Below are two graphs plotting the number of images on a page against the total KB transferred by Chrome 13 for both a page with JSIO and without JSIO (which I, for some reason have called a “plain” page).
I build websites for a living, so I have a lot of folders of images from various websites lying around which form the two data sets for the graphs. I’d like to think of them as a typical set of website images, but you may argue that they are typical for the websites that I build.
I knocked up a script that when given a folder of images, will output a “plain” HTML page, a JSIO HTML page and a JSIO resources file with the following numbers of images on them: 2, 4, 6, 8, 10, 20, 30, 40, 50, 60, 70, 80, 90, 100, 200, 300, 400, 500, 600, 700, 800, 900, 1000 and 1100. Before generating any of the pages, the order of the images were randomised to better represent a web page’s inclusion of different images for different purposes.
Chrome 13 was used with the developer toolbar to determine how many requests were being made and the actual KB transferred (with slight rounding errors) by the browser. In my opinion I would say that Apache was set up to serve image and javascript content typical of many servers on the internet in that images were not gzipped but javascript files were; the register, bbc, for example.
What is interesting to note is that the number of bytes transferred by JSIO are consistently lower than the bytes transferred by a plain HTML page…but not by a lot. The file size inflation due to base64 encoding seems to cancel out a lot of bytes the gained from making fewer requests. However, it is obvious that JSIO won’t actually lose you any bytes, but it isn’t going to save you a substantial amount. That said, saving bytes isn’t the only benefit of JSIO, remember that one of JSIO’s goals is also to alleviate some of the problems surrounding the creation and use of image sprites – which it does also do very well.
The graph below is just for fun, it plots the number of requests made by JSIO pages against the number of requests made by plain HTML pages. Note the JSIO pages make a constant 4 requests (index.html, jsio.js, jsio-resources.js and jsio.gif) independent of how many images are on the page:
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Skipped the TLDR thinking I would read everything anyway, and ended up enjoying the path through the full post, and a stop at gemcoast similarly rewarded the patient read, summaries are useful but the journey through good writing is part of what makes the destination feel earned rather than just delivered cleanly.
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Reading this site over the past week has changed how I evaluate content in this space and a look at domemarinas extended that recalibration the standards I bring to reading on the topic have shifted upward as a direct result of regular exposure to this kind of work and that shift will outlast any single reading session.
Closed it feeling I had taken something away rather than just consumed something, and a stop at fondarbors extended that taking away feeling, the difference between content I extract value from and content I just pass through is something I track informally and this site is consistently in the value extraction column for me.
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Appreciated the way each section connected smoothly to the next without abrupt jumps, and a stop at modernvalueclickfront kept that flow going nicely, transitions are something most blog writers ignore but the difference is huge for the reader who is trying to follow a sustained line of thought today across many different topics.
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Reading this on a slow Sunday and finding it perfectly suited to a slow Sunday read, and a quick stop at lakequill kept the same gentle pace, content that fits the mood of the moment is something I notice and remember and this site has the kind of pace that suits relaxed reading sessions especially well.
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Now placing this in the same category as a few other sites I have come to trust, and a look at lcbclosure continued the placement decision, the small category of fully trusted sites is one I extend rarely and only after multiple positive reading sessions and this site has earned the category placement methodically over time.
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Came away with a small but real shift in perspective on the topic, and a stop at draftlakes pushed that shift a bit further, the kind of subtle reframing that good writing does to a reader without making a big deal of it is something I always appreciate when it happens which is sadly not that often.
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Felt this in a way I cannot quite explain, the topic just hit different here, and a stop at leafdawn continued in that vein, sometimes you find a site whose perspective lines up with how you have been thinking and reading their work feels like a small relief which I appreciated more than I expected.
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