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:



A well calibrated piece that knew its scope and stayed inside it, and a look at trendyvaluezone maintained the same scope discipline, scope creep is one of the failure modes of long blog posts and this site has clearly invested in the editorial discipline to prevent it which shows up in tightly contained pieces.
Polished and informative without feeling overproduced, that is the sweet spot, and a look at honestharvesthub 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 honest framing without exaggerated claims that the topic will change my life and a stop at shopandsmiletoday kept the same modest tone restraint in marketing language signals trustworthiness and the writers here are clearly playing the long game by building credibility rather than chasing immediate clicks through hyperbole.
Picked this for my morning read because the topic seemed worth the time, and a look at kindlecrestmarket confirmed the choice was right, my morning reading slot is precious and giving it to this site felt like a good investment rather than a waste which is a higher endorsement than I usually offer for content.
Felt no urge to argue with the conclusions even though I started the post slightly skeptical, and a look at happylivingoutlet maintained that pattern, writing that earns agreement through clarity of argument rather than rhetorical pressure is the kind I find most persuasive and the kind I want to read more of these days.
Reading this site over the past week has changed how I evaluate content in this space, and a look at rustictrademarket 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.
Worth flagging this post as worth a careful read rather than a casual skim, and a stop at dreamdiscovercreate earned the same careful approach, the few sites that warrant slower reading are sites I now treat differently from the daily content stream and this one has clearly moved into that elevated treatment category.
Great work on keeping things readable, the post never drags or repeats itself which I really appreciate, and a stop at fashionpicksmarket added a bit more context that fit naturally with what was already said here, no need to read everything twice to get the point being made today.
If I had encountered this site five years ago I would have been telling everyone about it, and a look at fashionfindsmarket extended that retrospective enthusiasm, the version of me who used to recommend favourite blogs frequently would have made sure friends knew about this one and that earlier enthusiasm is partially returning to me here.
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Going to come back when I have more time to read carefully, the post deserves more than a quick scan, and a stop at newvoyagecorner reinforced that, this is the kind of site that rewards a slower read which is hard to find in this fast paced corner of the internet but really worthwhile.
Coming back to this one, definitely, and a quick visit to softcloudboutique only made me more sure of that, the kind of writing that makes you want to set aside time later rather than rushing through it now while distracted by everything else competing for attention on the screen today across so many tabs.
Worth a slow read rather than the fast scan I usually default to, and a look at trendycollectionstore earned the same slower pace from me, content that resets my reading speed downward is content with substance worth absorbing and this site has produced that effect on me multiple times now over the last week here.
Reading this gave me confidence to make a decision I had been putting off, and a stop at simpletrendbuy reinforced that confidence, content that translates into action in my own life rather than just informing it is content with the highest practical value and this site is generating that action level utility for me lately.
Worth saying that the prose reads naturally without straining for style, and a stop at dreamfashionoutlet 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.
Looking back on this reading session it stands as one of the better ones recently, and a look at happybuycorner extended that ranking, the informal ranking of reading sessions against each other is something I do mentally and this session ranks high largely because of this site and a couple of related pages here.
Now noticing how rare it is to find a site that does not feel rushed, and a look at urbanbuycorner extended that calm pace, content produced without time pressure has a different quality than content shipped to meet a deadline and this site reads as written without urgency which produces a different and better experience for readers.
Solid recommendation from me to anyone working in the area, the perspective here is grounded, and a look at simplehomefinds adds even more useful angles, the kind of site that becomes a reference rather than just a one time read which is a higher bar than most blogs ever reach today on the modern web.
Well done, the writing is professional without being stiff, and the topic is treated with care, and a look at boldstreetboutique reflected that approach, the kind of site I would point a colleague to if they asked for a reliable starting point on this topic in the future without any hesitation at all.
Honest reaction is that this is the kind of writing I would defend in a conversation about good blog content, and a look at yourdealhub reinforced that, the rare site whose work I would actively recommend rather than just tolerate is the kind I want to support through return visits regularly.
Came in confused about the topic and left with a much firmer grasp on it, and after timberwoodcorner I felt I could explain this to someone else without hesitation, that is the gold standard for any educational content and most sites simply fail to reach it ever which is unfortunate but true.
Glad to have another data point on a question I am still thinking through, and a look at warmwindsmarket added two more, content that acknowledges its place in a wider conversation rather than pretending to settle the question alone is intellectually honest in a way that I wish was more common across the open web.
A quiet piece that did not try to compete on volume, and a look at yourfavstore maintained that selective approach, sites that publish less but better are increasingly rare in an environment that rewards volume and this one has clearly chosen quality cadence over quantity which is a brave editorial decision in current conditions.
Just wanted to drop a quick note saying this was a useful read on a topic I have been circling, no fluff, and a stop at clearport added a few extra points that fit the same simple style which makes the whole site feel coherent rather than thrown together by many different writers with different goals.
Reading this slowly and letting each paragraph land before moving on and a stop at purestylecollection earned the same patient approach content that rewards slow reading rather than speed is content with real density and the writers here are clearly producing work that benefits from the careful eye rather than the rushed scan.
Easy to recommend, the content speaks for itself without needing additional praise from me, and a stop at highpineoutlet only adds more reasons to send people this way, the kind of generous resource that benefits its readers without demanding anything in return is increasingly rare and worth recognising clearly today across the broader open internet.
