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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I learned more from this short post than from longer articles I read earlier today, and a stop at progresswithmeaning added even more useful detail without going off topic, this site clearly knows how to keep things focused without sacrificing depth which is a hard balance to strike for any writer.
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A piece that took its time without dragging, and a look at momentumflowing kept the same patient pace, the difference between unhurried and slow is a fine editorial distinction and this site has clearly found the unhurried side without slipping into the slow side which would have lost me as a reader quickly otherwise.
Speaking as someone who reads a lot on this topic this site has earned a high position in my source rankings, and a stop at hazelharborvendorhall reinforced that ranking, the informal ranking of sources for a topic is something I maintain mentally and this site has moved into the upper portion of those rankings clearly.
Reading this gave me a quiet moment of intellectual pleasure that I had not been expecting, and a stop at clarityfirstexecution extended that pleasure across more pages, the unexpected reward of stumbling into careful writing is one of the small ongoing pleasures of reading the open web and this site is delivering it reliably.
Definitely a recommend from me, anyone curious about the topic should check this out, and a look at bayharbortradehouse adds even more reason for that, the depth and quality combine to make this site one I will be pointing people toward whenever similar conversations come up over the months ahead at work or socially.
Probably going to mention this site in a write up I am working on later this month, and a stop at actionwithclarity provided more material for that potential mention, content worth referencing in my own published work rather than just personal reading is content with the highest endorsement level and this site has earned that endorsement.
Now feeling confident enough in this site to use it as a reference point for evaluating others on the same topic and a look at ideaactivation continued the comparison friendly quality sites that serve as quality benchmarks for their topic are precious and this one has clearly become a benchmark for me on this particular subject area.
Halfway through I knew I would finish the post, and a stop at focusbuildsresults also held me through to the end, content that signals its quality early and then sustains it is content with real internal consistency and this site has clearly figured out how to maintain quality from opening sentence through to closing thought.
Came in tired from a long day and the writing held my attention anyway, and a stop at kettlecrestmarkethouse kept that going, content that can engage a fatigued reader is doing something right because most online reading happens in suboptimal conditions like that one and quality content adapts to it without complaint.
Bookmark earned and folder updated to track this site separately, and a look at cloudharborcommercegallery confirmed the folder upgrade was the right call, organising my reading list so that good sites do not get lost in a sea of casual bookmarks is something I do more carefully now and this site warranted its own spot.
Found the use of subheadings really helpful for scanning back through the post later, and a stop at quickshoppingcorner kept that reader friendly approach going, navigation is something many blog writers ignore but small structural choices make a noticeable difference for someone returning to find a specific point again days or weeks later.
Reading this brought back the satisfaction I used to get from blogs ten years ago, and a stop at globalgoodscenter kept that nostalgic quality alive, sites that capture what was good about an earlier era of internet writing are increasingly precious and this one is doing that without feeling like a deliberate throwback at all.
Better than most of the writing I have come across on this topic recently, simpler and more direct, and a look at dawnridgegoodsgallery continued in that same way, a real outlier in a crowded space full of repetitive content that says little while taking up a lot of reader time today which is unfortunate.
Took a screenshot of one section to come back to later, and a stop at clarityguidance prompted another saved tab, the urge to capture and revisit specific pieces of content is something I rarely feel but when I do it tells me the work is worth more than the average passing read for sure.
Picked something concrete from the post that I will use immediately, and a look at progresswithdirection added another concrete piece, content that produces immediately useful output rather than just abstract appreciation is content that earns its place in my regular rotation without needing any further evaluation from me at this point honestly.
The whole experience of reading this was pleasant from start to finish, no pop ups and no annoying interruptions, and a look at motionstrategy continued that clean experience, technical choices about page design matter for the reader and this site clearly cares about the small details that add up to comfort across multiple visits.
Now feeling the post has earned a proper recommendation rather than a casual mention, and a stop at fashioncartworld reinforced the recommendation strength, the difference between mentioning and recommending is a small editorial distinction I observe in my own conversations and this site has earned the upgraded recommendation level from me confidently today.
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Nice and clean, that is the best way to describe the writing here, no clutter and no wasted words, and a quick visit to strategyvector kept that going, I appreciate when a site treats its readers like people who can think for themselves without needing constant hand holding through every paragraph.
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