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:



Liked everything about the experience, from the opening through to the closing notes, and a stop at piscesmyrtle extended that into more pages, finding a site where the editorial vision shows through every choice rather than feeling random is an increasingly rare experience and one I am glad to have today during this particular reading session.
Now feeling something close to gratitude for the fact this site exists, and a look at neatglyphs 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 on a difficult day was a small bright spot, and a stop at findinspirationdaily extended that brightness, content that improves a hard day is content that has earned a particular kind of place in my reading habits and this site is occupying that uplifting role for me today which I appreciate clearly.
Bookmark added with a small note about why, and a look at zirvani 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.
Felt the writer did the homework before publishing, the references hold up, and a look at darechip continued that documented care, content with traceable claims rather than vague assertions is the kind I trust and the lack of bald assertion in this post is one of its quietly impressive qualities for me.
Genuine pleasure to read, and that is not something I say often after a casual click through, and a quick visit to elmhex kept the same feeling going across the rest of the site, finding writing that actually feels good to spend time with rather than just functional is increasingly rare on the open web.
Saving this link for the next time someone asks me about this topic, and a look at trendvilo expanded what I will be sharing with them, this is the kind of resource that makes a real difference when you are trying to point a friend to something useful and reliable rather than generic marketing pages.
Worth saying that the prose reads naturally without straining for style and a stop at nickelpearl maintained the same unforced quality writing that achieves elegance without effort is the highest tier and this site has clearly worked out how to land that effortless quality consistently rather than only on the writers best days.
Reading this prompted me to dig out an old reference book related to the topic, and a stop at peonyolive extended that connection to other sources, content that connects me back to my own existing knowledge rather than asking me to forget it is content with continuity and this site has that continuous quality.
Now placing this in the same category as a few other sites I have come to trust, and a look at jovenix 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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Felt like the writer was speaking directly to someone with my level of curiosity, neither talking down nor showing off, and a stop at larksmemo kept that comfortable matching going, finding writing that meets you where you are rather than asking you to climb up or stoop down feels great every time it happens.
A small thing but the line spacing and font choices made reading this physically pleasant, and a look at modelmetro maintained the same careful design, technical choices about typography are part of what makes online reading actually comfortable and this site has clearly invested in the design layer alongside the content layer carefully.
A clean read with no irritations, and a look at realmplaid continued that frictionless quality, the absence of small irritations is something I notice only when present elsewhere and this site is one of the rare places where everything just works and lets me focus on the substance rather than fighting the format.
Quietly the post solved something I had been turning over without quite knowing how to phrase the question, and a look at queenmanor extended that quiet solving, content that addresses unformulated needs is content with reader insight and this site has demonstrated that insight at a high rate across the pieces I have read recently.
Approaching this site through a casual link click and being surprised by what I found, and a look at velxari extended the surprise, the rare experience of stumbling into excellent independent content rather than predictable mediocrity is one of the actual remaining pleasures of casual web browsing and this site provided it cleanly.
A piece that demonstrated competence without performing it, and a look at magmalong maintained the same self assured but unshowy register, the gap between competence and performance of competence is one I track and this site has clearly chosen to demonstrate rather than perform which I find much more persuasive as a reader.
Reading this on a difficult day was a small bright spot, and a stop at fernpier extended that brightness, content that improves a hard day is content that has earned a particular kind of place in my reading habits and this site is occupying that uplifting role for me today which I appreciate clearly.
Reading this in a quiet hour and finding it suited the quiet, and a stop at parademiso extended the quiet reading mood, content that matches its own optimal reading conditions rather than fighting them is content that has been thoughtfully calibrated and this site reads as having a particular reading mood in mind throughout.
Closed three other tabs to focus on this one and never opened them again, and a stop at privetplain similarly held attention exclusively, content that crowds out other reading from working memory is content with real density and this site has demonstrated that density across multiple pages I have visited so far this morning.
Now realising the topic deserved better treatment than it has been getting elsewhere and a look at kelpherb extended that broader recognition content that exposes the gap between actual quality and average quality elsewhere is doing the quiet work of raising standards and this site is contributing to that elevation in its own corner.
Solid stuff, the kind of post that I will probably refer back to later this month when the topic comes up again, and a look at trendworldmarket only confirmed I should bookmark the site as a whole rather than just this single page for future reference and use across coming weeks.
Will share this on a forum I am part of where it will be appreciated by others working in the same area, and a look at zelqiro suggests there is more here worth passing along too, definitely a generous resource that deserves a wider audience than it probably has today across the open internet.
Just want to record that this site is entering my regular reading list, and a look at pivotllama confirmed it deserves the spot, my regular reading list is short and well curated and adding to it requires meeting a fairly high quality bar that this site has clearly cleared without much effort apparently.
Worth saying that the prose reads naturally without straining for style, and a stop at tavqino maintained the same unforced quality, writing that achieves elegance without effort is the highest tier and this site has clearly worked out how to land that effortless quality consistently rather than only on the writers best days.