Came in skeptical and left mostly convinced, that is the highest praise I can offer, and a look at globalfashioncenter pushed me further in the same direction, content that survives a critical first read is rare and worth recognising because most blog posts crumble under any real scrutiny these days when you actually pay attention closely.
Without overstating it this is a quietly excellent post, and a look at globalstylecorner extended that quiet excellence, content that earns superlatives without demanding them through marketing language is content that has truly earned them through the substance and this site has clearly produced work in that earned excellence category today.
The way the post stayed on topic throughout without going on tangents was really refreshing, and a look at inspireeverymoment kept that focused approach going, discipline like this in writing is rare and worth recognising because most writers cannot resist wandering off into related subjects that dilute their main point and confuse readers along the way.
My usual pattern is to skim and bounce but this site has reset that pattern temporarily, and a stop at trendworldmarket maintained the slower reading mode, content that changes how I read is content with structural influence and this site has clearly nudged my reading behaviour toward something better at least for the duration of these visits.
If you scroll past this site without looking carefully you will miss something, and a stop at believeinyourdreams 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.
Thanks for the readable length, I finished it without checking how much was left, and a stop at purevaluecorner kept me reading the same way, when I stop noticing the length of a piece because the content is engaging enough to sustain attention without willpower the writer has done their job well today.
Reading this fit naturally into my afternoon walk because I was reading on my phone, and a stop at fashiondealstore continued well in that walking format, content that survives mobile reading without becoming awkward is content with format flexibility and this site has clearly thought about how it reads across different devices today.
Quiet confidence runs through the whole post, no need to shout to make the points stick, and a stop at happylivinghub carried that same restrained voice forward, content that respects the reader by trusting its own substance rather than dressing it up in theatrical language is what I look for online and rarely actually find these days.
Appreciated that the writer trusted the reader to follow along without constant restating of earlier points, and a look at mountainmistgoods continued that respect for the reader, treating an audience as capable adults rather than as people to be hand held through every paragraph is something I notice and value highly across the open internet today.
Reading this in pieces over a coffee break and finding it consistently rewarding, and a stop at fashionloversoutlet extended that into related material I will return to later, the kind of site that fits naturally into small reading windows without requiring a long uninterrupted block is genuinely useful for how I actually browse.
Reading this confirmed a small detail I had been uncertain about, and a stop at softblossomcorner provided the source for further checking, content that supports verification through citations or links rather than just asserting facts is more trustworthy and this site has clearly built its credibility through that kind of verifiable approach consistently.
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Left me wanting to read more rather than feeling burned out, that is a good sign, and a look at buildconfidencehere 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.
Reading this triggered a small change in how I think about the topic going forward, and a stop at trendycollectionstore reinforced that subtle shift, the rare content that actually moves my thinking rather than just confirming or filling it is the kind I most value and this site is providing that kind of impact today.
Now placing this in the small category of sites whose updates I would actually want to know about, and a stop at simpledealmarket confirmed that placement, the difference between sites I want to follow and sites I just consume from is real and this one has crossed into the active follow category from the casual consumption side.
Closed the tab feeling I had spent the time well, and a stop at shopthebestdeals extended that feeling across more pages, the test of whether time on a site was well spent is one I apply silently after closing tabs and very few sites pass it but this one passed it cleanly today afternoon clearly.
Bookmarking this for later, the kind of resource I want to keep nearby, and a quick look at oldtownstylehub confirmed the rest of the site is worth the same treatment, definitely going into my reference folder for the next time the topic comes up at work or in conversation with someone who asks.
Speaking carefully because I do not want to overstate things this site is genuinely above average across multiple measurements, and a stop at urbanwilddesigns continued the above average performance, the calibration of judgement against potential overstatement is something I take seriously and this site clears the higher bar even after that calibration applies.
Solid recommendation from me to anyone working in the area the perspective here is grounded and a look at puregiftmarket adds even more useful angles the kind of site that becomes a reference rather than just a one time read which is a higher bar than most blogs ever reach today on the modern web.
Liked the natural conversational tone throughout, never stiff and never overly casual either, and a stop at highlandcraftstore kept that comfortable middle ground going, finding a tone that respects the reader without becoming distant or overly familiar is harder than it sounds and this site nails that balance consistently across many different pieces.
Really like the way the post resists reaching for cliches that would have made it feel generic, and a quick visit to grandforeststudio kept that fresh feel going, original phrasing and unexpected metaphors are signs that the writer is actually thinking rather than just stitching together familiar phrases into the appearance of content.
Now thinking about this site as a small example of what good independent writing looks like, and a stop at yourbuyingcorner continued that exemplary status, the few sites that serve as good examples are sites worth holding up in conversations about quality and this one has earned that exemplary placement through patient consistent effort over time.
Skipped past the first paragraph thinking it was setup and had to come back when the rest referenced it, and a stop at futurepathmarket similarly rewarded careful reading from the start, content where every paragraph carries weight is content I now know to read from the beginning rather than skipping ahead.
Looking at this from the perspective of someone tired of generic content the contrast is striking, and a look at globalchoicehub maintained that distinctive feel, sites with strong editorial identity stand out against the bland background of algorithmic content and this one has clearly developed an identity worth recognising through careful attention.