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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Reading this prompted me to dig into a related topic later, and a stop at duetdrives provided some of the starting points for that follow up reading, content that triggers further exploration rather than satisfying curiosity completely is content with real generative energy and this site has plenty of that energy throughout it.
Found the use of subheadings really helpful for scanning back through the post later, and a stop at heliokindle 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.
Considered alongside other sources I have been reading this one consistently rises to the top, and a stop at marketpearl maintained that top ranking, the informal ongoing comparison between sources is something I do whenever reading on a topic and this site keeps coming out near the top of those comparisons over many sessions.
Just nice to read something that does not feel like it was assembled from a content brief, and a stop at pebbleaisle kept that handcrafted feel going, you can tell when a real human with real understanding is behind the words versus a templated piece churned out for an algorithm to find.
Definitely a recommend from me, anyone curious about the topic should check this out, and a look at silverharborvendorparlor 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.
Came here from another site and ended up exploring much further than I planned, and a look at gnarfrost only encouraged more exploration, the kind of place where one click leads to another not through manipulative design but through genuinely interesting content is rare and worth highlighting when found like this somewhere on the open internet.
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Just wanted to say this was useful and leave a small note of thanks, and a quick visit to fancyhale earned a similar nod from me, the small acknowledgements add up over time and represent the real economy of trust that good content runs on across the open and increasingly fragmented modern internet.
One of the more honest takes on the topic I have seen lately, no spin and no oversell, and a stop at groovehale kept that going, the kind of voice the open web could use a lot more of rather than the endless echo chamber of recycled opinions floating around every social platform these days.
Now feeling something close to gratitude for the fact this site exists, and a look at flankisle extended that gratitude, the rare site that produces this kind of response is the rare site worth defending in conversations about whether the modern internet is still capable of producing genuinely valuable independent content for serious adults.
Reading this gave me a small refresher on something I had partially forgotten and a stop at huskkindle extended the refresher content that strengthens existing knowledge rather than just adding new is content with a particular kind of consolidating value and this site is providing that consolidating function across multiple visits.
Decided this was the kind of site I would defend in a discussion about good blog content, and a stop at clingclasp reinforced that, very few sites earn active defence rather than passive consumption and this one has clearly crossed that threshold for me without needing any explicit pitch from the writers themselves either.
Liked the careful selection of which details to include and which to skip, and a stop at harborlark reflected the same editorial judgement, knowing what to leave out is just as important as knowing what to include and this site has clearly figured out where that line sits for the topics it covers regularly.
Taking the time to read carefully here has been worthwhile for the past hour and a look at joustglade extended the worthwhile reading the calculation of return on reading time spent is something I do informally and this site has been producing positive returns across multiple sessions during the last week of regular visits and reads.
Worth saying that the quiet confidence of the writing is what landed first, and a look at kudosember continued that quiet quality, confident writing without the loud display of confidence is a rare combination and this site has clearly developed both the knowledge and the editorial restraint to land that combination consistently.
A piece that did not require external context to follow, and a look at mistvendor maintained the same self contained quality, content that stands alone without forcing readers to chase prerequisites is more accessible and this site has clearly thought about how each piece can serve a fresh visitor rather than only existing members.
Really nice to see things explained without overcomplicating the topic, the words flow naturally and stay easy to follow, and a short visit to gallohex only added to that experience because the same simple approach is used across the rest of the page too without any change in tone.
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Glad to have another reliable bookmark for this topic, and a look at maplegrovemarketparlor suggested several more pages I will be marking too, building a personal library of trustworthy resources is one of the actual rewards of careful browsing and this site is earning a place on my permanent shortlist for the topic.
Halfway through reading I knew this would be one to bookmark, and a look at thoughtfulcommerceplatform confirmed that early intuition, when bookmark intent forms before finishing a post you know the writing has cleared a quality bar that most content fails to clear and this site has cleared it on multiple visits already.
Picked up a couple of new ideas here that I can actually try out, and after my visit to helmkit I have even more notes saved, this is the kind of resource that pays you back for the time you spend on it which is rare to come across in this corner of the web.
Bookmark added with a small note about why, and a look at grovefalcon prompted another bookmark with another note, the bookmarks I annotate are the ones I expect to return to deliberately rather than stumble into and this site is generating annotated bookmarks at a higher rate than my usual content sources by some margin.
A thoughtful piece that did not strain to be thoughtful, and a look at flumelake continued that effortless quality, when thinking shows up in writing without the writer drawing attention to it you know you are reading something genuinely considered rather than something performing the appearance of consideration which is also common online.
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Closed the laptop and walked away thinking about the post for a good twenty minutes, and a stop at grovefarms produced similar lingering thoughts, content that survives the closing of the browser tab is content that has actually entered the mind rather than just decorating the screen for the duration of the reading.
Thanks for the clean writing, no broken sentences and no awkward translations like some other sites have, and a quick stop at gnarkit kept that polish going nicely, it really does make a difference when a reader can move through a page without tripping on every line or going back to reread.
Liked the careful selection of which details to include and which to skip, and a stop at flankivory reflected the same editorial judgement, knowing what to leave out is just as important as knowing what to include and this site has clearly figured out where that line sits for the topics it covers regularly.
Once you start reading carefully here it is hard to go back to lower quality alternatives and a stop at iconflank reinforced that ratchet effect the way good content raises standards is real over time and this site has clearly contributed to raising my expectations for what is possible in writing on the topic generally.
Learned something from this without having to dig through layers of fluff, and a stop at fawnetch added a bit more context that helped tie things together for me, definitely a useful corner of the internet for anyone who wants real information without the usual marketing nonsense around it that often ruins similar pages.
Started this morning and finished at lunch with a small sense of having spent the time well, and a look at iciclemart extended that satisfaction into the afternoon, content that fits naturally into the rhythm of a working day rather than demanding a dedicated reading block is increasingly the kind I prefer.
Felt slightly impressed without being able to point to one specific reason, and a look at clevergoodszone continued that diffuse positive feeling, when content works at a level you cannot easily articulate the writer is doing something with craft rather than just delivering information and that is something I have learned to recognise.
Bookmark moved to my permanent reference folder rather than the casual maybe later folder, and a look at gambitfort earned the same upgrade, the distinction between casual interest and lasting reference is something I track carefully and very few sites cross that threshold but this one did so without much effort apparently.
This stands out compared to similar posts I have read recently, less noise and more substance, and a look at honeymarket kept that gap going, you can really feel the difference between content made by someone who cares versus content made to fill a publishing schedule for an algorithm trying to keep growing somehow.
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Stands out for actually being useful instead of just being long, and a look at depotglow kept that going, length without value is the default mode of most blogs these days but this site has clearly chosen a different path which I respect a lot as a reader who values careful editing decisions like that.
Reading this gave me a small jolt of recognition for an experience I thought was just mine, and a stop at silkgrovevendorroom produced more such jolts, content that universalises private experiences without flattening them is doing genuinely useful work and this site is providing that recognition function for me reliably across topics I read.
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This stands out compared to similar posts I have read recently, less noise and more substance, and a look at oasiscrate kept that gap going, you can really feel the difference between content made by someone who cares versus content made to fill a publishing schedule for an algorithm trying to keep growing somehow.
Took me back a step or two on an assumption I had been making, and a stop at guavaflank pushed that reconsideration further, writing that gently corrects the reader without being aggressive about it is a rare diplomatic skill and the team here clearly knows how to land critical points without turning readers off.
Left me wanting to read more rather than feeling burned out, that is a good sign, and a look at herbfife confirmed there is plenty more here to explore, the kind of writing that builds appetite rather than killing it which is a rare quality on the modern open internet today across most categories of content.
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If quality blog writing is dying as people sometimes claim then this site is one piece of evidence that it has not died yet and a look at idleflint extended that evidence the broader cultural question about online writing has empirical answers in specific sites and this one is contributing to a more optimistic answer overall.
Took a quick scan first and then went back to read properly because the post deserved it, and a stop at flaskkelp kept me reading carefully too, the kind of writing that earns a slower second pass rather than getting skimmed and forgotten is something I value highly when I happen to find it.
If you scroll past this site without looking carefully you will miss something, and a stop at globalcuratedgoods extended that mild warning, the surface of the site does not advertise its quality loudly which means careful attention is required to recognise what is being offered here which is itself a kind of editorial signal.
Came away with a small but real shift in perspective on the topic, and a stop at goldenknack 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.
Picked this for a morning recommendation in our company chat, and a look at clipchime suggested I will mention this site again later, recommending content into a workplace context is a small editorial act that requires confidence in the recommendation and this site is making me confident in those recommendations consistently here too.
Saving the link for sure, this one is a keeper, and a look at draftglades confirmed I should bookmark the entire site rather than just this page, the consistency across what I have seen so far suggests there is a lot more here worth coming back for soon when I have more time.