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:
Thanks again for the post, I learned a couple of things I can actually use later this week, and after I went over draftport the rest of the site looked equally promising, definitely going to spend more time here when I get a free moment over the weekend to read more carefully.
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Reading this confirmed a hunch I had been carrying about the topic without having articulated it, and a stop at selectshare extended the confirmation, content that gives shape to fuzzy intuitions is doing the rare work of making private thoughts public and this site is providing that articulating service consistently for me lately.
Speaking from the perspective of having read widely on the topic this site offers something distinct, and a look at tagbyte reinforced that distinctness, the rare site that contributes something genuinely original to a saturated topic is the rare site worth following carefully and this one has demonstrated that original contribution capability today.
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Now adding the writer to a small mental list of voices I want to follow, and a look at sodasherpa reinforced that follow intention, the few writers whose work I actively track are writers who have demonstrated sustained quality and this writer has clearly demonstrated that sustained quality across the pieces I have sampled here today.
Worth every minute of the time spent reading, and a stop at loneohm 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.
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Found this via a link from another piece I was reading and the click was worth it, and a stop at saddleswamp extended the value across more material, the open web still rewards clicking through citations when the underlying writers care about each other work and this site clearly belongs to that network.
Took a quick scan first and then went back to read properly because the post deserved it, and a stop at vinylslogan 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.
Closed it feeling I had taken something away rather than just consumed something, and a stop at uppersharp 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.
Honest reaction is that I want to send this to a friend who would benefit from it, and a look at saddlevicar added more material I will pass along too, the impulse to share is the strongest signal I have for content quality and this site is generating that impulse cleanly across multiple posts.
Strong recommendation from me, anyone curious about the topic should make time for this, and a look at triadsharp 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.
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Felt slightly impressed without being able to point to one specific reason, and a look at qalnexo 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.
Reading this slowly because the writing rewards a slower pace, and a stop at sonartennis did the same, the pace at which I read content is something I now use as a quality signal and writing that earns a slower pace earns my attention as a reader looking for substance these days.
Looking back on this reading session it stands as one of the better ones recently, and a look at sonarsandal 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.
A particular pleasure to read this with a fresh coffee, and a look at rivqiro extended the pleasure across more pages, content that pairs well with quiet morning rituals is something I have come to value highly and this site has the kind of energy that fits naturally into a calm reading routine.
Good clean post, no errors and no awkward phrasing that breaks the reading flow, and a stop at driftfair kept the same standard, definitely the kind of editorial care that earns a return visit because it tells me the writer is paying attention to details that matter to readers rather than just rushing publication.
Worth recognising that this site does not chase the daily news cycle, and a stop at discoverlimitlessoptions confirmed the longer publication arc, sites that resist the pressure to comment on every passing event are sites with genuine editorial discipline and this one has clearly chosen depth over volume which I respect deeply.
Will be back, that is the simplest way to say it, and a quick visit to tundratoken reinforced the decision, this site has earned a spot in my regular rotation alongside a few other reliable places I check when I want something genuinely informative without all the usual modern web noise getting in the way.
Reading this gave me a small sense of progress on a topic I have been slowly working through, and a stop at tallysubdue added another step forward, learning happens in small increments across many sources and finding sources that consistently contribute is the actual practical value of careful curation in an information rich world.
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Found this through a search that was generic enough I did not expect quality results, and a look at laurelmallow continued the surprisingly good experience, search engines occasionally still surface excellent independent content if you scroll past the obvious paid and high authority results which is reassuring to remember sometimes.
Worth recognising the absence of the usual blog tropes here, and a look at meadochre continued that fresh quality, sites that avoid the standard moves of the medium read as more original even when the content is on familiar topics and this one has clearly chosen its own path through the conventional terrain skilfully.
Just want to record that this site is entering my regular reading list, and a look at parsleymulch 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.
Reading this slowly to give it the attention it deserved, and a stop at zornexo earned the same slow read, choosing to read slowly is a small act of respect for content quality and very few sites earn that respect from me but this one did so without any explicit ask which is the cleanest way.
Looking through other posts here the consistency is what makes the site valuable rather than any single piece, and a stop at tasseltennis extended that consistency observation, sites whose value lies in the ongoing pattern rather than in standout posts are sites I trust more deeply and this one has clearly built that kind of trust.
Glad I clicked through from where I did because this turned out to be worth the time spent and after solidtiger I had a fuller picture the kind of content that earns its visitors through delivering value rather than chasing them through aggressive advertising or constant pop ups appearing everywhere on the screen lately.
A piece that read smoothly because the writer understood how readers actually move through prose, and a look at skifftornado maintained the same reader awareness, writers who think about the reading experience as much as the writing experience produce better work and this site has clearly made that shift in editorial approach.
Coming back tomorrow when I can give this a proper read, the post deserves better attention than I can give right now, and a look at villageswan suggests there is plenty more here that deserves the same treatment, definitely a site I will be exploring properly over the next few days when I can.
Pass this along to colleagues if the topic comes up, the framing here is sensible, and a stop at swirllink adds more useful angles to share, the kind of content that improves conversations rather than just feeding them is what makes a resource genuinely valuable in professional contexts going forward over time and across project boundaries too.
Picked up two new ideas that I expect will come up in conversations this week, and a look at gondoenvoy added another, content that arms me with talking points rather than just filling time is the kind that provides ongoing value beyond the moment of reading and this site is generating that kind of ongoing value.
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The conclusions felt earned rather than tacked on at the end like an afterthought, and a look at twainverge kept that careful structure going, you can tell when a writer has thought about the shape of their post versus just letting it ramble out and hoping for the best at the end which most do.
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Decided this was the kind of site I would defend in a discussion about good blog content, and a stop at voguesage 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.
Glad I gave this a chance instead of bouncing on the headline, and after sonarturtle I was certain I had made the right call, snap judgements based on titles miss a lot of good content and this is a reminder to slow down and check things out before scrolling past in a hurry.
Reading this post made me realise I had been settling for lower quality elsewhere, and a look at turbinevault extended that recalibration, content that exposes how much I had been accepting in adjacent sources is content with calibrating effect on my standards and this site is performing that calibration function across topics for me reliably.
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Started smiling at one paragraph because the writing was just nice, and a look at unlockyourfullpotential produced a couple more such moments, prose that produces small spontaneous reactions in the reader is doing more than just transferring information and the writers here are clearly hitting that level fairly consistently throughout pieces.
Picked a single sentence from this post to remember, and a look at duetcoast gave me another to keep, content that produces memorable lines is doing more than just transferring information and the small selection of sentences I keep from each reading session is one of the actual returns I get from reading carefully.
Most of the time I feel the open web is in decline and then I find a site like this, and a stop at thriftsundae reinforced that mood lift, the cumulative effect of finding occasional excellent independent content versus the cumulative effect of finding mostly mediocre content is real for the long term reader maintaining web habits today.
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The examples really helped me grasp the points faster than abstract descriptions would have, and a stop at tallysmoke added a few more practical illustrations that drove the message home, the kind of writing that knows its readers learn better through concrete situations rather than vague generalities is rare and worth recognising clearly.
Over the course of reading several posts here a pattern of quality has emerged, and a stop at passionload confirmed the pattern, the difference between sites that hit quality occasionally and sites that hit it consistently is huge and this site has clearly demonstrated the consistent kind through what I have read this morning.
Halfway through I knew I would finish the post, and a stop at leafpatio 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.
Honestly enjoyed reading this more than I expected to when I first clicked through, and a stop at trendandbuy kept that pleasant surprise going, sometimes you stumble onto a site that just clicks with how you like to read and this is one of those for me right now today which is great.