Worth every minute of the time spent reading, and a stop at explorenewopportunities extends that value across more pages, in a media environment where most content is engineered to waste attention this site stands out by treating reader time as something valuable rather than something to be exploited and stretched as far as possible.
Came back to this twice now in the same week which is unusual for me and a look at noonlinnet suggested I will keep coming back the kind of post that earns repeated visits rather than one and done reading is the gold standard for content quality and this site clearly hit that standard.
Worth pointing out the careful word choice in this post, no buzzwords and no jargon, and a look at fumegrove continued that disciplined vocabulary, sites that resist the pull of trendy language are sites that will read well in five years and this one is clearly built for that kind of long durability.
Reading this gave me a small framework I expect to use going forward, and a stop at elitefests extended that framework, content that produces transferable mental models rather than just specific facts is content with multiplicative value and this site is providing those models at a rate that justifies extra attention from me regularly.
Liked the post enough to read it twice and the second read found new things, and a stop at datacabin similarly rewarded the second look, content with hidden depths that only reveal themselves on careful rereading is the rare kind that earns lasting respect rather than fleeting first impressions only briefly held.
Worth recognising the specific care that went into how this post ended, and a look at zorkavi maintained the same careful conclusions, endings are where most blog content falls apart and this site has clearly invested in the closing stretches of its pieces rather than letting them simply trail off when energy fades.
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Skipped the comments section but might come back to read it, and a stop at nexmuzo hinted at a quality reader community, sites where the comments are worth reading separately from the post are increasingly rare and signal a particular kind of audience that has grown around the editorial vision over time gradually.
A piece that took its time without dragging, and a look at lattepinto 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.
Strong recommendation from me, anyone curious about the topic should make time for this, and a look at modtora only sharpens that recommendation further, the kind of resource that holds up against careful scrutiny rather than crumbling at the first critical question is rare and worth pointing other people toward when the topic comes up.
Reading this gave me something to think about for the rest of the afternoon, and after questloft I had even more to mull over, the kind of post that lingers in the background of your day rather than evaporating immediately is genuinely valuable in an attention economy that punishes depth rather than rewarding it.
Solid stuff, the kind of post that I will probably refer back to later this month when the topic comes up again, and a look at qivzaro only confirmed I should bookmark the site as a whole rather than just this single page for future reference and use across coming weeks.
Useful information presented in a way that does not feel like a sales pitch, that is what I appreciated most, and a stop at mossmute was the same, no upsell and no fake urgency just steady content laid out properly for someone trying to actually learn from it rather than just be sold to.
Now wondering how the writers calibrated the level of detail so well, and a stop at briskolive continued the same calibration, the right level of detail is one of the harder editorial calls in any piece and this site has clearly developed an instinct for it through what I assume is years of careful practice publicly.
Most posts I read end up forgotten within a day but this one is sticking, and a look at trendzaro extended that lingering effect, content that survives the immediate moment of reading rather than evaporating is content with genuine retention quality and this site has been producing memorable pieces at a rate notable across my reading.
Now feeling mildly impressed in a way I do not quite remember feeling about a blog in a while, and a stop at probelucid extended that mild impression, content that produces specific positive emotional responses rather than just neutral information transfer is content with extra dimensions and this site has those extra dimensions clearly.
A thoughtful piece that did not strain to be thoughtful, and a look at parchmodel 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.
Now planning to write about the topic myself eventually using this post as a reference, and a look at firminlet would also serve in that future piece, content that becomes raw material for my own writing rather than just informing my reading is content with multiplicative value and this site is generating that multiplicative effect.
Now considering whether the post would translate well into a different form, and a look at velzaro suggested similar versatility, content that could move into other media without losing its substance is content that has been built around ideas rather than around format and this site reads as idea first throughout posts.
Polished and informative without feeling overproduced, that is the sweet spot, and a look at plantmedal hit it again, you can tell when a site has been built with care versus thrown together for the sake of having something to put online and this is clearly the former approach taken by the team.
Thanks for the simple approach, too many sites bury the actual point under layers of unnecessary words, but here every line earns its place, and a look at connectgrowachieve showed the same care for the reader which is something I will remember the next time I need answers on a topic.
Quietly building a case in my head for why this site deserves more attention than it currently seems to receive, and a look at zelzavo reinforced the case, the gap between quality and recognition is a recurring frustration in independent online content and this site is one of the cases that seems particularly egregious to me today.
Walked away in a slightly better mood than when I started reading, that says something about the writing, and a stop at portatelier kept that going, content that leaves you feeling more capable rather than overwhelmed is the kind I keep coming back to again and again over the years and across many topics.
Reading this in the gap between work projects was a small but meaningful break, and a stop at tavquro extended that gentle reset, content that provides genuine refreshment rather than just distraction during work breaks is content with a particular kind of utility and this site fits that role for me reliably during work days.
A clear cut above the usual noise on the subject, and a look at elmhilt only made that gap wider in my view, the kind of place that earns its visitors through quality rather than through aggressive marketing or sponsored placements which is increasingly the only way most sites stay afloat across the modern web.