console. The command above will save a copy of the Grunt Zopfli plugin to your development directory. Before we begin compressing our files, we need to create a Gruntfile in order to reference the files that we want to process.

My Gruntfile looks a little something like the following:. In the code above, I am pointing to the original version of my file and creating a new compressed copy of the file called processed. As is the convention with Gzipped files, the extension should end in a ". Next, I am adding a reference to the zopfli. All that is left to do is run the task against our file. Simply type "grunt" into the console.

You should notice a file called processed. This file is processed and ready to roll. GZip is a standard format supported by most modern servers and browsers, and in order to use your newly processed file you may need to configure your server accordingly. The great thing about this plugin is that once you have automated your build process, any changes will be picked up and compressed accordingly. For further details, there is a great video interview with the Google Web Fonts team about how they used Zopfli to improve their compression ratios.

I also recommend having a look at the Google Developers blog for more information. Finally, if you are having trouble getting up and running, I have created a repo on Github with the full source code for this example.

Menu Home About Subscribe. My Gruntfile looks a little something like the following: